/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 11:47:41,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 11:47:41,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 11:47:41,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 11:47:41,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 11:47:41,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 11:47:41,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 11:47:41,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 11:47:41,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 11:47:41,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 11:47:41,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 11:47:41,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 11:47:41,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 11:47:41,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 11:47:41,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 11:47:41,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 11:47:41,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 11:47:41,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 11:47:41,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 11:47:41,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 11:47:41,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 11:47:41,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 11:47:41,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 11:47:41,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 11:47:41,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 11:47:41,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 11:47:41,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 11:47:41,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 11:47:41,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 11:47:41,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 11:47:41,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 11:47:41,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 11:47:41,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 11:47:41,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 11:47:41,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 11:47:41,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 11:47:41,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 11:47:41,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 11:47:41,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 11:47:41,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 11:47:41,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 11:47:41,172 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf [2020-04-18 11:47:41,186 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 11:47:41,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 11:47:41,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 11:47:41,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 11:47:41,188 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 11:47:41,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 11:47:41,188 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 11:47:41,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 11:47:41,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 11:47:41,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 11:47:41,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 11:47:41,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 11:47:41,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 11:47:41,189 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 11:47:41,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 11:47:41,190 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 11:47:41,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 11:47:41,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 11:47:41,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 11:47:41,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 11:47:41,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 11:47:41,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:47:41,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 11:47:41,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 11:47:41,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 11:47:41,192 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 11:47:41,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 11:47:41,192 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-18 11:47:41,192 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 11:47:41,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 11:47:41,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 11:47:41,510 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 11:47:41,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 11:47:41,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 11:47:41,538 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 11:47:41,539 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 11:47:41,541 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2020-04-18 11:47:41,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1601dcd6/54f8112908ce4a1e823b3def62e89aca/FLAGa94374d21 [2020-04-18 11:47:42,188 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 11:47:42,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2020-04-18 11:47:42,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1601dcd6/54f8112908ce4a1e823b3def62e89aca/FLAGa94374d21 [2020-04-18 11:47:42,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1601dcd6/54f8112908ce4a1e823b3def62e89aca [2020-04-18 11:47:42,449 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 11:47:42,466 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 11:47:42,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 11:47:42,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 11:47:42,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 11:47:42,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0eb770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42, skipping insertion in model container [2020-04-18 11:47:42,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 11:47:42,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 11:47:43,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:47:43,030 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 11:47:43,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:47:43,180 INFO L208 MainTranslator]: Completed translation [2020-04-18 11:47:43,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43 WrapperNode [2020-04-18 11:47:43,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 11:47:43,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 11:47:43,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 11:47:43,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 11:47:43,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 11:47:43,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 11:47:43,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 11:47:43,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 11:47:43,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 11:47:43,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 11:47:43,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 11:47:43,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 11:47:43,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (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 [2020-04-18 11:47:43,334 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 11:47:43,335 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 11:47:43,335 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 11:47:43,335 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 11:47:43,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 11:47:43,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 11:47:43,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 11:47:43,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 11:47:43,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 11:47:43,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 11:47:43,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 11:47:43,338 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 11:47:43,730 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 11:47:43,730 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 11:47:43,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:47:43 BoogieIcfgContainer [2020-04-18 11:47:43,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 11:47:43,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 11:47:43,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 11:47:43,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 11:47:43,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 11:47:42" (1/3) ... [2020-04-18 11:47:43,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8c4914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:47:43, skipping insertion in model container [2020-04-18 11:47:43,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (2/3) ... [2020-04-18 11:47:43,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8c4914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:47:43, skipping insertion in model container [2020-04-18 11:47:43,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:47:43" (3/3) ... [2020-04-18 11:47:43,743 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2020-04-18 11:47:43,754 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 11:47:43,755 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 11:47:43,763 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 11:47:43,764 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 11:47:43,791 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,791 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,791 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,792 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,792 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,792 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,793 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,793 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,793 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,794 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,794 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,794 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,794 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,795 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,795 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,796 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,796 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,796 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,796 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,797 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,797 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,797 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,797 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,798 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,798 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,798 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,799 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,799 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,799 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,800 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,803 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,804 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,804 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,804 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,805 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,805 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,812 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,813 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,813 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,813 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,813 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,814 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,831 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 11:47:43,850 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 11:47:43,850 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 11:47:43,851 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 11:47:43,851 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 11:47:43,851 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 11:47:43,851 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 11:47:43,851 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 11:47:43,851 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 11:47:43,865 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,867 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,904 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 11:47:43,904 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:47:43,910 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 11:47:43,913 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,931 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 11:47:43,931 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:47:43,932 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 11:47:43,934 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-18 11:47:43,935 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-18 11:47:45,093 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-18 11:47:45,167 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-18 11:47:45,168 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-18 11:47:45,172 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-18 11:47:45,184 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 11:47:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 11:47:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:47:45,194 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:45,195 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 11:47:45,196 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-18 11:47:45,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:45,211 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1615853255] [2020-04-18 11:47:45,224 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,234 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:47:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 11:47:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:47:45,237 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:45,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 2 times [2020-04-18 11:47:45,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850575241] [2020-04-18 11:47:45,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:45,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850575241] [2020-04-18 11:47:45,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:45,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:45,471 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:45,472 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,476 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:47:45,476 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:45,507 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:47:45,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 11:47:45,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 11:47:45,520 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-04-18 11:47:45,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,546 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 11:47:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 11:47:45,547 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:45,549 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1615853255] [2020-04-18 11:47:45,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:45,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:47:45,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1615853255] [2020-04-18 11:47:45,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 11:47:45,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 11:47:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:47:45,565 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-18 11:47:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,621 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-18 11:47:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 11:47:45,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-18 11:47:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:45,635 INFO L225 Difference]: With dead ends: 83 [2020-04-18 11:47:45,635 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 11:47:45,637 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:47:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 11:47:45,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-18 11:47:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 11:47:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-18 11:47:45,699 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-18 11:47:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:45,699 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-18 11:47:45,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 11:47:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-18 11:47:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,701 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:45,701 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:45,701 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-18 11:47:45,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:45,702 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [300321441] [2020-04-18 11:47:45,703 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,704 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 11:47:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 11:47:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,705 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:45,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,705 INFO L82 PathProgramCache]: Analyzing trace with hash 235305767, now seen corresponding path program 2 times [2020-04-18 11:47:45,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743584958] [2020-04-18 11:47:45,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:45,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743584958] [2020-04-18 11:47:45,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:45,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:45,844 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:45,846 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,850 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 18 transitions. [2020-04-18 11:47:45,850 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:45,885 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:45,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:47:45,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:47:45,886 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-04-18 11:47:45,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,918 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 11:47:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 11:47:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,919 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 3 times [2020-04-18 11:47:45,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641256042] [2020-04-18 11:47:45,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641256042] [2020-04-18 11:47:46,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:46,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:47:46,031 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,032 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,036 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 11:47:46,036 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,049 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:47:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:47:46,049 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 5 states. [2020-04-18 11:47:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,075 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 11:47:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 11:47:46,076 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:46,077 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [300321441] [2020-04-18 11:47:46,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:46,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 11:47:46,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [300321441] [2020-04-18 11:47:46,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 11:47:46,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:46,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:47:46,079 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 6 states. [2020-04-18 11:47:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,229 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-18 11:47:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 11:47:46,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 11:47:46,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:46,231 INFO L225 Difference]: With dead ends: 80 [2020-04-18 11:47:46,231 INFO L226 Difference]: Without dead ends: 75 [2020-04-18 11:47:46,233 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-18 11:47:46,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-18 11:47:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-18 11:47:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-18 11:47:46,242 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-18 11:47:46,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:46,244 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-18 11:47:46,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 11:47:46,244 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-18 11:47:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:46,245 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:46,245 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:46,245 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,246 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-18 11:47:46,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:46,246 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1690402632] [2020-04-18 11:47:46,247 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,247 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 11:47:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-04-18 11:47:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:46,248 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:46,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,249 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 2 times [2020-04-18 11:47:46,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992428146] [2020-04-18 11:47:46,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992428146] [2020-04-18 11:47:46,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:46,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:47:46,358 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,359 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,360 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 12 transitions. [2020-04-18 11:47:46,361 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,417 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:46,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:46,418 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 6 states. [2020-04-18 11:47:46,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,444 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2020-04-18 11:47:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-04-18 11:47:46,445 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:46,445 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1690402632] [2020-04-18 11:47:46,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:46,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 11:47:46,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1690402632] [2020-04-18 11:47:46,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 11:47:46,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:46,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:47:46,447 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 6 states. [2020-04-18 11:47:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,495 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-04-18 11:47:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 11:47:46,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 11:47:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:46,498 INFO L225 Difference]: With dead ends: 83 [2020-04-18 11:47:46,498 INFO L226 Difference]: Without dead ends: 77 [2020-04-18 11:47:46,498 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:47:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-18 11:47:46,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-04-18 11:47:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-18 11:47:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-18 11:47:46,508 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-18 11:47:46,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:46,508 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-18 11:47:46,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 11:47:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-18 11:47:46,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,510 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:46,510 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:46,510 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 4 times [2020-04-18 11:47:46,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:46,511 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1666278880] [2020-04-18 11:47:46,511 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,512 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 33 transitions. [2020-04-18 11:47:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 11:47:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,513 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1295455160, now seen corresponding path program 5 times [2020-04-18 11:47:46,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913717129] [2020-04-18 11:47:46,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:47:46,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913717129] [2020-04-18 11:47:46,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:46,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:46,575 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,575 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,577 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:46,578 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,610 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 11:47:46,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:46,611 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-04-18 11:47:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,655 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2020-04-18 11:47:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2020-04-18 11:47:46,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,656 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1294792070, now seen corresponding path program 6 times [2020-04-18 11:47:46,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553445351] [2020-04-18 11:47:46,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553445351] [2020-04-18 11:47:46,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186354507] [2020-04-18 11:47:46,765 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 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 [2020-04-18 11:47:46,837 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:46,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:46,840 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 11:47:46,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:46,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:46,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-04-18 11:47:46,901 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,901 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,903 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2020-04-18 11:47:46,903 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,955 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:46,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:47:46,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:46,956 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2020-04-18 11:47:47,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:47,051 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 11:47:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 11:47:47,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:47,052 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:47,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 7 times [2020-04-18 11:47:47,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:47,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998958194] [2020-04-18 11:47:47,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:47,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998958194] [2020-04-18 11:47:47,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702204718] [2020-04-18 11:47:47,119 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 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 [2020-04-18 11:47:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:47,163 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:47:47,164 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:47,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:47,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:47,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-18 11:47:47,226 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:47,227 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:47,228 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:47,228 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:47,264 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:47:47,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:47:47,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:47:47,265 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 10 states. [2020-04-18 11:47:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:47,329 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 11:47:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 11:47:47,330 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:47,331 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1666278880] [2020-04-18 11:47:47,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:47,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:47,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1666278880] [2020-04-18 