/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/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 11:52:18,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 11:52:18,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 11:52:18,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 11:52:18,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 11:52:18,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 11:52:18,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 11:52:18,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 11:52:18,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 11:52:18,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 11:52:18,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 11:52:18,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 11:52:18,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 11:52:18,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 11:52:18,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 11:52:18,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 11:52:18,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 11:52:18,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 11:52:18,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 11:52:18,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 11:52:18,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 11:52:18,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 11:52:18,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 11:52:18,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 11:52:18,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 11:52:18,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 11:52:18,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 11:52:18,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 11:52:18,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 11:52:18,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 11:52:18,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 11:52:18,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 11:52:18,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 11:52:18,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 11:52:18,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 11:52:18,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 11:52:18,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 11:52:18,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 11:52:18,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 11:52:18,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 11:52:18,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 11:52:18,335 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 11:52:18,349 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 11:52:18,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 11:52:18,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 11:52:18,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 11:52:18,351 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 11:52:18,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 11:52:18,352 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 11:52:18,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 11:52:18,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 11:52:18,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 11:52:18,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 11:52:18,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 11:52:18,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 11:52:18,353 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 11:52:18,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 11:52:18,353 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 11:52:18,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 11:52:18,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 11:52:18,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 11:52:18,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 11:52:18,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 11:52:18,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:52:18,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 11:52:18,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 11:52:18,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 11:52:18,355 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 11:52:18,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 11:52:18,356 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-18 11:52:18,356 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 11:52:18,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 11:52:18,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 11:52:18,624 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 11:52:18,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 11:52:18,639 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 11:52:18,641 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 11:52:18,642 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 11:52:18,642 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-04-18 11:52:18,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a4f52a2b/83b46dc0bc244b4986d0c4b76d8dd064/FLAG08ed8d8fc [2020-04-18 11:52:19,202 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 11:52:19,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-04-18 11:52:19,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a4f52a2b/83b46dc0bc244b4986d0c4b76d8dd064/FLAG08ed8d8fc [2020-04-18 11:52:19,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a4f52a2b/83b46dc0bc244b4986d0c4b76d8dd064 [2020-04-18 11:52:19,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 11:52:19,546 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 11:52:19,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 11:52:19,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 11:52:19,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 11:52:19,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:52:19" (1/1) ... [2020-04-18 11:52:19,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2407fc1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:19, skipping insertion in model container [2020-04-18 11:52:19,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:52:19" (1/1) ... [2020-04-18 11:52:19,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 11:52:19,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 11:52:20,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:52:20,053 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 11:52:20,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:52:20,184 INFO L208 MainTranslator]: Completed translation [2020-04-18 11:52:20,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20 WrapperNode [2020-04-18 11:52:20,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 11:52:20,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 11:52:20,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 11:52:20,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 11:52:20,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20" (1/1) ... [2020-04-18 11:52:20,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20" (1/1) ... [2020-04-18 11:52:20,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 11:52:20,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 11:52:20,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 11:52:20,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 11:52:20,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20" (1/1) ... [2020-04-18 11:52:20,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20" (1/1) ... [2020-04-18 11:52:20,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20" (1/1) ... [2020-04-18 11:52:20,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20" (1/1) ... [2020-04-18 11:52:20,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20" (1/1) ... [2020-04-18 11:52:20,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20" (1/1) ... [2020-04-18 11:52:20,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20" (1/1) ... [2020-04-18 11:52:20,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 11:52:20,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 11:52:20,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 11:52:20,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 11:52:20,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20" (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 11:52:20,385 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 11:52:20,386 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 11:52:20,386 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 11:52:20,386 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 11:52:20,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 11:52:20,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 11:52:20,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 11:52:20,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 11:52:20,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 11:52:20,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 11:52:20,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 11:52:20,389 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 11:52:20,739 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 11:52:20,739 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 11:52:20,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:52:20 BoogieIcfgContainer [2020-04-18 11:52:20,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 11:52:20,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 11:52:20,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 11:52:20,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 11:52:20,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 11:52:19" (1/3) ... [2020-04-18 11:52:20,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e6f5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:52:20, skipping insertion in model container [2020-04-18 11:52:20,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:52:20" (2/3) ... [2020-04-18 11:52:20,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e6f5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:52:20, skipping insertion in model container [2020-04-18 11:52:20,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:52:20" (3/3) ... [2020-04-18 11:52:20,752 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-04-18 11:52:20,762 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 11:52:20,762 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 11:52:20,769 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 11:52:20,770 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 11:52:20,795 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,795 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,795 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,796 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,796 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,797 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,797 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,797 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,797 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,798 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,798 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,798 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,798 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,799 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,799 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,800 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,800 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,800 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,800 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,801 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,801 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,801 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,801 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,802 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,802 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,802 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,803 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,803 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,806 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,807 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,807 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,807 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,807 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,808 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,813 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,813 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,814 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,814 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,814 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,814 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:52:20,832 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 11:52:20,852 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 11:52:20,853 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 11:52:20,853 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 11:52:20,853 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 11:52:20,853 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 11:52:20,853 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 11:52:20,853 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 11:52:20,854 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 11:52:20,868 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-04-18 11:52:20,870 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-18 11:52:20,908 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-18 11:52:20,908 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:52:20,914 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-18 11:52:20,916 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-18 11:52:20,933 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-18 11:52:20,933 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:52:20,934 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-18 11:52:20,936 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-04-18 11:52:20,937 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-18 11:52:21,985 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-04-18 11:52:22,224 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-04-18 11:52:22,225 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-04-18 11:52:22,228 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-18 11:52:22,241 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 11:52:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 11:52:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:52:22,250 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:52:22,251 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 11:52:22,251 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:52:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:22,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-04-18 11:52:22,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:52:22,266 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [746146272] [2020-04-18 11:52:22,280 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:22,293 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:52:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 11:52:22,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:52:22,296 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:52:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:22,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 2 times [2020-04-18 11:52:22,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:22,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944162208] [2020-04-18 11:52:22,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:22,548 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 11:52:22,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944162208] [2020-04-18 11:52:22,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:52:22,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:52:22,553 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:22,557 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:22,561 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:52:22,561 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:22,585 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:52:22,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 11:52:22,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 11:52:22,592 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-04-18 11:52:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:22,638 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 11:52:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 11:52:22,638 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:22,639 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [746146272] [2020-04-18 11:52:22,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:22,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:52:22,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [746146272] [2020-04-18 11:52:22,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 11:52:22,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:52:22,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 11:52:22,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:52:22,653 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-18 11:52:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:22,717 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-04-18 11:52:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 11:52:22,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-18 11:52:22,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:52:22,736 INFO L225 Difference]: With dead ends: 75 [2020-04-18 11:52:22,736 INFO L226 Difference]: Without dead ends: 42 [2020-04-18 11:52:22,738 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 11:52:22,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-18 11:52:22,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-18 11:52:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 11:52:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-04-18 11:52:22,789 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-04-18 11:52:22,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:52:22,789 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-04-18 11:52:22,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 11:52:22,790 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-04-18 11:52:22,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:52:22,790 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:52:22,791 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:52:22,791 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:52:22,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:22,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-04-18 11:52:22,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:52:22,792 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2047764215] [2020-04-18 11:52:22,792 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:22,794 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 11:52:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 11:52:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:52:22,795 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:52:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:22,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 2 times [2020-04-18 11:52:22,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:22,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896333125] [2020-04-18 11:52:22,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:22,876 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 11:52:22,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896333125] [2020-04-18 11:52:22,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:52:22,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:52:22,878 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:22,878 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:22,881 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 11:52:22,881 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:22,903 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:52:22,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:52:22,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:52:22,904 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-04-18 11:52:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:22,921 INFO L93 Difference]: Finished difference Result 17 states and 24 transitions. [2020-04-18 11:52:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2020-04-18 11:52:22,922 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:22,922 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2047764215] [2020-04-18 11:52:22,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:22,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 11:52:22,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2047764215] [2020-04-18 11:52:22,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-18 11:52:22,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:52:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:52:22,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:52:22,925 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-04-18 11:52:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:22,947 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-04-18 11:52:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-18 11:52:22,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-18 11:52:22,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:52:22,949 INFO L225 Difference]: With dead ends: 56 [2020-04-18 11:52:22,949 INFO L226 Difference]: Without dead ends: 50 [2020-04-18 11:52:22,950 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:52:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-18 11:52:22,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-04-18 11:52:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 11:52:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-04-18 11:52:22,958 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-04-18 11:52:22,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:52:22,959 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-04-18 11:52:22,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-18 11:52:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-04-18 11:52:22,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:52:22,960 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:52:22,960 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:52:22,960 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:52:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:22,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-04-18 11:52:22,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:52:22,961 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [965359167] [2020-04-18 11:52:22,962 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:22,963 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 66 transitions. [2020-04-18 11:52:22,964 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 11:52:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:52:22,965 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:52:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:22,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 2 times [2020-04-18 11:52:22,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:22,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70751564] [2020-04-18 11:52:22,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:23,074 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 11:52:23,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70751564] [2020-04-18 11:52:23,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:52:23,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:52:23,076 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:23,077 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:23,082 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:52:23,082 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:23,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:23,133 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:23,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:52:23,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:52:23,134 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 7 states. [2020-04-18 11:52:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:23,261 INFO L93 Difference]: Finished difference Result 37 states and 68 transitions. [2020-04-18 11:52:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 68 transitions. [2020-04-18 11:52:23,262 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:23,263 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [965359167] [2020-04-18 11:52:23,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:23,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:52:23,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [965359167] [2020-04-18 11:52:23,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 11:52:23,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:52:23,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:52:23,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:52:23,265 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-04-18 11:52:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:23,332 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-04-18 11:52:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 11:52:23,332 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-04-18 11:52:23,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:52:23,333 INFO L225 Difference]: With dead ends: 62 [2020-04-18 11:52:23,334 INFO L226 Difference]: Without dead ends: 44 [2020-04-18 11:52:23,334 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:52:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-04-18 11:52:23,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-04-18 11:52:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-18 11:52:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-04-18 11:52:23,340 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-04-18 11:52:23,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:52:23,340 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-04-18 11:52:23,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 11:52:23,341 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-04-18 11:52:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:52:23,341 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:52:23,342 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:52:23,342 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:52:23,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:23,342 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 3 times [2020-04-18 11:52:23,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:52:23,343 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1200308115] [2020-04-18 11:52:23,343 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:23,344 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 87 transitions. [2020-04-18 11:52:23,345 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 11:52:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:52:23,346 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:52:23,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:23,347 INFO L82 PathProgramCache]: Analyzing trace with hash 211005421, now seen corresponding path program 4 times [2020-04-18 11:52:23,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:23,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167872076] [2020-04-18 11:52:23,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:23,432 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 11:52:23,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167872076] [2020-04-18 11:52:23,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:52:23,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:52:23,434 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:23,435 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:23,437 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 11:52:23,438 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:23,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:23,477 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:23,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:52:23,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:52:23,478 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 7 states. [2020-04-18 11:52:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:23,616 INFO L93 Difference]: Finished difference Result 51 states and 95 transitions. [2020-04-18 11:52:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 95 transitions. [2020-04-18 11:52:23,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:52:23,618 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:52:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-04-18 11:52:23,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:23,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350701340] [2020-04-18 11:52:23,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:23,699 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 11:52:23,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350701340] [2020-04-18 11:52:23,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777253615] [2020-04-18 11:52:23,700 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 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 11:52:23,771 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:52:23,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:23,773 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:52:23,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:23,812 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 11:52:23,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:23,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-18 11:52:23,813 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:23,814 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:23,816 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-04-18 11:52:23,816 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:23,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:23,938 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:52:23,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 11:52:23,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-18 11:52:23,942 INFO L87 Difference]: Start difference. First operand 51 states and 95 transitions. Second operand 8 states. [2020-04-18 11:52:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:24,096 INFO L93 Difference]: Finished difference Result 64 states and 107 transitions. [2020-04-18 11:52:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 107 transitions. [2020-04-18 11:52:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:52:24,097 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:52:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 6 times [2020-04-18 11:52:24,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:24,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581904764] [2020-04-18 11:52:24,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:24,186 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 11:52:24,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581904764] [2020-04-18 11:52:24,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009474370] [2020-04-18 11:52:24,187 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 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 11:52:24,243 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:52:24,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:24,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:52:24,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:24,256 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 11:52:24,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:24,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-18 11:52:24,257 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:24,258 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:24,260 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 11:52:24,261 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:24,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:24,312 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:24,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 11:52:24,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:52:24,313 INFO L87 Difference]: Start difference. First operand 64 states and 107 transitions. Second operand 8 states. [2020-04-18 11:52:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:24,588 INFO L93 Difference]: Finished difference Result 66 states and 108 transitions. [2020-04-18 11:52:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 108 transitions. [2020-04-18 11:52:24,589 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:24,589 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1200308115] [2020-04-18 11:52:24,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:24,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:52:24,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1200308115] [2020-04-18 11:52:24,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 