11:47:47,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 11:47:47,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:47,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:47,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:47:47,332 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 12 states. [2020-04-18 11:47:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:47,573 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-18 11:47:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:47:47,577 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 11:47:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:47,578 INFO L225 Difference]: With dead ends: 101 [2020-04-18 11:47:47,579 INFO L226 Difference]: Without dead ends: 96 [2020-04-18 11:47:47,579 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:47:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-18 11:47:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-18 11:47:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-18 11:47:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-18 11:47:47,601 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-18 11:47:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:47,602 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-18 11:47:47,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 11:47:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-18 11:47:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:47,603 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:47,603 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:48,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:48,005 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:48,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-18 11:47:48,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:48,006 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [268667033] [2020-04-18 11:47:48,007 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,008 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-04-18 11:47:48,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:48,008 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 4 times [2020-04-18 11:47:48,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8669846] [2020-04-18 11:47:48,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8669846] [2020-04-18 11:47:48,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078977432] [2020-04-18 11:47:48,133 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 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 [2020-04-18 11:47:48,175 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:47:48,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:48,176 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:47:48,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:48,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-18 11:47:48,251 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:48,252 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,253 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 15 transitions. [2020-04-18 11:47:48,254 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:48,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:48,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,376 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:48,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:48,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:47:48,377 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 12 states. [2020-04-18 11:47:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,440 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2020-04-18 11:47:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2020-04-18 11:47:48,440 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:48,441 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [268667033] [2020-04-18 11:47:48,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:48,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:48,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [268667033] [2020-04-18 11:47:48,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 11:47:48,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:48,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:48,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:48,443 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 12 states. [2020-04-18 11:47:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,509 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-04-18 11:47:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 11:47:48,510 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 11:47:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:48,511 INFO L225 Difference]: With dead ends: 104 [2020-04-18 11:47:48,511 INFO L226 Difference]: Without dead ends: 98 [2020-04-18 11:47:48,512 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-18 11:47:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-04-18 11:47:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-18 11:47:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-04-18 11:47:48,520 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 9 [2020-04-18 11:47:48,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:48,520 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-04-18 11:47:48,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 11:47:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-04-18 11:47:48,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,521 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:48,522 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:48,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:48,731 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-18 11:47:48,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:48,732 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1374278370] [2020-04-18 11:47:48,733 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,735 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 66 transitions. [2020-04-18 11:47:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 11:47:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,737 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 2 times [2020-04-18 11:47:48,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480631566] [2020-04-18 11:47:48,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480631566] [2020-04-18 11:47:48,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:48,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:48,804 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:48,804 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,807 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-04-18 11:47:48,807 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:48,843 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:48,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:48,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:48,844 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-04-18 11:47:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,895 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2020-04-18 11:47:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 79 transitions. [2020-04-18 11:47:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,896 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 3 times [2020-04-18 11:47:48,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964317677] [2020-04-18 11:47:48,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964317677] [2020-04-18 11:47:48,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:48,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:48,963 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:48,964 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,966 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:48,966 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:48,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,994 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:48,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:47:48,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:47:48,995 INFO L87 Difference]: Start difference. First operand 45 states and 79 transitions. Second operand 7 states. [2020-04-18 11:47:49,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:49,068 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2020-04-18 11:47:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 83 transitions. [2020-04-18 11:47:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:49,068 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-18 11:47:49,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:49,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071060571] [2020-04-18 11:47:49,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071060571] [2020-04-18 11:47:49,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:49,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:49,123 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:49,124 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,126 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 11:47:49,126 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:49,160 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:47:49,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:49,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:47:49,161 INFO L87 Difference]: Start difference. First operand 50 states and 83 transitions. Second operand 6 states. [2020-04-18 11:47:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:49,233 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2020-04-18 11:47:49,233 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2020-04-18 11:47:49,233 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:49,234 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1374278370] [2020-04-18 11:47:49,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:49,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:49,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1374278370] [2020-04-18 11:47:49,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 11:47:49,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:49,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:49,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:47:49,235 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 11 states. [2020-04-18 11:47:49,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:49,328 INFO L93 Difference]: Finished difference Result 124 states and 288 transitions. [2020-04-18 11:47:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 11:47:49,329 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-18 11:47:49,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:49,330 INFO L225 Difference]: With dead ends: 124 [2020-04-18 11:47:49,330 INFO L226 Difference]: Without dead ends: 119 [2020-04-18 11:47:49,330 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:47:49,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-18 11:47:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-04-18 11:47:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-18 11:47:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 210 transitions. [2020-04-18 11:47:49,339 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 210 transitions. Word has length 10 [2020-04-18 11:47:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:49,339 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 210 transitions. [2020-04-18 11:47:49,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 11:47:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 210 transitions. [2020-04-18 11:47:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:49,340 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:49,340 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:49,341 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:49,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 5 times [2020-04-18 11:47:49,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:49,341 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1268241626] [2020-04-18 11:47:49,342 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,343 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-04-18 11:47:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:49,343 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-18 11:47:49,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:49,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659291191] [2020-04-18 11:47:49,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659291191] [2020-04-18 11:47:49,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030368088] [2020-04-18 11:47:49,432 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:49,492 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:49,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:49,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:49,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:49,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:49,589 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:49,590 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,591 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 11:47:49,591 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:49,642 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,859 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:47:49,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:47:49,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:47:49,860 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 16 states. [2020-04-18 11:47:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:50,013 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2020-04-18 11:47:50,013 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-04-18 11:47:50,013 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:50,014 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1268241626] [2020-04-18 11:47:50,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:50,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:50,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1268241626] [2020-04-18 11:47:50,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 11:47:50,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:50,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:47:50,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:50,015 INFO L87 Difference]: Start difference. First operand 87 states and 210 transitions. Second operand 16 states. [2020-04-18 11:47:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:50,112 INFO L93 Difference]: Finished difference Result 122 states and 292 transitions. [2020-04-18 11:47:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 11:47:50,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2020-04-18 11:47:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:50,114 INFO L225 Difference]: With dead ends: 122 [2020-04-18 11:47:50,114 INFO L226 Difference]: Without dead ends: 116 [2020-04-18 11:47:50,115 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-18 11:47:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-04-18 11:47:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-18 11:47:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-04-18 11:47:50,123 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 10 [2020-04-18 11:47:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:50,123 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-04-18 11:47:50,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 11:47:50,123 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-04-18 11:47:50,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:50,124 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:50,124 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:50,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:50,328 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:50,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-18 11:47:50,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:50,330 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [51928426] [2020-04-18 11:47:50,330 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:50,331 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 91 transitions. [2020-04-18 11:47:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-04-18 11:47:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:50,332 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:50,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 6 times [2020-04-18 11:47:50,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:50,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536578459] [2020-04-18 11:47:50,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536578459] [2020-04-18 11:47:50,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293975764] [2020-04-18 11:47:50,414 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 11:47:50,460 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:50,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:50,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:50,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:50,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:50,561 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:50,562 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:50,564 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 28 transitions. [2020-04-18 11:47:50,564 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:50,665 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:47:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:50,665 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 11 states. [2020-04-18 11:47:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:50,766 INFO L93 Difference]: Finished difference Result 62 states and 117 transitions. [2020-04-18 11:47:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 117 transitions. [2020-04-18 11:47:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:50,766 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 7 times [2020-04-18 11:47:50,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:50,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156180916] [2020-04-18 11:47:50,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156180916] [2020-04-18 11:47:50,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998881173] [2020-04-18 11:47:50,869 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 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 [2020-04-18 11:47:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:50,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:51,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:51,012 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:51,013 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:51,015 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 11:47:51,015 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:51,070 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:51,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:51,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:51,072 INFO L87 Difference]: Start difference. First operand 62 states and 117 transitions. Second operand 11 states. [2020-04-18 11:47:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:51,209 INFO L93 Difference]: Finished difference Result 70 states and 127 transitions. [2020-04-18 11:47:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 127 transitions. [2020-04-18 11:47:51,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:51,210 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:51,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 8 times [2020-04-18 11:47:51,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:51,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111395273] [2020-04-18 11:47:51,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111395273] [2020-04-18 11:47:51,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66556716] [2020-04-18 11:47:51,298 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 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 [2020-04-18 11:47:51,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:51,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:51,355 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:47:51,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:51,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-18 11:47:51,396 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:51,397 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:51,399 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:47:51,399 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:51,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:51,460 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:47:51,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:47:51,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:47:51,461 INFO L87 Difference]: Start difference. First operand 70 states and 127 transitions. Second operand 9 states. [2020-04-18 11:47:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:51,632 INFO L93 Difference]: Finished difference Result 81 states and 141 transitions. [2020-04-18 11:47:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-04-18 11:47:51,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:51,633 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:47:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:51,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 9 times [2020-04-18 11:47:51,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:51,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657580645] [2020-04-18 11:47:51,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657580645] [2020-04-18 11:47:51,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482955255] [2020-04-18 11:47:51,726 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 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 [2020-04-18 11:47:51,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:47:51,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:51,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:51,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:51,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:51,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:51,844 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:51,845 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:51,847 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-04-18 11:47:51,847 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:51,938 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:47:51,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:51,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:47:51,939 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 11 states. [2020-04-18 11:47:52,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:52,227 INFO L93 Difference]: Finished difference Result 90 states and 146 transitions. [2020-04-18 11:47:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 146 transitions. [2020-04-18 11:47:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:52,228 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:47:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 10 times [2020-04-18 11:47:52,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:52,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597909360] [2020-04-18 11:47:52,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:52,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597909360] [2020-04-18 11:47:52,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109878374] [2020-04-18 11:47:52,301 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 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 [2020-04-18 11:47:52,360 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:47:52,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:52,361 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:52,362 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:52,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:52,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:52,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:52,418 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:52,419 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:52,421 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2020-04-18 11:47:52,421 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:52,544 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:52,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:52,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:47:52,546 INFO L87 Difference]: Start difference. First operand 90 states and 146 transitions. Second operand 11 states. [2020-04-18 11:47:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:52,828 INFO L93 Difference]: Finished difference Result 97 states and 149 transitions. [2020-04-18 11:47:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 149 transitions. [2020-04-18 11:47:52,828 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:52,829 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [51928426] [2020-04-18 11:47:52,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:52,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:52,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [51928426] [2020-04-18 11:47:52,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 11:47:52,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:52,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:47:52,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1184, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 11:47:52,832 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 28 states. [2020-04-18 11:47:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:53,274 INFO L93 Difference]: Finished difference Result 217 states and 499 transitions. [2020-04-18 11:47:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 11:47:53,274 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 11 [2020-04-18 11:47:53,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:53,281 INFO L225 Difference]: With dead ends: 217 [2020-04-18 11:47:53,281 INFO L226 Difference]: Without dead ends: 198 [2020-04-18 11:47:53,283 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1573, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 11:47:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-04-18 11:47:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 107. [2020-04-18 11:47:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-04-18 11:47:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 271 transitions. [2020-04-18 11:47:53,301 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 271 transitions. Word has length 11 [2020-04-18 11:47:53,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:53,303 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 271 transitions. [2020-04-18 11:47:53,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 11:47:53,303 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 271 transitions. [2020-04-18 11:47:53,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:53,304 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:53,304 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:54,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:54,306 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:54,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 11 times [2020-04-18 11:47:54,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:54,307 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [911531104] [2020-04-18 11:47:54,309 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:54,310 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 87 transitions. [2020-04-18 11:47:54,310 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 11:47:54,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:54,311 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 12 times [2020-04-18 11:47:54,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:54,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402852554] [2020-04-18 11:47:54,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402852554] [2020-04-18 11:47:54,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255028687] [2020-04-18 11:47:54,400 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 11:47:54,455 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:54,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:54,456 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:54,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:54,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:54,530 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:54,530 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:54,532 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:54,532 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:54,618 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:47:54,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:54,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:54,620 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 11 states. [2020-04-18 11:47:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:54,767 INFO L93 Difference]: Finished difference Result 61 states and 115 transitions. [2020-04-18 11:47:54,767 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 115 transitions. [2020-04-18 11:47:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:54,768 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:54,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:54,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 13 times [2020-04-18 11:47:54,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:54,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031186833] [2020-04-18 11:47:54,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031186833] [2020-04-18 11:47:54,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812237550] [2020-04-18 11:47:54,861 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:54,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:54,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:54,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:54,985 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:54,986 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:54,988 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-04-18 11:47:54,988 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:55,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:55,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,076 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,118 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:55,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:55,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:55,120 INFO L87 Difference]: Start difference. First operand 61 states and 115 transitions. Second