11:52:24,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:52:24,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:52:24,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:52:24,592 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 16 states. [2020-04-18 11:52:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:24,730 INFO L93 Difference]: Finished difference Result 78 states and 191 transitions. [2020-04-18 11:52:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 11:52:24,730 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 11 [2020-04-18 11:52:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:52:24,732 INFO L225 Difference]: With dead ends: 78 [2020-04-18 11:52:24,732 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 11:52:24,733 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:52:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 11:52:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-04-18 11:52:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-18 11:52:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-04-18 11:52:24,740 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 11 [2020-04-18 11:52:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:52:24,740 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-04-18 11:52:24,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 11:52:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-04-18 11:52:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:52:24,741 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:52:24,741 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:52:25,154 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 11:52:25,155 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:52:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:25,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 7 times [2020-04-18 11:52:25,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:52:25,157 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [222107984] [2020-04-18 11:52:25,158 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:25,159 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 120 transitions. [2020-04-18 11:52:25,160 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 11:52:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:52:25,161 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:52:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1480255448, now seen corresponding path program 8 times [2020-04-18 11:52:25,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:25,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165885664] [2020-04-18 11:52:25,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:25,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165885664] [2020-04-18 11:52:25,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:52:25,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:52:25,246 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:25,247 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:25,251 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 11:52:25,251 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:25,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:25,296 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:25,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:52:25,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:52:25,297 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 7 states. [2020-04-18 11:52:25,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:25,440 INFO L93 Difference]: Finished difference Result 72 states and 143 transitions. [2020-04-18 11:52:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 143 transitions. [2020-04-18 11:52:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:52:25,440 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:52:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:25,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-04-18 11:52:25,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:25,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815786427] [2020-04-18 11:52:25,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:25,542 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 11:52:25,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815786427] [2020-04-18 11:52:25,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724416648] [2020-04-18 11:52:25,543 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:25,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:52:25,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:25,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:52:25,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:25,624 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 11:52:25,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:25,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 11:52:25,626 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:25,627 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:25,630 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:52:25,630 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:25,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:25,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:25,683 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:25,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:25,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:52:25,684 INFO L87 Difference]: Start difference. First operand 72 states and 143 transitions. Second operand 9 states. [2020-04-18 11:52:25,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:25,836 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-04-18 11:52:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2020-04-18 11:52:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:52:25,837 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:52:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:25,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 10 times [2020-04-18 11:52:25,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:25,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448034402] [2020-04-18 11:52:25,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:25,934 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 11:52:25,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448034402] [2020-04-18 11:52:25,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584793957] [2020-04-18 11:52:25,936 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 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 11:52:25,997 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:52:25,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:25,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:52:26,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:26,014 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 11:52:26,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:26,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 11:52:26,015 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:26,016 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:26,018 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-04-18 11:52:26,019 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:26,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:26,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:26,061 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:26,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:26,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:52:26,062 INFO L87 Difference]: Start difference. First operand 81 states and 156 transitions. Second operand 9 states. [2020-04-18 11:52:26,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:26,247 INFO L93 Difference]: Finished difference Result 83 states and 158 transitions. [2020-04-18 11:52:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 158 transitions. [2020-04-18 11:52:26,248 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:26,248 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [222107984] [2020-04-18 11:52:26,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:26,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:52:26,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [222107984] [2020-04-18 11:52:26,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 11:52:26,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:52:26,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:52:26,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:52:26,250 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 12 states. [2020-04-18 11:52:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:26,341 INFO L93 Difference]: Finished difference Result 70 states and 171 transitions. [2020-04-18 11:52:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-18 11:52:26,341 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-04-18 11:52:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:52:26,342 INFO L225 Difference]: With dead ends: 70 [2020-04-18 11:52:26,343 INFO L226 Difference]: Without dead ends: 58 [2020-04-18 11:52:26,343 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:52:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-18 11:52:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-04-18 11:52:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 11:52:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-04-18 11:52:26,349 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 12 [2020-04-18 11:52:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:52:26,350 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-04-18 11:52:26,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 11:52:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-04-18 11:52:26,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:52:26,350 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:52:26,351 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:52:26,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:26,763 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:52:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:26,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 11 times [2020-04-18 11:52:26,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:52:26,765 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [420859063] [2020-04-18 11:52:26,766 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:26,768 INFO L259 McrAutomatonBuilder]: Finished intersection with 87 states and 190 transitions. [2020-04-18 11:52:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-04-18 11:52:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:52:26,773 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:52:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:26,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1378156957, now seen corresponding path program 12 times [2020-04-18 11:52:26,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:26,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583175663] [2020-04-18 11:52:26,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:52:26,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583175663] [2020-04-18 11:52:26,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:52:26,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:52:26,860 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:26,862 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:26,866 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 46 transitions. [2020-04-18 11:52:26,866 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:26,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:26,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:26,903 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:26,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:52:26,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:52:26,904 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 7 states. [2020-04-18 11:52:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:27,048 INFO L93 Difference]: Finished difference Result 123 states and 265 transitions. [2020-04-18 11:52:27,048 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 265 transitions. [2020-04-18 11:52:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:52:27,050 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:52:27,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:27,050 INFO L82 PathProgramCache]: Analyzing trace with hash 891297657, now seen corresponding path program 13 times [2020-04-18 11:52:27,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:27,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478214940] [2020-04-18 11:52:27,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:27,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478214940] [2020-04-18 11:52:27,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811729048] [2020-04-18 11:52:27,162 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:27,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:52:27,235 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:27,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:27,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 11:52:27,259 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:27,263 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:27,267 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 11:52:27,267 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:27,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:27,330 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:27,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:27,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:52:27,331 INFO L87 Difference]: Start difference. First operand 123 states and 265 transitions. Second operand 9 states. [2020-04-18 11:52:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:27,484 INFO L93 Difference]: Finished difference Result 148 states and 314 transitions. [2020-04-18 11:52:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 314 transitions. [2020-04-18 11:52:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:52:27,485 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:52:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:27,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1405192407, now seen corresponding path program 14 times [2020-04-18 11:52:27,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:27,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5844314] [2020-04-18 11:52:27,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:27,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5844314] [2020-04-18 11:52:27,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99574130] [2020-04-18 11:52:27,553 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:27,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:52:27,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:27,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:52:27,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:27,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:27,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 11:52:27,632 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:27,634 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:27,637 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 11:52:27,637 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:27,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:27,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:27,673 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:27,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:27,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:52:27,674 INFO L87 Difference]: Start difference. First operand 148 states and 314 transitions. Second operand 9 states. [2020-04-18 11:52:27,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:27,886 INFO L93 Difference]: Finished difference Result 162 states and 337 transitions. [2020-04-18 11:52:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 337 transitions. [2020-04-18 11:52:27,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:52:27,887 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:52:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:27,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 15 times [2020-04-18 11:52:27,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:27,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689312045] [2020-04-18 11:52:27,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:27,991 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 11:52:27,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689312045] [2020-04-18 11:52:27,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847440078] [2020-04-18 