operand 13 states. [2020-04-18 11:47:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:55,342 INFO L93 Difference]: Finished difference Result 71 states and 126 transitions. [2020-04-18 11:47:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2020-04-18 11:47:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:55,342 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:55,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 14 times [2020-04-18 11:47:55,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:55,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120576597] [2020-04-18 11:47:55,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:55,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120576597] [2020-04-18 11:47:55,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368017049] [2020-04-18 11:47:55,422 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:55,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:55,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:55,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:55,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:55,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:55,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:55,540 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:55,541 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:55,542 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 11:47:55,542 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:55,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,651 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 11:47:55,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:47:55,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:47:55,652 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand 14 states. [2020-04-18 11:47:55,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:55,908 INFO L93 Difference]: Finished difference Result 79 states and 134 transitions. [2020-04-18 11:47:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 134 transitions. [2020-04-18 11:47:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:55,909 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:47:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:55,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 15 times [2020-04-18 11:47:55,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:55,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015664413] [2020-04-18 11:47:55,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:55,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015664413] [2020-04-18 11:47:55,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960259183] [2020-04-18 11:47:55,991 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:56,053 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:47:56,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:56,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:56,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:56,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:56,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:56,108 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:56,109 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:56,111 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 11:47:56,111 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:56,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:56,166 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:56,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:56,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-18 11:47:56,168 INFO L87 Difference]: Start difference. First operand 79 states and 134 transitions. Second operand 12 states. [2020-04-18 11:47:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:56,436 INFO L93 Difference]: Finished difference Result 80 states and 134 transitions. [2020-04-18 11:47:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2020-04-18 11:47:56,436 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:56,437 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [911531104] [2020-04-18 11:47:56,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:56,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:56,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [911531104] [2020-04-18 11:47:56,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 11:47:56,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:56,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 11:47:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:47:56,439 INFO L87 Difference]: Start difference. First operand 107 states and 271 transitions. Second operand 23 states. [2020-04-18 11:47:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:56,582 INFO L93 Difference]: Finished difference Result 153 states and 367 transitions. [2020-04-18 11:47:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:47:56,582 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 11 [2020-04-18 11:47:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:56,585 INFO L225 Difference]: With dead ends: 153 [2020-04-18 11:47:56,585 INFO L226 Difference]: Without dead ends: 148 [2020-04-18 11:47:56,586 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:47:56,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-18 11:47:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2020-04-18 11:47:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-18 11:47:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 273 transitions. [2020-04-18 11:47:56,592 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 273 transitions. Word has length 11 [2020-04-18 11:47:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:56,593 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 273 transitions. [2020-04-18 11:47:56,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 11:47:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 273 transitions. [2020-04-18 11:47:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:56,594 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:56,594 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:57,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:57,400 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:57,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:57,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 7 times [2020-04-18 11:47:57,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:57,401 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1827578729] [2020-04-18 11:47:57,401 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:57,402 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 11:47:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 11:47:57,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:57,403 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:57,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 8 times [2020-04-18 11:47:57,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:57,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388336910] [2020-04-18 11:47:57,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:57,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388336910] [2020-04-18 11:47:57,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626817245] [2020-04-18 11:47:57,524 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 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 [2020-04-18 11:47:57,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:57,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:57,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:57,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:57,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:57,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:57,660 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:57,660 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:57,662 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 11:47:57,662 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:57,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:57,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:57,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,987 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 11:47:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:47:57,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:47:57,988 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 20 states. [2020-04-18 11:47:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:58,195 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2020-04-18 11:47:58,195 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2020-04-18 11:47:58,195 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:58,196 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1827578729] [2020-04-18 11:47:58,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:58,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:47:58,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1827578729] [2020-04-18 11:47:58,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 11:47:58,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:58,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:47:58,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:47:58,198 INFO L87 Difference]: Start difference. First operand 110 states and 273 transitions. Second operand 20 states. [2020-04-18 11:47:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:58,304 INFO L93 Difference]: Finished difference Result 158 states and 382 transitions. [2020-04-18 11:47:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 11:47:58,305 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 11 [2020-04-18 11:47:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:58,309 INFO L225 Difference]: With dead ends: 158 [2020-04-18 11:47:58,310 INFO L226 Difference]: Without dead ends: 152 [2020-04-18 11:47:58,310 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:47:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-04-18 11:47:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2020-04-18 11:47:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-18 11:47:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-04-18 11:47:58,325 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 11 [2020-04-18 11:47:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:58,325 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-04-18 11:47:58,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 11:47:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-04-18 11:47:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:58,326 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:58,326 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:58,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:58,530 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:58,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:58,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 16 times [2020-04-18 11:47:58,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:58,531 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1049330536] [2020-04-18 11:47:58,532 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:58,533 INFO L259 McrAutomatonBuilder]: Finished intersection with 57 states and 116 transitions. [2020-04-18 11:47:58,533 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-04-18 11:47:58,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:58,534 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:58,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 17 times [2020-04-18 11:47:58,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:58,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68084817] [2020-04-18 11:47:58,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68084817] [2020-04-18 11:47:58,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684187205] [2020-04-18 11:47:58,602 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:58,652 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:58,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:58,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:58,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:58,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:58,741 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:58,741 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:58,743 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 11:47:58,743 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:58,863 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:58,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:58,864 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 13 states. [2020-04-18 11:47:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:59,038 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2020-04-18 11:47:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2020-04-18 11:47:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:59,038 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:59,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:59,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 18 times [2020-04-18 11:47:59,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:59,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705656149] [2020-04-18 11:47:59,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705656149] [2020-04-18 11:47:59,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21243943] [2020-04-18 11:47:59,135 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:59,177 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:59,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:59,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:59,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:59,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:59,304 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:59,305 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:59,307 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:47:59,307 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:59,350 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:47:59,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:59,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:47:59,351 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand 13 states. [2020-04-18 11:47:59,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:59,535 INFO L93 Difference]: Finished difference Result 93 states and 178 transitions. [2020-04-18 11:47:59,535 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 178 transitions. [2020-04-18 11:47:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:59,535 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:59,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 19 times [2020-04-18 11:47:59,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:59,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570530085] [2020-04-18 11:47:59,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570530085] [2020-04-18 11:47:59,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417785932] [2020-04-18 11:47:59,639 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:59,693 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:59,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:59,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:59,789 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:59,790 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:59,792 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 11:47:59,792 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:59,839 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:47:59,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:59,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:59,840 INFO L87 Difference]: Start difference. First operand 93 states and 178 transitions. Second operand 13 states. [2020-04-18 11:48:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:00,073 INFO L93 Difference]: Finished difference Result 101 states and 188 transitions. [2020-04-18 11:48:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 188 transitions. [2020-04-18 11:48:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:00,074 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:48:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:00,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 20 times [2020-04-18 11:48:00,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:00,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852295731] [2020-04-18 11:48:00,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:00,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852295731] [2020-04-18 11:48:00,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060730583] [2020-04-18 11:48:00,182 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:00,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:00,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:00,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:48:00,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:00,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:00,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-18 11:48:00,246 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:00,247 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:00,249 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 40 transitions. [2020-04-18 11:48:00,249 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:00,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:00,307 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 11:48:00,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:48:00,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:48:00,308 INFO L87 Difference]: Start difference. First operand 101 states and 188 transitions. Second operand 10 states. [2020-04-18 11:48:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:00,505 INFO L93 Difference]: Finished difference Result 119 states and 214 transitions. [2020-04-18 11:48:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 214 transitions. [2020-04-18 11:48:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:00,506 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:48:00,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:00,507 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 21 times [2020-04-18 11:48:00,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:00,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171372036] [2020-04-18 11:48:00,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:00,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171372036] [2020-04-18 11:48:00,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925210525] [2020-04-18 11:48:00,589 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:00,639 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:48:00,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:00,640 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:00,642 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:00,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:00,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:00,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:00,748 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:00,749 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:00,750 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:48:00,751 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:00,905 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:48:00,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:48:00,906 INFO L87 Difference]: Start difference. First operand 119 states and 214 transitions. Second operand 13 states. [2020-04-18 11:48:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:01,535 INFO L93 Difference]: Finished difference Result 136 states and 231 transitions. [2020-04-18 11:48:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 231 transitions. [2020-04-18 11:48:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:01,536 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:01,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:01,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 22 times [2020-04-18 11:48:01,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:01,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611207013] [2020-04-18 11:48:01,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:01,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611207013] [2020-04-18 11:48:01,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510174084] [2020-04-18 11:48:01,608 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:01,660 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:01,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:01,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:01,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:01,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:01,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:01,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:01,754 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:01,755 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:01,757 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 11:48:01,757 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:01,918 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:01,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:01,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1222, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 11:48:01,920 INFO L87 Difference]: Start difference. First operand 136 states and 231 transitions. Second operand 13 states. [2020-04-18 11:48:02,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:02,459 INFO L93 Difference]: Finished difference Result 152 states and 241 transitions. [2020-04-18 11:48:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 241 transitions. [2020-04-18 11:48:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:02,461 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:02,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 23 times [2020-04-18 11:48:02,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:02,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918550583] [2020-04-18 11:48:02,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:02,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918550583] [2020-04-18 11:48:02,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57432826] [2020-04-18 11:48:02,538 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:02,588 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:02,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:02,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:02,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:02,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:02,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:02,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:02,653 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:02,654 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:02,655 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:02,655 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:02,955 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:02,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:02,957 INFO L87 Difference]: Start difference. First operand 152 states and 241 transitions. Second operand 13 states. [2020-04-18 11:48:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:03,349 INFO L93 Difference]: Finished difference Result 164 states and 248 transitions. [2020-04-18 11:48:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 248 transitions. [2020-04-18 11:48:03,349 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:03,350 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1049330536] [2020-04-18 11:48:03,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:03,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:48:03,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1049330536] [2020-04-18 11:48:03,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-18 11:48:03,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:03,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 11:48:03,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=3294, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 11:48:03,353 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand 41 states. [2020-04-18 11:48:04,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:04,253 INFO L93 Difference]: Finished difference Result 287 states and 662 transitions. [2020-04-18 11:48:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-04-18 11:48:04,254 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 12 [2020-04-18 11:48:04,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:04,256 INFO L225 Difference]: With dead ends: 287 [2020-04-18 11:48:04,256 INFO L226 Difference]: Without dead ends: 268 [2020-04-18 11:48:04,257 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 192 SyntacticMatches, 25 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1498, Invalid=4508, Unknown=0, NotChecked=0, Total=6006 [2020-04-18 11:48:04,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-18 11:48:04,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 131. [2020-04-18 11:48:04,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-04-18 11:48:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-04-18 11:48:04,264 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 12 [2020-04-18 11:48:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:04,264 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-04-18 11:48:04,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-18 11:48:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-04-18 11:48:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:04,265 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:04,265 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:05,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:05,672 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:05,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:05,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 24 times [2020-04-18 11:48:05,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:05,673 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [985701492] [2020-04-18 11:48:05,674 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:05,675 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 120 transitions. [2020-04-18 11:48:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 11:48:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:05,676 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:05,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 25 times [2020-04-18 11:48:05,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:05,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446498502] [2020-04-18 11:48:05,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:05,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446498502] [2020-04-18 11:48:05,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860303848] [2020-04-18 11:48:05,757 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 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 [2020-04-18 11:48:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:05,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:05,804 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:05,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:05,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:05,907 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:05,907 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:05,909 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 11:48:05,909 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:06,012 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:48:06,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:06,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:48:06,013 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 13 states. [2020-04-18 11:48:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:06,215 INFO L93 Difference]: Finished difference Result 84 states and 169 transitions. [2020-04-18 11:48:06,215 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 169 transitions. [2020-04-18 11:48:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:06,216 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:48:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:06,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 26 times [2020-04-18 11:48:06,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:06,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782431061] [2020-04-18 11:48:06,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:06,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782431061] [2020-04-18 11:48:06,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456664366] [2020-04-18 11:48:06,324 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 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 [2020-04-18 11:48:06,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:06,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:06,385 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:06,390 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:06,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:06,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:06,536 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:06,537 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:06,540 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 11:48:06,540 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:06,646 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:06,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:06,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:48:06,648 INFO L87 Difference]: Start difference. First operand 84 states and 169 transitions. Second operand 13 states. [2020-04-18 11:48:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:06,978 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2020-04-18 11:48:06,979 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2020-04-18 11:48:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:06,980 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:48:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:06,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 27 times [2020-04-18 11:48:06,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:06,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194059595] [2020-04-18 11:48:06,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:07,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194059595] [2020-04-18 11:48:07,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723950615] [2020-04-18 11:48:07,067 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 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 [2020-04-18 