11:52:27,992 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:28,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:52:28,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:28,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:52:28,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:28,090 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 11:52:28,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:28,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:28,091 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:28,093 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:28,097 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 11:52:28,097 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:28,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:28,152 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:28,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:28,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:52:28,153 INFO L87 Difference]: Start difference. First operand 162 states and 337 transitions. Second operand 11 states. [2020-04-18 11:52:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:28,365 INFO L93 Difference]: Finished difference Result 167 states and 342 transitions. [2020-04-18 11:52:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 342 transitions. [2020-04-18 11:52:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:52:28,367 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:52:28,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:28,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 16 times [2020-04-18 11:52:28,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:28,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34057940] [2020-04-18 11:52:28,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:28,451 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 11:52:28,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34057940] [2020-04-18 11:52:28,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223724007] [2020-04-18 11:52:28,451 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:28,499 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:52:28,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:28,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:52:28,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:28,519 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 11:52:28,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:28,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:28,520 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:28,521 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:28,523 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-04-18 11:52:28,523 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:28,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:28,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:28,526 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:28,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:28,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:52:28,527 INFO L87 Difference]: Start difference. First operand 167 states and 342 transitions. Second operand 11 states. [2020-04-18 11:52:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:28,786 INFO L93 Difference]: Finished difference Result 176 states and 355 transitions. [2020-04-18 11:52:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 355 transitions. [2020-04-18 11:52:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:52:28,787 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:52:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:28,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 17 times [2020-04-18 11:52:28,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:28,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195709654] [2020-04-18 11:52:28,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:28,884 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 11:52:28,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195709654] [2020-04-18 11:52:28,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899345967] [2020-04-18 11:52:28,885 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:28,938 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:52:28,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:28,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:52:28,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:28,953 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 11:52:28,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:28,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:28,954 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:28,957 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:28,959 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-04-18 11:52:28,959 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:28,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:29,012 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:29,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:29,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 11:52:29,013 INFO L87 Difference]: Start difference. First operand 176 states and 355 transitions. Second operand 11 states. [2020-04-18 11:52:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:29,301 INFO L93 Difference]: Finished difference Result 178 states and 357 transitions. [2020-04-18 11:52:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 357 transitions. [2020-04-18 11:52:29,301 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:29,302 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [420859063] [2020-04-18 11:52:29,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:29,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 11:52:29,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [420859063] [2020-04-18 11:52:29,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 11:52:29,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:52:29,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:52:29,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2020-04-18 11:52:29,304 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 17 states. [2020-04-18 11:52:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:29,487 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-04-18 11:52:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 11:52:29,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-18 11:52:29,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:52:29,488 INFO L225 Difference]: With dead ends: 74 [2020-04-18 11:52:29,489 INFO L226 Difference]: Without dead ends: 62 [2020-04-18 11:52:29,489 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 165 SyntacticMatches, 30 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2020-04-18 11:52:29,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-18 11:52:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-04-18 11:52:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 11:52:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-04-18 11:52:29,495 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-04-18 11:52:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:52:29,495 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-04-18 11:52:29,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 11:52:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-04-18 11:52:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:52:29,496 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:52:29,496 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:52:30,507 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 11:52:30,508 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:52:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:30,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 18 times [2020-04-18 11:52:30,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:52:30,510 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [592599015] [2020-04-18 11:52:30,510 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:30,512 INFO L259 McrAutomatonBuilder]: Finished intersection with 102 states and 227 transitions. [2020-04-18 11:52:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states. [2020-04-18 11:52:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:52:30,513 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:52:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:30,514 INFO L82 PathProgramCache]: Analyzing trace with hash 226807821, now seen corresponding path program 19 times [2020-04-18 11:52:30,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:30,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784954732] [2020-04-18 11:52:30,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-04-18 11:52:30,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784954732] [2020-04-18 11:52:30,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:52:30,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:52:30,575 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:30,576 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:30,580 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 49 transitions. [2020-04-18 11:52:30,580 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:30,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:30,629 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:30,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:52:30,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:52:30,630 INFO L87 Difference]: Start difference. First operand 102 states. Second operand 7 states. [2020-04-18 11:52:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:30,785 INFO L93 Difference]: Finished difference Result 153 states and 339 transitions. [2020-04-18 11:52:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 339 transitions. [2020-04-18 11:52:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:52:30,787 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:52:30,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:30,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1860424119, now seen corresponding path program 20 times [2020-04-18 11:52:30,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:30,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870148927] [2020-04-18 11:52:30,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 11:52:30,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870148927] [2020-04-18 11:52:30,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725592762] [2020-04-18 11:52:30,855 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 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 11:52:30,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:52:30,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:30,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:52:30,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 11:52:30,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:30,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 11:52:30,932 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:30,934 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:30,937 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-04-18 11:52:30,938 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:30,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:30,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:30,962 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:30,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:30,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:52:30,963 INFO L87 Difference]: Start difference. First operand 153 states and 339 transitions. Second operand 9 states. [2020-04-18 11:52:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:31,168 INFO L93 Difference]: Finished difference Result 189 states and 414 transitions. [2020-04-18 11:52:31,168 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 414 transitions. [2020-04-18 11:52:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:52:31,169 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:52:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:31,169 INFO L82 PathProgramCache]: Analyzing trace with hash 611292185, now seen corresponding path program 21 times [2020-04-18 11:52:31,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:31,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211159811] [2020-04-18 11:52:31,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 11:52:31,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211159811] [2020-04-18 11:52:31,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89028466] [2020-04-18 11:52:31,234 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 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 11:52:31,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:52:31,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:31,286 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:52:31,287 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 11:52:31,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:31,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 11:52:31,303 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:31,304 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:31,307 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 39 transitions. [2020-04-18 11:52:31,310 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:31,339 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:31,358 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:31,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:31,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:52:31,359 INFO L87 Difference]: Start difference. First operand 189 states and 414 transitions. Second operand 9 states. [2020-04-18 11:52:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:31,556 INFO L93 Difference]: Finished difference Result 213 states and 460 transitions. [2020-04-18 11:52:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 460 transitions. [2020-04-18 11:52:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:52:31,557 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:52:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:31,558 INFO L82 PathProgramCache]: Analyzing trace with hash 963815535, now seen corresponding path program 22 times [2020-04-18 11:52:31,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:31,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976107200] [2020-04-18 11:52:31,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:52:31,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976107200] [2020-04-18 11:52:31,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874234424] [2020-04-18 11:52:31,673 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:31,741 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:52:31,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:31,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:52:31,746 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:52:31,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:31,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:31,756 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:31,757 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:31,760 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-04-18 11:52:31,760 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:31,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:31,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:31,792 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:31,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:31,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:52:31,793 INFO L87 Difference]: Start difference. First operand 213 states and 460 transitions. Second operand 11 states. [2020-04-18 11:52:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:32,011 INFO L93 Difference]: Finished difference Result 223 states and 475 transitions. [2020-04-18 11:52:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 475 transitions. [2020-04-18 11:52:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:52:32,013 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:52:32,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:32,013 INFO L82 PathProgramCache]: Analyzing trace with hash 895431245, now seen corresponding path program 23 times [2020-04-18 11:52:32,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:32,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159495220] [2020-04-18 11:52:32,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:52:32,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159495220] [2020-04-18 11:52:32,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683941808] [2020-04-18 11:52:32,101 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:32,151 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:52:32,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:32,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:52:32,154 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:52:32,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:32,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:32,168 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:32,169 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:32,171 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 29 transitions. [2020-04-18 11:52:32,171 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:32,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:32,172 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:32,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:32,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:52:32,173 INFO L87 Difference]: Start difference. First operand 223 states and 475 transitions. Second operand 11 states. [2020-04-18 11:52:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:32,414 INFO L93 Difference]: Finished difference Result 239 states and 503 transitions. [2020-04-18 11:52:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 503 transitions. [2020-04-18 11:52:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:52:32,416 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:52:32,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:32,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1409325995, now seen corresponding path program 24 times [2020-04-18 11:52:32,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:32,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474178827] [2020-04-18 11:52:32,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:52:32,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474178827] [2020-04-18 11:52:32,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347999378] [2020-04-18 11:52:32,492 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 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 11:52:32,563 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:52:32,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:32,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:52:32,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:52:32,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:32,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:32,582 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:32,583 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:32,585 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-04-18 11:52:32,586 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:32,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:32,634 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:32,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:32,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 11:52:32,636 INFO L87 Difference]: Start difference. First operand 239 states and 503 transitions. Second operand 11 states. [2020-04-18 11:52:32,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:32,957 INFO L93 Difference]: Finished difference Result 246 states and 511 transitions. [2020-04-18 11:52:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 511 transitions. [2020-04-18 11:52:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:52:32,959 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:52:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 25 times [2020-04-18 11:52:32,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:32,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659375689] [2020-04-18 11:52:32,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:33,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659375689] [2020-04-18 11:52:33,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460435763] [2020-04-18 11:52:33,062 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 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 11:52:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:33,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:52:33,105 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:33,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:33,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 11:52:33,114 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:33,115 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:33,117 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:52:33,117 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:33,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:33,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:33,199 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:52:33,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:52:33,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 11:52:33,200 INFO L87 Difference]: Start difference. First operand 246 states and 511 transitions. Second operand 12 states. [2020-04-18 11:52:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:33,481 INFO L93 Difference]: Finished difference Result 345 states and 667 transitions. [2020-04-18 11:52:33,481 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 667 transitions. [2020-04-18 11:52:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:52:33,483 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:52:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:33,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 26 times [2020-04-18 11:52:33,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:33,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114894092] [2020-04-18 11:52:33,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:33,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114894092] [2020-04-18 11:52:33,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420904745] [2020-04-18 11:52:33,588 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 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 11:52:33,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:52:33,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:33,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:52:33,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:33,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:33,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 11:52:33,678 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:33,679 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:33,682 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-04-18 11:52:33,682 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:33,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:33,756 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:33,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:52:33,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1565, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 11:52:33,759 INFO L87 Difference]: Start difference. First operand 345 states and 667 transitions. Second operand 12 states. [2020-04-18 11:52:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:34,162 INFO L93 Difference]: Finished difference Result 431 states and 825 transitions. [2020-04-18 11:52:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 825 transitions. [2020-04-18 11:52:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:52:34,164 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:52:34,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:34,165 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 27 times [2020-04-18 11:52:34,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:34,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14843799] [2020-04-18 11:52:34,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:34,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14843799] [2020-04-18 11:52:34,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858713255] [2020-04-18 11:52:34,295 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 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 11:52:34,351 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 11:52:34,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:34,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:52:34,353 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:34,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:34,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 11:52:34,369 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:34,370 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:34,372 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-04-18 11:52:34,373 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:34,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:34,381 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:34,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:52:34,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 11:52:34,383 INFO L87 Difference]: Start difference. First operand 431 states and 825 transitions. Second operand 12 states. [2020-04-18 11:52:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:34,714 INFO L93 Difference]: Finished difference Result 441 states and 836 transitions. [2020-04-18 11:52:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 836 transitions. [2020-04-18 11:52:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:52:34,716 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:52:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 28 times [2020-04-18 11:52:34,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:34,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592438755] [2020-04-18 11:52:34,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:34,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592438755] [2020-04-18 11:52:34,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878933009] [2020-04-18 11:52:34,820 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 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 11:52:34,869 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:52:34,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:34,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:52:34,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:34,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:34,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 11:52:34,894 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:34,895 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:34,897 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-04-18 11:52:34,897 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:34,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:34,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:34,899 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:34,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:52:34,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 11:52:34,900 INFO L87 Difference]: Start difference. First operand 441 states and 836 transitions. Second operand 12 states. [2020-04-18 11:52:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:35,252 INFO L93 Difference]: Finished difference Result 441 states and 836 transitions. [2020-04-18 11:52:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 836 transitions. [2020-04-18 11:52:35,253 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:35,254 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [592599015] [2020-04-18 11:52:35,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:35,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-04-18 11:52:35,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [592599015] [2020-04-18 11:52:35,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-18 11:52:35,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:52:35,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-18 11:52:35,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 11:52:35,257 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 26 states. [2020-04-18 11:52:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:35,468 INFO L93 Difference]: Finished difference Result 94 states and 231 transitions. [2020-04-18 11:52:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-18 11:52:35,475 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 15 [2020-04-18 11:52:35,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:52:35,476 INFO L225 Difference]: With dead ends: 94 [2020-04-18 11:52:35,476 INFO L226 Difference]: Without dead ends: 70 [2020-04-18 11:52:35,477 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 312 SyntacticMatches, 60 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 11:52:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-18 11:52:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-04-18 11:52:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-18 11:52:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-04-18 11:52:35,483 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 15 [2020-04-18 11:52:35,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:52:35,483 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-04-18 11:52:35,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-18 11:52:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-04-18 11:52:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:52:35,483 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:52:35,484 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:52:37,286 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,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:37,287 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:52:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 29 times [2020-04-18 11:52:37,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:52:37,289 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [513652904] [2020-04-18 11:52:37,290 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:37,291 INFO L259 McrAutomatonBuilder]: Finished intersection with 122 states and 276 transitions. [2020-04-18 11:52:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states. [2020-04-18 11:52:37,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:52:37,293 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:52:37,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:37,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1101535864, now seen corresponding path program 30 times [2020-04-18 11:52:37,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:37,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580211949] [2020-04-18 11:52:37,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 11:52:37,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580211949] [2020-04-18 11:52:37,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:52:37,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:52:37,331 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:37,332 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:37,336 INFO L259 McrAutomatonBuilder]: Finished intersection with 37 states and 56 transitions. [2020-04-18 11:52:37,336 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:37,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:37,372 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:37,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:52:37,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:52:37,372 INFO L87 Difference]: Start difference. First operand 122 states. Second operand 7 states. [2020-04-18 11:52:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:37,490 INFO L93 Difference]: Finished difference Result 190 states and 431 transitions. [2020-04-18 11:52:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 431 transitions. [2020-04-18 11:52:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:52:37,491 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:52:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1559815134, now seen corresponding path program 31 times [2020-04-18 11:52:37,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:37,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955281277] [2020-04-18 11:52:37,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:52:37,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955281277] [2020-04-18 11:52:37,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110617852] [2020-04-18 11:52:37,552 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 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 11:52:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:37,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:52:37,636 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:52:37,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:37,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 11:52:37,660 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:37,661 