11:48:07,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:07,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:07,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:07,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:07,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:07,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:07,214 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:07,214 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:07,216 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 32 transitions. [2020-04-18 11:48:07,217 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:07,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:07,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:07,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:07,377 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:07,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:48:07,378 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand 15 states. [2020-04-18 11:48:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:07,787 INFO L93 Difference]: Finished difference Result 110 states and 201 transitions. [2020-04-18 11:48:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 201 transitions. [2020-04-18 11:48:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:07,788 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:48:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:07,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 28 times [2020-04-18 11:48:07,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:07,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423045524] [2020-04-18 11:48:07,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:07,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423045524] [2020-04-18 11:48:07,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389018734] [2020-04-18 11:48:07,870 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 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 [2020-04-18 11:48:07,916 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:07,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:07,917 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:07,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:08,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:08,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:08,001 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:08,002 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:08,003 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:08,003 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:08,053 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:08,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:08,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:48:08,055 INFO L87 Difference]: Start difference. First operand 110 states and 201 transitions. Second operand 13 states. [2020-04-18 11:48:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:08,263 INFO L93 Difference]: Finished difference Result 123 states and 221 transitions. [2020-04-18 11:48:08,263 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 221 transitions. [2020-04-18 11:48:08,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:08,264 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:48:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 29 times [2020-04-18 11:48:08,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:08,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128270654] [2020-04-18 11:48:08,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:08,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128270654] [2020-04-18 11:48:08,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589642884] [2020-04-18 11:48:08,385 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 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 [2020-04-18 11:48:08,433 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:08,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:08,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:08,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:08,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:08,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:08,508 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:08,509 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:08,511 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:08,511 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:08,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:08,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,574 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:08,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:08,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 11:48:08,576 INFO L87 Difference]: Start difference. First operand 123 states and 221 transitions. Second operand 15 states. [2020-04-18 11:48:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:09,038 INFO L93 Difference]: Finished difference Result 137 states and 239 transitions. [2020-04-18 11:48:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 239 transitions. [2020-04-18 11:48:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:09,039 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:09,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 30 times [2020-04-18 11:48:09,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:09,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831341783] [2020-04-18 11:48:09,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:09,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831341783] [2020-04-18 11:48:09,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492269096] [2020-04-18 11:48:09,121 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 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 [2020-04-18 11:48:09,166 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:09,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:09,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:09,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:09,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:09,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:09,264 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:09,265 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:09,267 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 11:48:09,268 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:09,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:09,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:09,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:09,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:09,432 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 17 times. [2020-04-18 11:48:09,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:09,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=1532, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 11:48:09,433 INFO L87 Difference]: Start difference. First operand 137 states and 239 transitions. Second operand 16 states. [2020-04-18 11:48:09,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:09,829 INFO L93 Difference]: Finished difference Result 156 states and 263 transitions. [2020-04-18 11:48:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 263 transitions. [2020-04-18 11:48:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:09,830 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:09,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:09,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 31 times [2020-04-18 11:48:09,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:09,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483309442] [2020-04-18 11:48:09,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:09,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483309442] [2020-04-18 11:48:09,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576855409] [2020-04-18 11:48:09,899 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 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 [2020-04-18 11:48:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:09,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:09,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:10,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:10,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:10,049 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:10,050 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:10,052 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-04-18 11:48:10,052 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:10,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:10,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:10,182 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:48:10,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:48:10,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=1956, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 11:48:10,184 INFO L87 Difference]: Start difference. First operand 156 states and 263 transitions. Second operand 14 states. [2020-04-18 11:48:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:10,689 INFO L93 Difference]: Finished difference Result 161 states and 267 transitions. [2020-04-18 11:48:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 267 transitions. [2020-04-18 11:48:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:10,690 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:48:10,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:10,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 32 times [2020-04-18 11:48:10,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:10,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564453081] [2020-04-18 11:48:10,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:10,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564453081] [2020-04-18 11:48:10,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927040957] [2020-04-18 11:48:10,755 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 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 [2020-04-18 11:48:10,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:10,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:10,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:10,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:10,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:10,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:10,948 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:10,949 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:10,954 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:10,954 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:11,060 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:11,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:11,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=2621, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:11,062 INFO L87 Difference]: Start difference. First operand 161 states and 267 transitions. Second operand 13 states. [2020-04-18 11:48:11,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:11,462 INFO L93 Difference]: Finished difference Result 173 states and 276 transitions. [2020-04-18 11:48:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 276 transitions. [2020-04-18 11:48:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:11,464 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:48:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:11,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 33 times [2020-04-18 11:48:11,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:11,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569212906] [2020-04-18 11:48:11,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:11,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569212906] [2020-04-18 11:48:11,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249388136] [2020-04-18 11:48:11,549 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 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 [2020-04-18 11:48:11,606 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:11,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:11,607 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:11,608 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:11,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:11,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:11,730 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:11,731 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:11,732 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2020-04-18 11:48:11,733 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:11,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:11,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:11,838 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:48:11,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:48:11,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1101, Invalid=3189, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 11:48:11,840 INFO L87 Difference]: Start difference. First operand 173 states and 276 transitions. Second operand 14 states. [2020-04-18 11:48:12,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:12,394 INFO L93 Difference]: Finished difference Result 184 states and 285 transitions. [2020-04-18 11:48:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 285 transitions. [2020-04-18 11:48:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:12,395 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:48:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:12,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 34 times [2020-04-18 11:48:12,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:12,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818283198] [2020-04-18 11:48:12,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:12,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818283198] [2020-04-18 11:48:12,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743301204] [2020-04-18 11:48:12,475 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 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 [2020-04-18 11:48:12,526 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:12,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:12,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:12,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:12,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:12,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:12,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:12,598 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:12,598 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:12,600 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:12,600 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:12,764 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:12,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:12,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=4356, Unknown=0, NotChecked=0, Total=5852 [2020-04-18 11:48:12,767 INFO L87 Difference]: Start difference. First operand 184 states and 285 transitions. Second operand 13 states. [2020-04-18 11:48:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:13,344 INFO L93 Difference]: Finished difference Result 193 states and 289 transitions. [2020-04-18 11:48:13,344 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 289 transitions. [2020-04-18 11:48:13,344 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:13,345 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [985701492] [2020-04-18 11:48:13,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:13,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:48:13,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [985701492] [2020-04-18 11:48:13,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-04-18 11:48:13,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:13,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-04-18 11:48:13,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=5503, Unknown=0, NotChecked=0, Total=7310 [2020-04-18 11:48:13,349 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 49 states. [2020-04-18 11:48:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:14,433 INFO L93 Difference]: Finished difference Result 283 states and 666 transitions. [2020-04-18 11:48:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 11:48:14,433 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 12 [2020-04-18 11:48:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:14,435 INFO L225 Difference]: With dead ends: 283 [2020-04-18 11:48:14,435 INFO L226 Difference]: Without dead ends: 263 [2020-04-18 11:48:14,437 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 265 SyntacticMatches, 24 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4836 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2594, Invalid=7912, Unknown=0, NotChecked=0, Total=10506 [2020-04-18 11:48:14,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-18 11:48:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 136. [2020-04-18 11:48:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-18 11:48:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 343 transitions. [2020-04-18 11:48:14,443 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 343 transitions. Word has length 12 [2020-04-18 11:48:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:14,443 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 343 transitions. [2020-04-18 11:48:14,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-04-18 11:48:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 343 transitions. [2020-04-18 11:48:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:14,444 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:14,444 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:16,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:16,449 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:16,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:16,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 9 times [2020-04-18 11:48:16,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:16,451 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1019228092] [2020-04-18 11:48:16,452 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:16,452 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 11:48:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-04-18 11:48:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:16,453 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 10 times [2020-04-18 11:48:16,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:16,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194763216] [2020-04-18 11:48:16,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:16,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194763216] [2020-04-18 11:48:16,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436981547] [2020-04-18 11:48:16,580 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:16,622 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:16,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:16,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:16,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:16,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:16,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:16,735 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:16,736 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:16,738 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 11:48:16,738 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:16,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:17,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,032 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,119 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 11:48:17,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:48:17,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:48:17,120 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 24 states. [2020-04-18 11:48:17,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:17,352 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2020-04-18 11:48:17,352 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2020-04-18 11:48:17,352 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:17,353 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1019228092] [2020-04-18 11:48:17,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:17,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:48:17,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1019228092] [2020-04-18 11:48:17,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 11:48:17,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:17,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:48:17,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:48:17,355 INFO L87 Difference]: Start difference. First operand 136 states and 343 transitions. Second operand 24 states. [2020-04-18 11:48:17,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:17,512 INFO L93 Difference]: Finished difference Result 199 states and 487 transitions. [2020-04-18 11:48:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 11:48:17,513 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2020-04-18 11:48:17,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:17,515 INFO L225 Difference]: With dead ends: 199 [2020-04-18 11:48:17,515 INFO L226 Difference]: Without dead ends: 193 [2020-04-18 11:48:17,516 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:48:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-18 11:48:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 146. [2020-04-18 11:48:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-18 11:48:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 374 transitions. [2020-04-18 11:48:17,522 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 374 transitions. Word has length 12 [2020-04-18 11:48:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:17,522 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 374 transitions. [2020-04-18 11:48:17,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 11:48:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 374 transitions. [2020-04-18 11:48:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:17,525 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:17,525 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:17,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:17,728 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:17,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 35 times [2020-04-18 11:48:17,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:17,730 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1613896655] [2020-04-18 11:48:17,730 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:17,731 INFO L259 McrAutomatonBuilder]: Finished intersection with 72 states and 153 transitions. [2020-04-18 11:48:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-04-18 11:48:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:17,732 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:17,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 36 times [2020-04-18 11:48:17,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:17,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186264659] [2020-04-18 11:48:17,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:17,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186264659] [2020-04-18 11:48:17,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527440735] [2020-04-18 11:48:17,816 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 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 [2020-04-18 11:48:17,864 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:17,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:17,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:17,865 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:17,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:17,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:17,986 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:17,987 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:17,989 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 32 transitions. [2020-04-18 11:48:17,989 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:18,126 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:48:18,127 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 15 states. [2020-04-18 11:48:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:18,420 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2020-04-18 11:48:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 223 transitions. [2020-04-18 11:48:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:18,421 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:48:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 37 times [2020-04-18 11:48:18,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:18,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312932360] [2020-04-18 11:48:18,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:18,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312932360] [2020-04-18 11:48:18,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267958922] [2020-04-18 11:48:18,528 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 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 [2020-04-18 11:48:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:18,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:18,567 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:18,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:18,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:18,696 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:18,697 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:18,698 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:48:18,698 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:18,806 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:48:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:18,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2020-04-18 11:48:18,807 INFO L87 Difference]: Start difference. First operand 107 states and 223 transitions. Second operand 15 states. [2020-04-18 11:48:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:19,224 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2020-04-18 11:48:19,224 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 240 transitions. [2020-04-18 11:48:19,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:19,225 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:48:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:19,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 38 times [2020-04-18 11:48:19,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:19,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905861966] [2020-04-18 11:48:19,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:19,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905861966] [2020-04-18 11:48:19,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96088747] [2020-04-18 11:48:19,327 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 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 [2020-04-18 11:48:19,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:19,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:19,377 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:19,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:19,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:19,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:19,470 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:19,470 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:19,472 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:19,472 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:19,564 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:19,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:19,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:48:19,565 INFO L87 Difference]: Start difference. First operand 119 states and 240 transitions. Second operand 15 states. [2020-04-18 11:48:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:19,936 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 11:48:19,936 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 11:48:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:19,936 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:48:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:19,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 39 times [2020-04-18 11:48:19,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:19,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790160576] [2020-04-18 11:48:19,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:20,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790160576] [2020-04-18 11:48:20,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40011554] [2020-04-18 11:48:20,046 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 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 [2020-04-18 11:48:20,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:20,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:20,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:20,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:20,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:20,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:20,197 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:20,198 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:20,200 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:48:20,200 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:20,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:20,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:20,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:20,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:20,406 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:20,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:20,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 11:48:20,407 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 11:48:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:20,946 INFO L93 Difference]: Finished difference Result 151 states and 280 transitions. [2020-04-18 11:48:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 280 transitions. [2020-04-18 11:48:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:20,947 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:48:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:20,947 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 40 times [2020-04-18 11:48:20,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:20,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912903269] [2020-04-18 11:48:20,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:21,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912903269] [2020-04-18 