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:37,669 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 44 transitions. [2020-04-18 11:52:37,670 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:37,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:37,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:37,703 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:37,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:37,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:52:37,704 INFO L87 Difference]: Start difference. First operand 190 states and 431 transitions. Second operand 9 states. [2020-04-18 11:52:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:37,873 INFO L93 Difference]: Finished difference Result 239 states and 538 transitions. [2020-04-18 11:52:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 538 transitions. [2020-04-18 11:52:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:52:37,874 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:52:37,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:37,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1486020228, now seen corresponding path program 32 times [2020-04-18 11:52:37,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:37,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782810555] [2020-04-18 11:52:37,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:52:37,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782810555] [2020-04-18 11:52:37,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174076605] [2020-04-18 11:52:37,940 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 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 11:52:38,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:52:38,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:38,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:52:38,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:52:38,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:38,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 11:52:38,028 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:38,029 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:38,033 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 46 transitions. [2020-04-18 11:52:38,033 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:38,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:38,074 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:38,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:38,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:52:38,075 INFO L87 Difference]: Start difference. First operand 239 states and 538 transitions. Second operand 9 states. [2020-04-18 11:52:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:38,284 INFO L93 Difference]: Finished difference Result 275 states and 613 transitions. [2020-04-18 11:52:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 613 transitions. [2020-04-18 11:52:38,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:52:38,285 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:52:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:38,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1838543578, now seen corresponding path program 33 times [2020-04-18 11:52:38,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:38,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170572491] [2020-04-18 11:52:38,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:38,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170572491] [2020-04-18 11:52:38,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654215203] [2020-04-18 11:52:38,357 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 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 11:52:38,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:52:38,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:38,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:52:38,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:38,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:38,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:38,418 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:38,419 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:38,421 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 38 transitions. [2020-04-18 11:52:38,421 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:38,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:38,455 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:38,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:38,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:52:38,456 INFO L87 Difference]: Start difference. First operand 275 states and 613 transitions. Second operand 11 states. [2020-04-18 11:52:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:38,690 INFO L93 Difference]: Finished difference Result 291 states and 641 transitions. [2020-04-18 11:52:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 641 transitions. [2020-04-18 11:52:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:52:38,692 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:52:38,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:38,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1770159288, now seen corresponding path program 34 times [2020-04-18 11:52:38,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:38,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713193766] [2020-04-18 11:52:38,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:38,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713193766] [2020-04-18 11:52:38,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550043091] [2020-04-18 11:52:38,763 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 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 11:52:38,826 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:52:38,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:38,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:52:38,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:38,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:38,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:38,844 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:38,845 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:38,847 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 36 transitions. [2020-04-18 11:52:38,847 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:38,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:38,849 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:38,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:38,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:52:38,849 INFO L87 Difference]: Start difference. First operand 291 states and 641 transitions. Second operand 11 states. [2020-04-18 11:52:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:39,119 INFO L93 Difference]: Finished difference Result 316 states and 690 transitions. [2020-04-18 11:52:39,119 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 690 transitions. [2020-04-18 11:52:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:52:39,120 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:52:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:39,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2010913258, now seen corresponding path program 35 times [2020-04-18 11:52:39,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:39,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870891110] [2020-04-18 11:52:39,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:39,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870891110] [2020-04-18 11:52:39,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503722474] [2020-04-18 11:52:39,191 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 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 11:52:39,241 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:52:39,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:39,243 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:52:39,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:39,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:39,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:39,257 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:39,258 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:39,261 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 38 transitions. [2020-04-18 11:52:39,261 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:39,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:39,313 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:39,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:39,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 11:52:39,314 INFO L87 Difference]: Start difference. First operand 316 states and 690 transitions. Second operand 11 states. [2020-04-18 11:52:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:39,643 INFO L93 Difference]: Finished difference Result 330 states and 713 transitions. [2020-04-18 11:52:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 713 transitions. [2020-04-18 11:52:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:52:39,644 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:52:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:39,645 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 36 times [2020-04-18 11:52:39,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:39,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632886384] [2020-04-18 11:52:39,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:39,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632886384] [2020-04-18 11:52:39,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513329309] [2020-04-18 11:52:39,735 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 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 11:52:39,790 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 11:52:39,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:39,791 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 11:52:39,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:39,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:39,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 11:52:39,801 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:39,803 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:39,805 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-04-18 11:52:39,805 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:39,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:39,841 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:39,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:52:39,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 11:52:39,842 INFO L87 Difference]: Start difference. First operand 330 states and 713 transitions. Second operand 13 states. [2020-04-18 11:52:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:40,111 INFO L93 Difference]: Finished difference Result 335 states and 718 transitions. [2020-04-18 11:52:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 718 transitions. [2020-04-18 11:52:40,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:52:40,113 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:52:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 37 times [2020-04-18 11:52:40,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:40,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080032474] [2020-04-18 11:52:40,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:40,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080032474] [2020-04-18 11:52:40,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948020021] [2020-04-18 11:52:40,221 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 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 11:52:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:40,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 11:52:40,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:40,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:40,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 11:52:40,282 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:40,283 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:40,286 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-04-18 11:52:40,286 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:40,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:40,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:40,288 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:40,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:52:40,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:52:40,289 INFO L87 Difference]: Start difference. First operand 335 states and 718 transitions. Second operand 13 states. [2020-04-18 11:52:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:40,561 INFO L93 Difference]: Finished difference Result 340 states and 723 transitions. [2020-04-18 11:52:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 723 transitions. [2020-04-18 11:52:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:52:40,562 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:52:40,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:40,563 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 38 times [2020-04-18 11:52:40,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:40,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274528967] [2020-04-18 11:52:40,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:40,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274528967] [2020-04-18 11:52:40,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349149145] [2020-04-18 11:52:40,656 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:40,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:52:40,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:40,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 11:52:40,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:40,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:40,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 11:52:40,753 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:40,756 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:40,760 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-04-18 11:52:40,760 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:40,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:40,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:40,764 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:40,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:52:40,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:52:40,766 INFO L87 Difference]: Start difference. First operand 340 states and 723 transitions. Second operand 13 states. [2020-04-18 11:52:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:41,303 INFO L93 Difference]: Finished difference Result 349 states and 736 transitions. [2020-04-18 11:52:41,303 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 736 transitions. [2020-04-18 11:52:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:52:41,304 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:52:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:41,305 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 39 times [2020-04-18 11:52:41,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:41,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724167078] [2020-04-18 11:52:41,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:41,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724167078] [2020-04-18 11:52:41,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137099322] [2020-04-18 11:52:41,450 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 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 11:52:41,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 11:52:41,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:41,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 11:52:41,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:41,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:41,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 11:52:41,560 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:41,562 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:41,566 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-04-18 11:52:41,566 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:41,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:41,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:41,661 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:41,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:52:41,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 11:52:41,663 INFO L87 Difference]: Start difference. First operand 349 states and 736 transitions. Second