11:48:21,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384156268] [2020-04-18 11:48:21,079 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 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 [2020-04-18 11:48:21,122 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:21,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:21,123 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:21,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:21,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:21,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:21,227 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:21,227 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:21,229 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:48:21,229 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:21,299 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:48:21,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:21,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 11:48:21,300 INFO L87 Difference]: Start difference. First operand 151 states and 280 transitions. Second operand 15 states. [2020-04-18 11:48:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:21,605 INFO L93 Difference]: Finished difference Result 173 states and 321 transitions. [2020-04-18 11:48:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 321 transitions. [2020-04-18 11:48:21,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:21,606 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:21,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:21,607 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 41 times [2020-04-18 11:48:21,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:21,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62458255] [2020-04-18 11:48:21,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:21,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62458255] [2020-04-18 11:48:21,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474837907] [2020-04-18 11:48:21,715 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:21,758 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:21,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:21,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:21,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:30,125 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 11:48:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:30,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:30,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-18 11:48:30,129 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:30,130 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:30,132 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:48:30,133 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:32,384 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:32,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 11:48:32,384 INFO L87 Difference]: Start difference. First operand 173 states and 321 transitions. Second operand 15 states. [2020-04-18 11:48:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:32,775 INFO L93 Difference]: Finished difference Result 181 states and 330 transitions. [2020-04-18 11:48:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 330 transitions. [2020-04-18 11:48:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:32,776 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:32,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 42 times [2020-04-18 11:48:32,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:32,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111570102] [2020-04-18 11:48:32,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:32,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111570102] [2020-04-18 11:48:32,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554486527] [2020-04-18 11:48:32,875 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:32,924 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:32,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:32,925 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:32,926 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:33,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:33,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:33,057 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:33,058 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:33,060 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:48:33,061 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:33,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:33,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:33,140 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:33,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:33,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=1964, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 11:48:33,141 INFO L87 Difference]: Start difference. First operand 181 states and 330 transitions. Second operand 17 states. [2020-04-18 11:48:33,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:33,870 INFO L93 Difference]: Finished difference Result 204 states and 364 transitions. [2020-04-18 11:48:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 364 transitions. [2020-04-18 11:48:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:33,871 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:48:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 43 times [2020-04-18 11:48:33,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:33,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235603201] [2020-04-18 11:48:33,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:33,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235603201] [2020-04-18 11:48:33,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113865552] [2020-04-18 11:48:33,959 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:34,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:34,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:34,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:34,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:34,107 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:34,107 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:34,109 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:48:34,109 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:34,169 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:48:34,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:34,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=2498, Unknown=0, NotChecked=0, Total=3306 [2020-04-18 11:48:34,170 INFO L87 Difference]: Start difference. First operand 204 states and 364 transitions. Second operand 15 states. [2020-04-18 11:48:34,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:34,525 INFO L93 Difference]: Finished difference Result 213 states and 378 transitions. [2020-04-18 11:48:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 378 transitions. [2020-04-18 11:48:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:34,527 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:48:34,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:34,527 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 44 times [2020-04-18 11:48:34,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:34,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580896225] [2020-04-18 11:48:34,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:34,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580896225] [2020-04-18 11:48:34,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512461763] [2020-04-18 11:48:34,642 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:34,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:34,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:34,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:34,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:34,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:34,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:34,815 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:34,816 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:34,818 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:48:34,818 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:34,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:34,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:34,945 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:48:34,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:34,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=2673, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:34,947 INFO L87 Difference]: Start difference. First operand 213 states and 378 transitions. Second operand 17 states. [2020-04-18 11:48:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:35,675 INFO L93 Difference]: Finished difference Result 231 states and 400 transitions. [2020-04-18 11:48:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 400 transitions. [2020-04-18 11:48:35,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:35,676 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:48:35,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 45 times [2020-04-18 11:48:35,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:35,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435301923] [2020-04-18 11:48:35,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:35,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435301923] [2020-04-18 11:48:35,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369805926] [2020-04-18 11:48:35,788 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:35,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:48:35,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:35,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:35,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:35,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:35,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:35,970 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:35,971 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:35,974 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 43 transitions. [2020-04-18 11:48:35,974 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:36,022 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:36,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:36,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:36,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:36,165 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 11:48:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:48:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2020-04-18 11:48:36,167 INFO L87 Difference]: Start difference. First operand 231 states and 400 transitions. Second operand 18 states. [2020-04-18 11:48:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:36,705 INFO L93 Difference]: Finished difference Result 265 states and 451 transitions. [2020-04-18 11:48:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 451 transitions. [2020-04-18 11:48:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:36,706 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:48:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 46 times [2020-04-18 11:48:36,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:36,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829720653] [2020-04-18 11:48:36,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:36,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829720653] [2020-04-18 11:48:36,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508237754] [2020-04-18 11:48:36,801 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:36,843 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:36,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:36,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:36,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:43,047 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 11:48:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:43,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:43,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-18 11:48:43,049 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:43,051 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:43,053 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 11:48:43,053 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:43,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:43,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:05,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:21,829 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 14 times. [2020-04-18 11:49:21,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:21,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=4175, Unknown=11, NotChecked=0, Total=5550 [2020-04-18 11:49:21,830 INFO L87 Difference]: Start difference. First operand 265 states and 451 transitions. Second operand 17 states. [2020-04-18 11:49:22,629 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 12 [2020-04-18 11:49:27,508 WARN L192 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 25 DAG size of output: 10 [2020-04-18 11:49:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:34,535 INFO L93 Difference]: Finished difference Result 283 states and 476 transitions. [2020-04-18 11:49:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 476 transitions. [2020-04-18 11:49:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:34,536 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:49:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 47 times [2020-04-18 11:49:34,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:34,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562473682] [2020-04-18 11:49:34,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:34,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562473682] [2020-04-18 11:49:34,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469311098] [2020-04-18 11:49:34,615 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:34,654 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:34,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:34,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:34,656 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:34,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:34,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:34,761 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:34,762 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:34,764 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:49:34,764 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:34,863 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:34,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:34,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=5249, Unknown=12, NotChecked=0, Total=6972 [2020-04-18 11:49:34,865 INFO L87 Difference]: Start difference. First operand 283 states and 476 transitions. Second operand 15 states. [2020-04-18 11:49:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:35,684 INFO L93 Difference]: Finished difference Result 299 states and 494 transitions. [2020-04-18 11:49:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 494 transitions. [2020-04-18 11:49:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:35,685 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:49:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:35,686 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 48 times [2020-04-18 11:49:35,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:35,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306516314] [2020-04-18 11:49:35,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:35,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306516314] [2020-04-18 11:49:35,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787997086] [2020-04-18 11:49:35,785 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:35,826 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:49:35,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:35,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:35,827 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:35,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:35,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:35,936 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:35,937 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:35,938 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 11:49:35,938 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:36,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:36,115 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:49:36,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:36,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6706, Unknown=12, NotChecked=0, Total=8930 [2020-04-18 11:49:36,117 INFO L87 Difference]: Start difference. First operand 299 states and 494 transitions. Second operand 16 states. [2020-04-18 11:49:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:36,972 INFO L93 Difference]: Finished difference Result 308 states and 503 transitions. [2020-04-18 11:49:36,972 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 503 transitions. [2020-04-18 11:49:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:36,973 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:49:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:36,973 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 49 times [2020-04-18 11:49:36,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:36,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405526635] [2020-04-18 11:49:36,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:37,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405526635] [2020-04-18 11:49:37,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923205640] [2020-04-18 11:49:37,057 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:37,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:37,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:37,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:37,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:37,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:37,180 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:37,181 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:37,183 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:49:37,183 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:37,496 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:37,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:37,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2830, Invalid=8714, Unknown=12, NotChecked=0, Total=11556 [2020-04-18 11:49:37,497 INFO L87 Difference]: Start difference. First operand 308 states and 503 transitions. Second operand 15 states. [2020-04-18 11:49:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:40,708 INFO L93 Difference]: Finished difference Result 330 states and 529 transitions. [2020-04-18 11:49:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 529 transitions. [2020-04-18 11:49:40,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:40,709 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:49:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:40,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 50 times [2020-04-18 11:49:40,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:40,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647002424] [2020-04-18 11:49:40,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:40,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647002424] [2020-04-18 11:49:40,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158444449] [2020-04-18 11:49:40,796 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:40,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:40,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:40,841 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:40,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:40,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:40,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:40,961 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:40,962 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:40,963 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:49:40,963 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:41,036 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:49:41,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:41,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3561, Invalid=11433, Unknown=12, NotChecked=0, Total=15006 [2020-04-18 11:49:41,038 INFO L87 Difference]: Start difference. First operand 330 states and 529 transitions. Second operand 15 states. [2020-04-18 11:49:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:41,433 INFO L93 Difference]: Finished difference Result 341 states and 536 transitions. [2020-04-18 11:49:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 536 transitions. [2020-04-18 11:49:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:41,434 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 11:49:41,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:41,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 51 times [2020-04-18 11:49:41,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:41,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407554517] [2020-04-18 11:49:41,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:41,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407554517] [2020-04-18 11:49:41,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66827234] [2020-04-18 11:49:41,520 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:41,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:49:41,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:41,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:41,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:41,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:41,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:41,668 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:41,669 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:41,670 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:49:41,670 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:41,794 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:49:41,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:41,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3748, Invalid=12242, Unknown=12, NotChecked=0, Total=16002 [2020-04-18 11:49:41,796 INFO L87 Difference]: Start difference. First operand 341 states and 536 transitions. Second operand 15 states. [2020-04-18 11:49:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:42,409 INFO L93 Difference]: Finished difference Result 353 states and 545 transitions. [2020-04-18 11:49:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 545 transitions. [2020-04-18 11:49:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:42,410 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 11:49:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 52 times [2020-04-18 11:49:42,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:42,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064736937] [2020-04-18 11:49:42,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:42,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064736937] [2020-04-18 11:49:42,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919128989] [2020-04-18 11:49:42,479 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:42,521 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:42,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:42,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:42,523 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:42,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:42,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:42,635 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:42,636 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:42,637 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:49:42,638 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:42,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:42,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:42,809 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:49:42,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:42,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4198, Invalid=13880, Unknown=12, NotChecked=0, Total=18090 [2020-04-18 11:49:42,810 INFO L87 Difference]: Start difference. First operand 353 states and 545 transitions. Second operand 16 states. [2020-04-18 11:49:43,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:43,651 INFO L93 Difference]: Finished difference Result 365 states and 551 transitions. [2020-04-18 11:49:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 551 transitions. [2020-04-18 11:49:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:43,652 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 11:49:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:43,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 53 times [2020-04-18 11:49:43,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:43,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636651563] [2020-04-18 11:49:43,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:43,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636651563] [2020-04-18 11:49:43,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902768680] [2020-04-18 11:49:43,759 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:43,821 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:49:43,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:43,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:43,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:44,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:44,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:44,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:44,410 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:44,411 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:44,412 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:49:44,412 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:48,156 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:49:48,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:48,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4973, Invalid=16765, Unknown=18, NotChecked=0, Total=21756 [2020-04-18 11:49:48,157 INFO L87 Difference]: Start difference. First operand 365 states and 551 transitions. Second operand 15 states. [2020-04-18 11:49:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:49,658 INFO L93 Difference]: Finished difference Result 386 states and 564 transitions. [2020-04-18 11:49:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 564 transitions. [2020-04-18 11:49:49,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:49,659 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 11:49:49,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:49,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 54 times [2020-04-18 11:49:49,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:49,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499181347] [2020-04-18 11:49:49,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:49,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499181347] [2020-04-18 11:49:49,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212300014] [2020-04-18 11:49:49,727 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 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 [2020-04-18 11:49:49,771 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:49:49,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:49,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:49,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:49,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:49,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:49,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:49,873 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:49,874 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:49,875 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:49:49,876 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:50,225 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:49:50,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6200, Invalid=21838, Unknown=18, NotChecked=0, Total=28056 [2020-04-18 11:49:50,228 INFO L87 Difference]: Start difference. First operand 386 states and 564 transitions. Second operand 15 states. [2020-04-18 11:49:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:51,514 INFO L93 Difference]: Finished difference Result 401 states and 577 transitions. [2020-04-18 11:49:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 577 transitions. [2020-04-18 11:49:51,515 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:51,517 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1613896655] [2020-04-18 11:49:51,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:51,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:49:51,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1613896655] [2020-04-18 11:49:51,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-04-18 11:49:51,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:51,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-04-18 11:49:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7006, Invalid=25196, Unknown=18, NotChecked=0, Total=32220 [2020-04-18 11:49:51,519 INFO L87 Difference]: Start difference. First operand 146 states and 374 transitions. Second operand 89 states. [2020-04-18 11:50:02,937 WARN L192 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-04-18 11:50:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:29,842 INFO L93 Difference]: Finished difference Result 504 states and 1177 transitions. [2020-04-18 11:50:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-04-18 11:50:29,842 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 13 [2020-04-18 11:50:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:50:29,845 INFO L225 Difference]: With dead ends: 504 [2020-04-18 11:50:29,846 INFO L226 Difference]: Without dead ends: 456 [2020-04-18 11:50:29,848 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 576 SyntacticMatches, 75 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32705 ImplicationChecksByTransitivity, 66.8s TimeCoverageRelationStatistics Valid=13065, Invalid=48661, Unknown=26, NotChecked=0, Total=61752 [2020-04-18 11:50:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-04-18 11:50:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 172. [2020-04-18 11:50:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-18 11:50:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 470 transitions. [2020-04-18 11:50:29,857 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 470 transitions. Word has length 13 [2020-04-18 11:50:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:50:29,857 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 470 transitions. [2020-04-18 11:50:29,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-04-18 11:50:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 470 transitions. [2020-04-18 11:50:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:29,858 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:50:29,859 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:50:33,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:33,670 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:50:33,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:33,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 55 times [2020-04-18 11:50:33,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:50:33,673 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1324710668] [2020-04-18 11:50:33,673 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:33,674 INFO L259 McrAutomatonBuilder]: Finished intersection with 70 states and 149 transitions. [2020-04-18 11:50:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-04-18 11:50:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:33,675 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:50:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148993, now seen corresponding path program 56 times [2020-04-18 11:50:33,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:33,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708788158] [2020-04-18 11:50:33,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:33,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708788158] [2020-04-18 11:50:33,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053218685] [2020-04-18 11:50:33,752 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 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 [2020-04-18 11:50:33,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:33,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:33,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:33,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:33,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:33,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:33,916 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:33,917 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:33,919 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:50:33,919 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:34,059 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:50:34,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:50:34,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:50:34,060 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 15 states. [2020-04-18 11:50:34,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:34,353 INFO L93 Difference]: Finished difference Result 106 states and 221 transitions. [2020-04-18 11:50:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 221 transitions. [2020-04-18 11:50:34,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:34,354 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:50:34,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:34,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 57 times [2020-04-18 11:50:34,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:34,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496494021] [2020-04-18 11:50:34,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:34,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496494021] [2020-04-18 11:50:34,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017914020] [2020-04-18 11:50:34,454 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 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 [2020-04-18 11:50:34,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:50:34,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:34,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:34,517 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:34,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:34,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:34,614 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:34,615 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:34,617 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:50:34,617 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:34,721 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:50:34,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:50:34,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:50:34,722 INFO L87 Difference]: Start difference. First operand 106 states and 221 transitions. Second operand 15 states. [2020-04-18 11:50:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:35,095 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2020-04-18 11:50:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 239 transitions. [2020-04-18 11:50:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:35,096 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:50:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 58 times [2020-04-18 11:50:35,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:35,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380630761] [2020-04-18 11:50:35,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:35,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380630761] [2020-04-18 11:50:35,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033999400] [2020-04-18 11:50:35,172 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 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 [2020-04-18 11:50:35,212 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:35,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:35,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:35,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:35,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:35,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:35,680 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:35,680 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:35,682 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:50:35,682 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:35,797 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:50:35,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:50:35,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 11:50:35,798 INFO L87 Difference]: Start difference. First operand 117 states and 239 transitions. Second operand 15 states. [2020-04-18 11:50:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:36,240 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 11:50:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 11:50:36,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:36,241 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:50:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:36,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 59 times [2020-04-18 11:50:36,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:36,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860584870] [2020-04-18 11:50:36,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:36,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860584870] [2020-04-18 11:50:36,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800646180] [2020-04-18 11:50:36,355 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 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 [2020-04-18 11:50:36,398 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:50:36,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:36,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:36,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:37,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:37,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:37,012 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:37,013 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:37,015 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:50:37,015 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:37,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:37,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:37,228 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:50:37,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:37,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=1708, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 11:50:37,229 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 11:50:37,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:37,885 INFO L93 Difference]: Finished difference Result 156 states and 295 transitions. [2020-04-18 11:50:37,885 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 295 transitions. [2020-04-18 11:50:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:37,886 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:50:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:37,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 60 times [2020-04-18 11:50:37,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:37,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45837803] [2020-04-18 11:50:37,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:37,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45837803] [2020-04-18 11:50:37,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550186564] [2020-04-18 11:50:37,976 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 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 [2020-04-18 11:50:38,020 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:50:38,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:38,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:38,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:38,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:38,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:38,115 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:38,115 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:38,117 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:50:38,117 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:38,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:38,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:38,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:38,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:38,249 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:50:38,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=2478, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 11:50:38,250 INFO L87 Difference]: Start difference. First operand 156 states and 295 transitions. Second operand 17 states. [2020-04-18 11:50:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:38,822 INFO L93 Difference]: Finished difference Result 164 states and 302 transitions. [2020-04-18 11:50:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 302 transitions. [2020-04-18 11:50:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:38,823 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:50:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:38,824 INFO L82 PathProgramCache]: Analyzing trace with hash 9426703, now seen corresponding path program 61 times [2020-04-18 11:50:38,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:38,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155165692] [2020-04-18 11:50:38,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:38,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155165692] [2020-04-18 11:50:38,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097522131] [2020-04-18 11:50:38,932 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 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 [2020-04-18 11:50:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:38,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:38,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:39,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:39,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:39,083 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:39,083 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:39,085 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:50:39,085 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:39,144 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:50:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:50:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=3064, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 11:50:39,145 INFO L87 Difference]: Start difference. First operand 164 states and 302 transitions. Second operand 15 states. [2020-04-18 11:50:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:39,466 INFO L93 Difference]: Finished difference Result 182 states and 332 transitions. [2020-04-18 11:50:39,466 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 332 transitions. [2020-04-18 11:50:39,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:39,467 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:50:39,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:39,467 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 62 times [2020-04-18 11:50:39,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:39,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713860770] [2020-04-18 11:50:39,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:39,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713860770] [2020-04-18 11:50:39,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895258323] [2020-04-18 11:50:39,571 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 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 [2020-04-18 11:50:39,611 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:39,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:39,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:39,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:39,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:39,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:39,706 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:39,708 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:39,709 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:50:39,710 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:39,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:39,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:39,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:39,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:39,800 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:50:39,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:39,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 11:50:39,801 INFO L87 Difference]: Start difference. First operand 182 states and 332 transitions. Second operand 17 states. [2020-04-18 11:50:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:40,470 INFO L93 Difference]: Finished difference Result 201 states and 361 transitions. [2020-04-18 11:50:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 361 transitions. [2020-04-18 11:50:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:40,471 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:50:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:40,471 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 63 times [2020-04-18 11:50:40,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:40,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960398356] [2020-04-18 11:50:40,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:40,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960398356] [2020-04-18 11:50:40,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019826859] [2020-04-18 11:50:40,551 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 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 [2020-04-18 11:50:40,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:50:40,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:40,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:40,597 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:41,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:41,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:41,114 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:41,114 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:41,116 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:50:41,116 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:41,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:41,158 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:41,158 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:41,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:41,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:41,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:41,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:41,230 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:50:41,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:50:41,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=3978, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 11:50:41,231 INFO L87 Difference]: Start difference. First operand 201 states and 361 transitions. Second operand 19 states. [2020-04-18 11:50:42,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:42,299 INFO L93 Difference]: Finished difference Result 237 states and 410 transitions. [2020-04-18 11:50:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 410 transitions. [2020-04-18 11:50:42,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:42,299 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:50:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:42,300 INFO L82 PathProgramCache]: Analyzing trace with hash 646656193, now seen corresponding path program 64 times [2020-04-18 11:50:42,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:42,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9027386] [2020-04-18 11:50:42,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:42,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9027386] [2020-04-18 11:50:42,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679914032] [2020-04-18 11:50:42,374 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 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 [2020-04-18 11:50:42,415 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:42,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:42,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:42,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:42,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:42,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:42,510 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:42,511 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:42,513 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 39 transitions. [2020-04-18 11:50:42,513 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:42,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:42,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:42,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:42,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:42,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:42,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:42,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:42,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:42,768 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 19 times. [2020-04-18 11:50:42,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:50:42,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=5905, Unknown=0, NotChecked=0, Total=7656 [2020-04-18 11:50:42,770 INFO L87 Difference]: Start difference. First operand 237 states and 410 transitions. Second operand 20 states. [2020-04-18 11:50:43,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:43,428 INFO L93 Difference]: Finished difference Result 268 states and 455 transitions. [2020-04-18 11:50:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 455 transitions. [2020-04-18 11:50:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:43,429 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:50:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:43,429 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 65 times [2020-04-18 11:50:43,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:43,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655904413] [2020-04-18 11:50:43,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:43,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655904413] [2020-04-18 11:50:43,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304794062] [2020-04-18 11:50:43,534 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 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 [2020-04-18 11:50:43,603 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:43,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:43,604 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:43,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:43,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:43,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:43,763 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:43,765 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:43,768 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:50:43,768 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:43,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:43,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:43,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:43,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:44,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:44,134 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 11:50:44,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:50:44,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2112, Invalid=7200, Unknown=0, NotChecked=0, Total=9312 [2020-04-18 11:50:44,135 INFO L87 Difference]: Start difference. First operand 268 states and 455 transitions. Second operand 18 states. [2020-04-18 11:50:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:45,004 INFO L93 Difference]: Finished difference Result 284 states and 475 transitions. [2020-04-18 11:50:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 475 transitions. [2020-04-18 11:50:45,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:45,005 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:50:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:45,006 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 66 times [2020-04-18 11:50:45,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:45,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380611439] [2020-04-18 11:50:45,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:45,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380611439] [2020-04-18 11:50:45,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117824354] [2020-04-18 11:50:45,088 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 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 [2020-04-18 11:50:45,133 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:50:45,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:45,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:45,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:45,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:45,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:45,240 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:45,241 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:45,243 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 11:50:45,243 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:45,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:45,483 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:50:45,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:50:45,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2601, Invalid=8955, Unknown=0, NotChecked=0, Total=11556 [2020-04-18 11:50:45,484 INFO L87 Difference]: Start difference. First operand 284 states and 475 transitions. Second operand 16 states. [2020-04-18 11:50:46,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:46,391 INFO L93 Difference]: Finished difference Result 303 states and 492 transitions. [2020-04-18 11:50:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 492 transitions. [2020-04-18 11:50:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:46,393 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:50:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 67 times [2020-04-18 11:50:46,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:46,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459433163] [2020-04-18 11:50:46,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:46,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459433163] [2020-04-18 11:50:46,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462193881] [2020-04-18 11:50:46,500 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 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 [2020-04-18 11:50:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:46,557 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:46,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:47,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:47,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:47,276 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:47,277 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:47,278 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:50:47,278 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:47,358 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:50:47,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:50:47,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3020, Invalid=10552, Unknown=0, NotChecked=0, Total=13572 [2020-04-18 11:50:47,359 INFO L87 Difference]: Start difference. First operand 303 states and 492 transitions. Second operand 15 states. [2020-04-18 11:50:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:48,059 INFO L93 Difference]: Finished difference Result 326 states and 515 transitions. [2020-04-18 11:50:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 515 transitions. [2020-04-18 11:50:48,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:48,061 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:50:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:48,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 68 times [2020-04-18 11:50:48,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:48,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192207223] [2020-04-18 11:50:48,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:48,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192207223] [2020-04-18 11:50:48,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078572150] [2020-04-18 11:50:48,159 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 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 [2020-04-18 11:50:48,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:48,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:48,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:48,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:48,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:48,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:48,295 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:48,296 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:48,297 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:50:48,297 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:48,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:48,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:48,454 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 11:50:48,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:48,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3356, Invalid=11896, Unknown=0, NotChecked=0, Total=15252 [2020-04-18 11:50:48,456 INFO L87 Difference]: Start difference. First operand 326 states and 515 transitions. Second operand 17 states. [2020-04-18 11:50:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:49,447 INFO L93 Difference]: Finished difference Result 350 states and 530 transitions. [2020-04-18 11:50:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 530 transitions. [2020-04-18 11:50:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:49,448 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:50:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 69 times [2020-04-18 11:50:49,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:49,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014303307] [2020-04-18 11:50:49,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:49,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014303307] [2020-04-18 11:50:49,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455505536] [2020-04-18 11:50:49,515 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 11:50:49,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:50:49,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:49,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:49,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:49,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:49,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:49,675 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:49,676 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:49,677 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:50:49,677 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:49,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:49,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:49,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:49,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:49,914 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:50:49,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:50:49,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3866, Invalid=14224, Unknown=0, NotChecked=0, Total=18090 [2020-04-18 11:50:49,916 INFO L87 Difference]: Start difference. First operand 350 states and 530 transitions. Second operand 18 states. [2020-04-18 11:50:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:50,984 INFO L93 Difference]: Finished difference Result 358 states and 536 transitions. [2020-04-18 11:50:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 536 transitions. [2020-04-18 11:50:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:50,985 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:50:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 70 times [2020-04-18 11:50:50,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:50,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978791432] [2020-04-18 11:50:50,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:51,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978791432] [2020-04-18 11:50:51,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653797813] [2020-04-18 