operand 13 states. [2020-04-18 11:52:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:42,161 INFO L93 Difference]: Finished difference Result 351 states and 738 transitions. [2020-04-18 11:52:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 738 transitions. [2020-04-18 11:52:42,162 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:42,163 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [513652904] [2020-04-18 11:52:42,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:42,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-04-18 11:52:42,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [513652904] [2020-04-18 11:52:42,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 11:52:42,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:52:42,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 11:52:42,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1281, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 11:52:42,165 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 22 states. [2020-04-18 11:52:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:42,387 INFO L93 Difference]: Finished difference Result 86 states and 211 transitions. [2020-04-18 11:52:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 11:52:42,388 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 16 [2020-04-18 11:52:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:52:42,389 INFO L225 Difference]: With dead ends: 86 [2020-04-18 11:52:42,389 INFO L226 Difference]: Without dead ends: 74 [2020-04-18 11:52:42,390 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 333 SyntacticMatches, 63 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=441, Invalid=1281, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 11:52:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-18 11:52:42,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2020-04-18 11:52:42,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 11:52:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-04-18 11:52:42,394 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 16 [2020-04-18 11:52:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:52:42,395 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-04-18 11:52:42,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-18 11:52:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-04-18 11:52:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:42,395 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:52:42,395 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:52:44,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:44,206 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:52:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:44,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 40 times [2020-04-18 11:52:44,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:52:44,207 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1832933021] [2020-04-18 11:52:44,208 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:44,209 INFO L259 McrAutomatonBuilder]: Finished intersection with 163 states and 378 transitions. [2020-04-18 11:52:44,210 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states. [2020-04-18 11:52:44,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:44,211 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:52:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1412066749, now seen corresponding path program 41 times [2020-04-18 11:52:44,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:44,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621877699] [2020-04-18 11:52:44,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-04-18 11:52:44,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621877699] [2020-04-18 11:52:44,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:52:44,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:52:44,257 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:44,258 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:44,262 INFO L259 McrAutomatonBuilder]: Finished intersection with 43 states and 66 transitions. [2020-04-18 11:52:44,263 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:44,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:44,299 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:44,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:52:44,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:52:44,300 INFO L87 Difference]: Start difference. First operand 163 states. Second operand 7 states. [2020-04-18 11:52:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:44,429 INFO L93 Difference]: Finished difference Result 273 states and 641 transitions. [2020-04-18 11:52:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 641 transitions. [2020-04-18 11:52:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:44,430 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:52:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:44,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1985398233, now seen corresponding path program 42 times [2020-04-18 11:52:44,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:44,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298528943] [2020-04-18 11:52:44,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 11:52:44,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298528943] [2020-04-18 11:52:44,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327850343] [2020-04-18 11:52:44,500 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:44,563 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:52:44,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:44,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:52:44,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 11:52:44,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:44,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 11:52:44,574 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:44,578 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:44,583 INFO L259 McrAutomatonBuilder]: Finished intersection with 36 states and 52 transitions. [2020-04-18 11:52:44,584 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:44,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:44,610 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:44,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:44,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:52:44,611 INFO L87 Difference]: Start difference. First operand 273 states and 641 transitions. Second operand 9 states. [2020-04-18 11:52:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:44,759 INFO L93 Difference]: Finished difference Result 354 states and 828 transitions. [2020-04-18 11:52:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 828 transitions. [2020-04-18 11:52:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:44,760 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:52:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1917013943, now seen corresponding path program 43 times [2020-04-18 11:52:44,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:44,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129301769] [2020-04-18 11:52:44,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 11:52:44,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129301769] [2020-04-18 11:52:44,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893799464] [2020-04-18 11:52:44,814 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:44,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:52:44,864 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 11:52:44,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:44,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 11:52:44,873 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:44,875 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:44,879 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 56 transitions. [2020-04-18 11:52:44,879 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:44,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:44,919 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:44,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:44,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:52:44,920 INFO L87 Difference]: Start difference. First operand 354 states and 828 transitions. Second operand 9 states. [2020-04-18 11:52:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:45,141 INFO L93 Difference]: Finished difference Result 422 states and 983 transitions. [2020-04-18 11:52:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 983 transitions. [2020-04-18 11:52:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:45,143 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:52:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash -39664095, now seen corresponding path program 44 times [2020-04-18 11:52:45,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:45,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365752952] [2020-04-18 11:52:45,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:52:45,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365752952] [2020-04-18 11:52:45,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055037678] [2020-04-18 11:52:45,233 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:45,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:52:45,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:45,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:52:45,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:52:45,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:45,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:45,288 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:45,289 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:45,293 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 46 transitions. [2020-04-18 11:52:45,294 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:45,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:45,323 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:45,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:45,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:52:45,324 INFO L87 Difference]: Start difference. First operand 422 states and 983 transitions. Second operand 11 states. [2020-04-18 11:52:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:45,536 INFO L93 Difference]: Finished difference Result 455 states and 1050 transitions. [2020-04-18 11:52:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1050 transitions. [2020-04-18 11:52:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:45,538 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:52:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2135390211, now seen corresponding path program 45 times [2020-04-18 11:52:45,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:45,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014741694] [2020-04-18 11:52:45,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:52:45,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014741694] [2020-04-18 11:52:45,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899473861] [2020-04-18 11:52:45,610 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:45,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:52:45,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:45,671 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 11:52:45,671 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:52:45,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:45,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:45,682 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:45,683 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:45,687 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 44 transitions. [2020-04-18 11:52:45,687 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:45,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:45,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:45,689 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:45,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:52:45,690 INFO L87 Difference]: Start difference. First operand 455 states and 1050 transitions. Second operand 11 states. [2020-04-18 11:52:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:45,932 INFO L93 Difference]: Finished difference Result 504 states and 1157 transitions. [2020-04-18 11:52:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1157 transitions. [2020-04-18 11:52:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:45,934 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:52:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash 886258277, now seen corresponding path program 46 times [2020-04-18 11:52:45,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:45,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648525155] [2020-04-18 11:52:45,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:52:46,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648525155] [2020-04-18 11:52:46,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994460083] [2020-04-18 11:52:46,018 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 11:52:46,070 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:52:46,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:46,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:52:46,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:52:46,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:46,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 11:52:46,098 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:46,099 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:46,104 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 48 transitions. [2020-04-18 11:52:46,104 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:46,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:46,149 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:46,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:52:46,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 11:52:46,151 INFO L87 Difference]: Start difference. First operand 504 states and 1157 transitions. Second operand 11 states. [2020-04-18 11:52:46,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:46,483 INFO L93 Difference]: Finished difference Result 540 states and 1232 transitions. [2020-04-18 11:52:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1232 transitions. [2020-04-18 11:52:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:46,485 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:52:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:46,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1608806907, now seen corresponding path program 47 times [2020-04-18 11:52:46,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:46,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403382049] [2020-04-18 11:52:46,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:46,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403382049] [2020-04-18 11:52:46,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281185068] [2020-04-18 11:52:46,601 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:52:46,647 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-18 11:52:46,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:46,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 11:52:46,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:46,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:46,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 11:52:46,659 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:46,661 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:46,664 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2020-04-18 11:52:46,665 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:46,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:46,703 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:46,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:52:46,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 11:52:46,704 INFO L87 Difference]: Start difference. First operand 540 states and 1232 transitions. Second operand 13 states. [2020-04-18 11:52:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:47,028 INFO L93 Difference]: Finished difference Result 556 states and 1260 transitions. [2020-04-18 11:52:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1260 transitions. [2020-04-18 11:52:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:47,029 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:52:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash 316013657, now seen corresponding path program 48 times [2020-04-18 11:52:47,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:47,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433929921] [2020-04-18 