11:50:51,058 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 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 [2020-04-18 11:50:51,102 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:51,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:51,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:50:51,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:51,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:51,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:50:51,186 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:51,187 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:51,189 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:50:51,189 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:51,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:51,431 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:50:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:50:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4526, Invalid=16644, Unknown=0, NotChecked=0, Total=21170 [2020-04-18 11:50:51,432 INFO L87 Difference]: Start difference. First operand 358 states and 536 transitions. Second operand 16 states. [2020-04-18 11:50:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:52,417 INFO L93 Difference]: Finished difference Result 359 states and 536 transitions. [2020-04-18 11:50:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 536 transitions. [2020-04-18 11:50:52,418 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:50:52,419 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1324710668] [2020-04-18 11:50:52,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:52,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:50:52,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1324710668] [2020-04-18 11:50:52,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-04-18 11:50:52,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:50:52,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-04-18 11:50:52,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4967, Invalid=18289, Unknown=0, NotChecked=0, Total=23256 [2020-04-18 11:50:52,421 INFO L87 Difference]: Start difference. First operand 172 states and 470 transitions. Second operand 80 states. [2020-04-18 11:50:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:55,635 INFO L93 Difference]: Finished difference Result 380 states and 911 transitions. [2020-04-18 11:50:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-04-18 11:50:55,635 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 13 [2020-04-18 11:50:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:50:55,637 INFO L225 Difference]: With dead ends: 380 [2020-04-18 11:50:55,638 INFO L226 Difference]: Without dead ends: 362 [2020-04-18 11:50:55,640 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 424 SyntacticMatches, 61 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20795 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=8391, Invalid=29439, Unknown=0, NotChecked=0, Total=37830 [2020-04-18 11:50:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-04-18 11:50:55,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 177. [2020-04-18 11:50:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-04-18 11:50:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 478 transitions. [2020-04-18 11:50:55,647 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 478 transitions. Word has length 13 [2020-04-18 11:50:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:50:55,647 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 478 transitions. [2020-04-18 11:50:55,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-04-18 11:50:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 478 transitions. [2020-04-18 11:50:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:55,648 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:50:55,648 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:50:58,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:58,659 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:50:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 11 times [2020-04-18 11:50:58,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:50:58,661 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1394781166] [2020-04-18 11:50:58,662 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:58,662 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 41 transitions. [2020-04-18 11:50:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-04-18 11:50:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:50:58,663 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:50:58,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:58,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 12 times [2020-04-18 11:50:58,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:58,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535505196] [2020-04-18 11:50:58,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-18 11:50:58,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535505196] [2020-04-18 11:50:58,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882133547] [2020-04-18 11:50:58,754 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 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 [2020-04-18 11:50:58,798 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 11:50:58,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:58,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:50:58,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:58,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:58,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2020-04-18 11:50:58,839 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:58,840 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:58,842 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 11:50:58,842 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:58,929 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:58,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:58,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:58,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:58,960 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 11:50:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:50:58,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:50:58,961 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 16 states. [2020-04-18 11:50:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:59,360 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2020-04-18 11:50:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2020-04-18 11:50:59,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:50:59,361 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1394781166] [2020-04-18 11:50:59,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:50:59,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 11:50:59,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1394781166] [2020-04-18 11:50:59,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 11:50:59,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:50:59,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:50:59,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:50:59,362 INFO L87 Difference]: Start difference. First operand 177 states and 478 transitions. Second operand 16 states. [2020-04-18 11:50:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:59,919 INFO L93 Difference]: Finished difference Result 362 states and 929 transitions. [2020-04-18 11:50:59,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-18 11:50:59,919 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-18 11:50:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:50:59,922 INFO L225 Difference]: With dead ends: 362 [2020-04-18 11:50:59,922 INFO L226 Difference]: Without dead ends: 313 [2020-04-18 11:50:59,923 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=1483, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 11:50:59,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-04-18 11:50:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 250. [2020-04-18 11:50:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-04-18 11:50:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 701 transitions. [2020-04-18 11:50:59,930 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 701 transitions. Word has length 13 [2020-04-18 11:50:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:50:59,931 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 701 transitions. [2020-04-18 11:50:59,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 11:50:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 701 transitions. [2020-04-18 11:50:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:59,932 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:50:59,932 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:51:00,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:00,135 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:51:00,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 71 times [2020-04-18 11:51:00,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:51:00,136 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2049926817] [2020-04-18 11:51:00,137 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:00,138 INFO L259 McrAutomatonBuilder]: Finished intersection with 86 states and 186 transitions. [2020-04-18 11:51:00,138 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-04-18 11:51:00,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:00,139 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:51:00,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:00,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 72 times [2020-04-18 11:51:00,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:00,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641579210] [2020-04-18 11:51:00,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:00,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641579210] [2020-04-18 11:51:00,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013421056] [2020-04-18 11:51:00,249 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 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 [2020-04-18 11:51:00,292 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:51:00,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:00,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:00,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:00,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:00,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:00,428 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:00,428 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:00,430 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:51:00,431 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:00,594 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:51:00,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:00,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:51:00,595 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 17 states. [2020-04-18 11:51:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:00,968 INFO L93 Difference]: Finished difference Result 130 states and 277 transitions. [2020-04-18 11:51:00,968 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 277 transitions. [2020-04-18 11:51:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:00,969 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:51:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:00,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 73 times [2020-04-18 11:51:00,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:00,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54545552] [2020-04-18 11:51:00,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:01,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54545552] [2020-04-18 11:51:01,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945543725] [2020-04-18 11:51:01,055 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 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 [2020-04-18 11:51:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:01,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:01,099 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:02,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:02,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:02,127 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:02,128 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:02,130 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 11:51:02,130 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:02,384 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:51:02,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:51:02,385 INFO L87 Difference]: Start difference. First operand 130 states and 277 transitions. Second operand 17 states. [2020-04-18 11:51:02,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:02,863 INFO L93 Difference]: Finished difference Result 146 states and 302 transitions. [2020-04-18 11:51:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 302 transitions. [2020-04-18 11:51:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:02,864 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:51:02,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:02,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 74 times [2020-04-18 11:51:02,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:02,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019134906] [2020-04-18 11:51:02,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:02,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019134906] [2020-04-18 11:51:02,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671699996] [2020-04-18 11:51:02,953 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 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 [2020-04-18 11:51:02,997 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:51:02,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:02,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:02,999 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:04,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:04,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 11:51:04,735 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:04,736 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:04,738 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:51:04,739 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:06,156 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:51:06,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:06,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=846, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:51:06,157 INFO L87 Difference]: Start difference. First operand 146 states and 302 transitions. Second operand 17 states. [2020-04-18 11:51:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:07,414 INFO L93 Difference]: Finished difference Result 156 states and 315 transitions. [2020-04-18 11:51:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 315 transitions. [2020-04-18 11:51:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:07,414 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:51:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:07,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 75 times [2020-04-18 11:51:07,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:07,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130320016] [2020-04-18 11:51:07,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:07,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130320016] [2020-04-18 11:51:07,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528741827] [2020-04-18 11:51:07,526 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 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 [2020-04-18 11:51:07,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:51:07,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:07,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:07,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:07,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:07,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:07,696 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:07,697 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:07,699 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:51:07,699 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:10,686 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:51:10,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:10,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=1495, Unknown=5, NotChecked=0, Total=2162 [2020-04-18 11:51:10,687 INFO L87 Difference]: Start difference. First operand 156 states and 315 transitions. Second operand 17 states. [2020-04-18 11:51:12,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:12,717 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2020-04-18 11:51:12,717 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 330 transitions. [2020-04-18 11:51:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:12,718 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:51:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 76 times [2020-04-18 11:51:12,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:12,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450560308] [2020-04-18 11:51:12,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:12,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450560308] [2020-04-18 11:51:12,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712630831] [2020-04-18 11:51:12,817 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 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 [2020-04-18 11:51:12,860 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:51:12,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:12,860 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:12,861 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:12,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:12,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:12,974 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:12,975 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:12,977 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 11:51:12,977 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:13,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:13,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:51:13,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:13,353 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:51:13,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:51:13,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1120, Invalid=3032, Unknown=8, NotChecked=0, Total=4160 [2020-04-18 11:51:13,354 INFO L87 Difference]: Start difference. First operand 169 states and 330 transitions. Second operand 19 states. [2020-04-18 11:51:15,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:15,001 INFO L93 Difference]: Finished difference Result 207 states and 383 transitions. [2020-04-18 11:51:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 383 transitions. [2020-04-18 11:51:15,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:15,002 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:51:15,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:15,002 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 77 times [2020-04-18 11:51:15,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:15,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102911411] [2020-04-18 11:51:15,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:15,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102911411] [2020-04-18 11:51:15,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046515701] [2020-04-18 11:51:15,127 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 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 [2020-04-18 11:51:15,169 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:51:15,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:15,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:15,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:15,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:15,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:15,299 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:15,301 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:15,303 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 11:51:15,303 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:15,381 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 14 times. [2020-04-18 11:51:15,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:15,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=3953, Unknown=10, NotChecked=0, Total=5402 [2020-04-18 11:51:15,382 INFO L87 Difference]: Start difference. First operand 207 states and 383 transitions. Second operand 17 states. [2020-04-18 11:51:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:15,796 INFO L93 Difference]: Finished difference Result 238 states and 445 transitions. [2020-04-18 11:51:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 445 transitions. [2020-04-18 11:51:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:15,796 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:51:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 78 times [2020-04-18 11:51:15,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:15,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825131564] [2020-04-18 11:51:15,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:15,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825131564] [2020-04-18 11:51:15,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305997163] [2020-04-18 11:51:15,897 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 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 [2020-04-18 11:51:15,939 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:51:15,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:15,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:15,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:16,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:16,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:16,538 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:16,563 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:16,565 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:51:16,565 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:17,071 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:51:17,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:17,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=3953, Unknown=10, NotChecked=0, Total=5402 [2020-04-18 11:51:17,072 INFO L87 Difference]: Start difference. First operand 238 states and 445 transitions. Second operand 17 states. [2020-04-18 11:51:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:17,596 INFO L93 Difference]: Finished difference Result 250 states and 462 transitions. [2020-04-18 11:51:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 462 transitions. [2020-04-18 11:51:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:17,597 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:51:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:17,597 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 79 times [2020-04-18 11:51:17,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:17,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029614208] [2020-04-18 11:51:17,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:17,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029614208] [2020-04-18 11:51:17,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851826322] [2020-04-18 11:51:17,700 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 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 [2020-04-18 11:51:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:17,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:17,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:19,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:19,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:19,072 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:19,073 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:19,074 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 11:51:19,075 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:19,166 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:51:19,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:19,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=3953, Unknown=10, NotChecked=0, Total=5402 [2020-04-18 11:51:19,167 INFO L87 Difference]: Start difference. First operand 250 states and 462 transitions. Second operand 17 states. [2020-04-18 11:51:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:19,837 INFO L93 Difference]: Finished difference Result 257 states and 469 transitions. [2020-04-18 11:51:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 469 transitions. [2020-04-18 11:51:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:19,838 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:51:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:19,839 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 80 times [2020-04-18 11:51:19,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:19,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447198078] [2020-04-18 11:51:19,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:19,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447198078] [2020-04-18 11:51:19,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400127817] [2020-04-18 11:51:19,922 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 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 [2020-04-18 11:51:19,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:51:19,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:19,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:19,966 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:20,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:20,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:20,083 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:20,084 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:20,086 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 11:51:20,086 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:20,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:20,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:20,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:20,161 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:51:20,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:51:20,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=4328, Unknown=10, NotChecked=0, Total=5852 [2020-04-18 11:51:20,162 INFO L87 Difference]: Start difference. First operand 257 states and 469 transitions. Second operand 19 states. [2020-04-18 11:51:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:21,269 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2020-04-18 11:51:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 527 transitions. [2020-04-18 11:51:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:21,269 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:51:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:21,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 81 times [2020-04-18 11:51:21,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:21,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401658684] [2020-04-18 11:51:21,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:21,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401658684] [2020-04-18 11:51:21,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554695037] [2020-04-18 11:51:21,397 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 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 [2020-04-18 11:51:21,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:51:21,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:21,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:21,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:21,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:21,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:21,561 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:21,562 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:21,564 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2020-04-18 11:51:21,564 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:21,631 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 18 times. [2020-04-18 11:51:21,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:21,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1700, Invalid=5262, Unknown=10, NotChecked=0, Total=6972 [2020-04-18 11:51:21,633 INFO L87 Difference]: Start difference. First operand 293 states and 527 transitions. Second operand 17 states. [2020-04-18 11:51:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:22,087 INFO L93 Difference]: Finished difference Result 307 states and 552 transitions. [2020-04-18 11:51:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 552 transitions. [2020-04-18 11:51:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:22,087 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:51:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:22,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 82 times [2020-04-18 11:51:22,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:22,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032682831] [2020-04-18 11:51:22,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:22,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032682831] [2020-04-18 11:51:22,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344673608] [2020-04-18 11:51:22,190 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 11:51:22,234 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:51:22,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:22,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:22,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:22,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:22,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:22,767 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:22,769 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:22,771 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 11:51:22,771 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:23,532 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:51:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1700, Invalid=5262, Unknown=10, NotChecked=0, Total=6972 [2020-04-18 11:51:23,533 INFO L87 Difference]: Start difference. First operand 307 states and 552 transitions. Second operand 17 states. [2020-04-18 11:51:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:24,071 INFO L93 Difference]: Finished difference Result 315 states and 561 