11:52:47,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:47,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433929921] [2020-04-18 11:52:47,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356795112] [2020-04-18 11:52:47,117 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:47,166 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 11:52:47,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:47,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 11:52:47,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:47,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:47,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 11:52:47,183 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:47,185 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:47,188 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2020-04-18 11:52:47,188 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:47,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:47,190 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:47,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:52:47,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:52:47,191 INFO L87 Difference]: Start difference. First operand 556 states and 1260 transitions. Second operand 13 states. [2020-04-18 11:52:47,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:47,510 INFO L93 Difference]: Finished difference Result 572 states and 1288 transitions. [2020-04-18 11:52:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1288 transitions. [2020-04-18 11:52:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:47,511 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:52:47,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:47,512 INFO L82 PathProgramCache]: Analyzing trace with hash 247629367, now seen corresponding path program 49 times [2020-04-18 11:52:47,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:47,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78326827] [2020-04-18 11:52:47,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:47,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78326827] [2020-04-18 11:52:47,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487384050] [2020-04-18 11:52:47,604 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:47,652 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 11:52:47,653 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:47,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:47,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 11:52:47,667 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:47,668 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:47,671 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2020-04-18 11:52:47,671 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:47,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:47,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:47,672 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:47,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:52:47,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:52:47,673 INFO L87 Difference]: Start difference. First operand 572 states and 1288 transitions. Second operand 13 states. [2020-04-18 11:52:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:48,052 INFO L93 Difference]: Finished difference Result 597 states and 1337 transitions. [2020-04-18 11:52:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1337 transitions. [2020-04-18 11:52:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:48,054 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:52:48,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:48,054 INFO L82 PathProgramCache]: Analyzing trace with hash 761524117, now seen corresponding path program 50 times [2020-04-18 11:52:48,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:48,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353594677] [2020-04-18 11:52:48,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:48,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353594677] [2020-04-18 11:52:48,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27137138] [2020-04-18 11:52:48,133 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:48,177 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:52:48,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:48,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 11:52:48,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 11:52:48,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:48,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 11:52:48,191 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:48,192 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:48,195 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2020-04-18 11:52:48,195 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:48,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:48,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:48,240 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:48,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:52:48,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 11:52:48,241 INFO L87 Difference]: Start difference. First operand 597 states and 1337 transitions. Second operand 13 states. [2020-04-18 11:52:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:48,680 INFO L93 Difference]: Finished difference Result 611 states and 1360 transitions. [2020-04-18 11:52:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1360 transitions. [2020-04-18 11:52:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:48,682 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:52:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:48,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 51 times [2020-04-18 11:52:48,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:48,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473817183] [2020-04-18 11:52:48,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:48,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473817183] [2020-04-18 11:52:48,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13719539] [2020-04-18 11:52:48,812 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:48,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-18 11:52:48,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:48,875 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 11:52:48,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:48,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:48,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-18 11:52:48,889 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:48,890 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:48,894 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-04-18 11:52:48,894 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:48,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:48,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:48,977 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:52:48,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:52:48,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=1419, Unknown=0, NotChecked=0, Total=1892 [2020-04-18 11:52:48,978 INFO L87 Difference]: Start difference. First operand 611 states and 1360 transitions. Second operand 15 states. [2020-04-18 11:52:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:49,326 INFO L93 Difference]: Finished difference Result 616 states and 1365 transitions. [2020-04-18 11:52:49,326 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1365 transitions. [2020-04-18 11:52:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:49,328 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:52:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:49,328 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 52 times [2020-04-18 11:52:49,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:49,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132777978] [2020-04-18 11:52:49,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:49,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132777978] [2020-04-18 11:52:49,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205195630] [2020-04-18 11:52:49,444 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:49,488 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:52:49,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:49,490 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 11:52:49,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:49,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:49,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-18 11:52:49,511 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:49,513 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:49,516 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-04-18 11:52:49,516 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:49,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:49,518 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:49,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:52:49,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=1569, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 11:52:49,519 INFO L87 Difference]: Start difference. First operand 616 states and 1365 transitions. Second operand 15 states. [2020-04-18 11:52:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:49,995 INFO L93 Difference]: Finished difference Result 621 states and 1370 transitions. [2020-04-18 11:52:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1370 transitions. [2020-04-18 11:52:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:49,997 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:52:49,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:49,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 53 times [2020-04-18 11:52:49,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:49,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061199836] [2020-04-18 11:52:49,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:50,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061199836] [2020-04-18 11:52:50,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111153921] [2020-04-18 11:52:50,091 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:50,142 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-18 11:52:50,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:50,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 11:52:50,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:50,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:50,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-18 11:52:50,154 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:50,155 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:50,158 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-04-18 11:52:50,159 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:50,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:50,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:50,161 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:50,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:52:50,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=1569, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 11:52:50,162 INFO L87 Difference]: Start difference. First operand 621 states and 1370 transitions. Second operand 15 states. [2020-04-18 11:52:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:50,638 INFO L93 Difference]: Finished difference Result 626 states and 1375 transitions. [2020-04-18 11:52:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1375 transitions. [2020-04-18 11:52:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:50,639 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:52:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 54 times [2020-04-18 11:52:50,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:50,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414523708] [2020-04-18 11:52:50,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:50,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414523708] [2020-04-18 11:52:50,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420458123] [2020-04-18 11:52:50,753 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:50,824 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-18 11:52:50,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:50,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 11:52:50,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:50,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:50,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-18 11:52:50,854 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:50,856 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:50,859 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-04-18 11:52:50,859 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:50,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:50,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:50,862 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:50,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:52:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=1569, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 11:52:50,863 INFO L87 Difference]: Start difference. First operand 626 states and 1375 transitions. Second operand 15 states. [2020-04-18 11:52:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:51,393 INFO L93 Difference]: Finished difference Result 635 states and 1388 transitions. [2020-04-18 11:52:51,393 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1388 transitions. [2020-04-18 11:52:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:51,394 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:52:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:51,395 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 55 times [2020-04-18 11:52:51,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:51,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501183413] [2020-04-18 11:52:51,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:51,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501183413] [2020-04-18 11:52:51,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285834609] [2020-04-18 11:52:51,485 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:51,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 11:52:51,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:51,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:51,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-18 11:52:51,555 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:51,556 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:51,559 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-04-18 11:52:51,559 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:51,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:51,616 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:52:51,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1759, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 11:52:51,618 INFO L87 Difference]: Start difference. First operand 635 states and 1388 transitions. Second operand 15 states. [2020-04-18 11:52:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:52,187 INFO L93 Difference]: Finished difference Result 639 states and 1391 transitions. [2020-04-18 11:52:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1391 transitions. [2020-04-18 11:52:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:52:52,189 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 11:52:52,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:52,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 56 times [2020-04-18 11:52:52,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:52,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498068915] [2020-04-18 11:52:52,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:52,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498068915] [2020-04-18 11:52:52,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753375322] [2020-04-18 11:52:52,288 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:52,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:52:52,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:52,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 11:52:52,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:52,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:52,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:52,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-18 11:52:52,371 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:52,373 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:52,375 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-04-18 11:52:52,376