transitions. [2020-04-18 11:51:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 561 transitions. [2020-04-18 11:51:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:24,072 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:51:24,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:24,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 83 times [2020-04-18 11:51:24,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:24,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494767221] [2020-04-18 11:51:24,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:24,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494767221] [2020-04-18 11:51:24,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136897060] [2020-04-18 11:51:24,198 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 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 [2020-04-18 11:51:24,241 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:51:24,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:24,242 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:24,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:25,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:25,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 11:51:25,394 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:25,395 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:25,398 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 11:51:25,398 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:25,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:25,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:26,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:26,095 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:51:26,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:51:26,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1766, Invalid=5534, Unknown=10, NotChecked=0, Total=7310 [2020-04-18 11:51:26,096 INFO L87 Difference]: Start difference. First operand 315 states and 561 transitions. Second operand 19 states. [2020-04-18 11:51:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:27,288 INFO L93 Difference]: Finished difference Result 342 states and 599 transitions. [2020-04-18 11:51:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 599 transitions. [2020-04-18 11:51:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:27,289 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:51:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:27,290 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 84 times [2020-04-18 11:51:27,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:27,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064214883] [2020-04-18 11:51:27,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:27,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064214883] [2020-04-18 11:51:27,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757213724] [2020-04-18 11:51:27,400 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 11:51:27,437 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:51:27,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:27,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:27,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:27,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:27,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:27,563 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:27,564 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:27,566 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 11:51:27,566 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:27,643 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 11:51:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:27,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1947, Invalid=6415, Unknown=10, NotChecked=0, Total=8372 [2020-04-18 11:51:27,644 INFO L87 Difference]: Start difference. First operand 342 states and 599 transitions. Second operand 17 states. [2020-04-18 11:51:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:28,128 INFO L93 Difference]: Finished difference Result 351 states and 613 transitions. [2020-04-18 11:51:28,128 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 613 transitions. [2020-04-18 11:51:28,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:28,129 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:51:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:28,129 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 85 times [2020-04-18 11:51:28,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:28,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860369113] [2020-04-18 11:51:28,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:28,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860369113] [2020-04-18 11:51:28,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759689853] [2020-04-18 11:51:28,216 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 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 [2020-04-18 11:51:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:28,260 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:28,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:29,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:29,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:29,207 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:29,208 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:29,211 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 11:51:29,211 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:29,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:29,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:29,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:51:29,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:29,505 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 11:51:29,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:51:29,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6704, Unknown=10, NotChecked=0, Total=8742 [2020-04-18 11:51:29,506 INFO L87 Difference]: Start difference. First operand 351 states and 613 transitions. Second operand 19 states. [2020-04-18 11:51:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:30,411 INFO L93 Difference]: Finished difference Result 375 states and 642 transitions. [2020-04-18 11:51:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 642 transitions. [2020-04-18 11:51:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:30,412 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:51:30,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:30,412 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 86 times [2020-04-18 11:51:30,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:30,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785608963] [2020-04-18 11:51:30,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:30,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785608963] [2020-04-18 11:51:30,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868620162] [2020-04-18 11:51:30,504 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 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 [2020-04-18 11:51:30,551 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:51:30,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:30,552 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:30,553 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:30,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:30,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:30,688 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:30,689 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:30,691 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 50 transitions. [2020-04-18 11:51:30,692 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:30,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:30,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:30,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:30,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:30,891 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 29 times. [2020-04-18 11:51:30,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:51:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2343, Invalid=7949, Unknown=10, NotChecked=0, Total=10302 [2020-04-18 11:51:30,893 INFO L87 Difference]: Start difference. First operand 375 states and 642 transitions. Second operand 20 states. [2020-04-18 11:51:31,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:31,614 INFO L93 Difference]: Finished difference Result 423 states and 717 transitions. [2020-04-18 11:51:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 717 transitions. [2020-04-18 11:51:31,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:31,615 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 11:51:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:31,616 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 87 times [2020-04-18 11:51:31,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:31,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642979293] [2020-04-18 11:51:31,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:31,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642979293] [2020-04-18 11:51:31,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782102452] [2020-04-18 11:51:31,690 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 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 [2020-04-18 11:51:31,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:51:31,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:31,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 11:51:31,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:31,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:31,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-04-18 11:51:31,813 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:31,814 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:31,816 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 40 transitions. [2020-04-18 11:51:31,817 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:31,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:32,062 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:51:32,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:51:32,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2664, Invalid=9536, Unknown=10, NotChecked=0, Total=12210 [2020-04-18 11:51:32,064 INFO L87 Difference]: Start difference. First operand 423 states and 717 transitions. Second operand 15 states. [2020-04-18 11:51:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:32,943 INFO L93 Difference]: Finished difference Result 453 states and 767 transitions. [2020-04-18 11:51:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 767 transitions. [2020-04-18 11:51:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:32,944 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 11:51:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:32,944 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 88 times [2020-04-18 11:51:32,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:32,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513050775] [2020-04-18 11:51:32,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:33,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513050775] [2020-04-18 11:51:33,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797322051] [2020-04-18 11:51:33,014 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 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 [2020-04-18 11:51:33,059 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:51:33,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:33,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:33,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:34,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:34,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 11:51:34,216 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:34,216 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:34,219 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:51:34,219 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:36,107 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:51:36,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:36,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3225, Invalid=11527, Unknown=10, NotChecked=0, Total=14762 [2020-04-18 11:51:36,108 INFO L87 Difference]: Start difference. First operand 453 states and 767 transitions. Second operand 17 states. [2020-04-18 11:51:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:37,640 INFO L93 Difference]: Finished difference Result 475 states and 794 transitions. [2020-04-18 11:51:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 794 transitions. [2020-04-18 11:51:37,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:37,640 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 11:51:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:37,641 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 89 times [2020-04-18 11:51:37,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:37,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069064981] [2020-04-18 11:51:37,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:37,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069064981] [2020-04-18 11:51:37,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132887050] [2020-04-18 11:51:37,717 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 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 [2020-04-18 11:51:37,760 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:51:37,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:37,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:37,762 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:37,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:37,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:37,947 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:37,948 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:37,951 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 11:51:37,951 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:38,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:38,418 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 11:51:38,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:51:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3896, Invalid=13650, Unknown=10, NotChecked=0, Total=17556 [2020-04-18 11:51:38,419 INFO L87 Difference]: Start difference. First operand 475 states and 794 transitions. Second operand 18 states. [2020-04-18 11:51:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:40,277 INFO L93 Difference]: Finished difference Result 495 states and 823 transitions. [2020-04-18 11:51:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 823 transitions. [2020-04-18 11:51:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:40,278 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 11:51:40,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:40,278 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 90 times [2020-04-18 11:51:40,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:40,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269546337] [2020-04-18 11:51:40,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:40,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269546337] [2020-04-18 11:51:40,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626511415] [2020-04-18 11:51:40,359 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 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 [2020-04-18 11:51:40,433 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:51:40,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:40,435 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:40,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:40,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:40,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:40,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:40,632 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:40,632 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:40,634 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:51:40,635 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:42,375 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:51:42,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:42,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4865, Invalid=16878, Unknown=13, NotChecked=0, Total=21756 [2020-04-18 11:51:42,377 INFO L87 Difference]: Start difference. First operand 495 states and 823 transitions. Second operand 17 states. [2020-04-18 11:51:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:45,653 INFO L93 Difference]: Finished difference Result 540 states and 879 transitions. [2020-04-18 11:51:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 879 transitions. [2020-04-18 11:51:45,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:45,654 INFO L105 Mcr]: ---- MCR iteration 19 ---- [2020-04-18 11:51:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:45,654 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 91 times [2020-04-18 11:51:45,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:45,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448134717] [2020-04-18 11:51:45,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:45,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448134717] [2020-04-18 11:51:45,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087849159] [2020-04-18 11:51:45,772 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 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 [2020-04-18 11:51:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:45,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:45,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:45,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:45,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:45,975 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:45,976 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:45,978 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:51:45,978 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:46,126 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:51:46,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:46,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5850, Invalid=20868, Unknown=14, NotChecked=0, Total=26732 [2020-04-18 11:51:46,128 INFO L87 Difference]: Start difference. First operand 540 states and 879 transitions. Second operand 17 states. [2020-04-18 11:51:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:47,517 INFO L93 Difference]: Finished difference Result 554 states and 889 transitions. [2020-04-18 11:51:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 889 transitions. [2020-04-18 11:51:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:47,518 INFO L105 Mcr]: ---- MCR iteration 20 ---- [2020-04-18 11:51:47,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:47,518 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 92 times [2020-04-18 11:51:47,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:47,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076377010] [2020-04-18 11:51:47,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:47,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076377010] [2020-04-18 11:51:47,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526502016] [2020-04-18 11:51:47,595 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 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 [2020-04-18 11:51:47,638 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:51:47,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:47,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:47,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:47,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:47,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:47,756 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:47,758 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:47,760 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:51:47,760 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:48,069 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:51:48,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:48,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6839, Invalid=24299, Unknown=14, NotChecked=0, Total=31152 [2020-04-18 11:51:48,072 INFO L87 Difference]: Start difference. First operand 554 states and 889 transitions. Second operand 17 states. [2020-04-18 11:51:49,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:49,970 INFO L93 Difference]: Finished difference Result 573 states and 908 transitions. [2020-04-18 11:51:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 908 transitions. [2020-04-18 11:51:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:49,971 INFO L105 Mcr]: ---- MCR iteration 21 ---- [2020-04-18 11:51:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:49,972 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 93 times [2020-04-18 11:51:49,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:49,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495283529] [2020-04-18 11:51:49,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:50,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495283529] [2020-04-18 11:51:50,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069051028] [2020-04-18 11:51:50,056 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 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 [2020-04-18 11:51:50,098 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:51:50,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:50,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 11:51:50,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:50,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:50,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-04-18 11:51:50,190 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:50,192 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:50,193 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-04-18 11:51:50,194 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:50,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:50,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:50,602 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:51:50,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:50,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8159, Invalid=30046, Unknown=15, NotChecked=0, Total=38220 [2020-04-18 11:51:50,605 INFO L87 Difference]: Start difference. First operand 573 states and 908 transitions. Second operand 17 states. [2020-04-18 11:51:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:52,002 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-04-18 11:51:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 935 transitions. [2020-04-18 11:51:52,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:52,003 INFO L105 Mcr]: ---- MCR iteration 22 ---- [2020-04-18 11:51:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:52,003 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 94 times [2020-04-18 11:51:52,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:52,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494710700] [2020-04-18 11:51:52,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:52,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494710700] [2020-04-18 11:51:52,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904602064] [2020-04-18 11:51:52,120 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 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 [2020-04-18 11:51:52,188 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:51:52,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:52,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:52,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:52,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:52,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:52,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:52,893 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:52,894 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:52,896 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:51:52,896 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:59,741 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:51:59,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:59,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10093, Invalid=35894, Unknown=23, NotChecked=0, Total=46010 [2020-04-18 11:51:59,743 INFO L87 Difference]: Start difference. First operand 605 states and 935 transitions. Second operand 17 states. [2020-04-18 11:52:01,835 WARN L192 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-04-18 11:52:04,744 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-18 11:52:07,178 WARN L192 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-04-18 11:52:07,914 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-04-18 11:52:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:11,134 INFO L93 Difference]: Finished difference Result 619 states and 947 transitions. [2020-04-18 11:52:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 947 transitions. [2020-04-18 11:52:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:52:11,135 INFO L105 Mcr]: ---- MCR iteration 23 ---- [2020-04-18 11:52:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:11,135 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 95 times [2020-04-18 11:52:11,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:11,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939067313] [2020-04-18 11:52:11,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:11,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939067313] [2020-04-18 11:52:11,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687092267] [2020-04-18 11:52:11,229 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 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 [2020-04-18 11:52:11,271 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:52:11,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:11,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:52:11,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:11,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:11,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:11,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:52:11,375 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:11,376 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:11,378 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:52:11,378 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:12,882 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:52:12,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:52:12,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12113, Invalid=43786, Unknown=33, NotChecked=0, Total=55932 [2020-04-18 11:52:12,885 INFO L87 Difference]: Start difference. First operand 619 states and 947 transitions. Second operand 17 states. Received shutdown request... [2020-04-18 11:52:24,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:24,347 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-18 11:52:24,353 WARN L228 ceAbstractionStarter]: Timeout [2020-04-18 11:52:24,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 11:52:24 BasicIcfg [2020-04-18 11:52:24,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 11:52:24,354 INFO L168 Benchmark]: Toolchain (without parser) took 281903.93 ms. Allocated memory was 136.3 MB in the beginning and 287.8 MB in the end (delta: 151.5 MB). Free memory was 99.0 MB in the beginning and 154.7 MB in the end (delta: -55.7 MB). Peak memory consumption was 95.8 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:24,355 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-04-18 11:52:24,355 INFO L168 Benchmark]: CACSL2BoogieTranslator took 713.63 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 97.0 MB in the beginning and 158.4 MB in the end (delta: -61.5 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:24,356 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.26 ms. Allocated memory is still 200.8 MB. Free memory was 158.4 MB in the beginning and 156.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:24,356 INFO L168 Benchmark]: Boogie Preprocessor took 31.92 ms. Allocated memory is still 200.8 MB. Free memory was 156.3 MB in the beginning and 154.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:24,356 INFO L168 Benchmark]: RCFGBuilder took 468.37 ms. Allocated memory is still 200.8 MB. Free memory was 154.2 MB in the beginning and 134.5 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:24,357 INFO L168 Benchmark]: TraceAbstraction took 280617.55 ms. Allocated memory was 200.8 MB in the beginning and 287.8 MB in the end (delta: 87.0 MB). Free memory was 133.8 MB in the beginning and 154.7 MB in the end (delta: -20.9 MB). Peak memory consumption was 66.2 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:24,358 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 713.63 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 97.0 MB in the beginning and 158.4 MB in the end (delta: -61.5 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.26 ms. Allocated memory is still 200.8 MB. Free memory was 158.4 MB in the beginning and 156.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.92 ms. Allocated memory is still 200.8 MB. Free memory was 156.3 MB in the beginning and 154.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 468.37 ms. Allocated memory is still 200.8 MB. Free memory was 154.2 MB in the beginning and 134.5 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 280617.55 ms. Allocated memory was 200.8 MB in the beginning and 287.8 MB in the end (delta: 87.0 MB). Free memory was 133.8 MB in the beginning and 154.7 MB in the end (delta: -20.9 MB). Peak memory consumption was 66.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 553 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 879 CheckedPairsTotal, 48 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 4,while PredicateComparison was comparing new predicate (quantifier-free) to 248 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 280.4s, OverallIterations: 17, TraceHistogramMax: 6, AutomataDifference: 45.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 259 SDtfs, 4700 SDslu, 3938 SDs, 0 SdLazy, 3459 SolverSat, 1064 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 31.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2930 GetRequests, 1873 SyntacticMatches, 203 SemanticMatches, 854 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62820 ImplicationChecksByTransitivity, 83.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=250occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 1138 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown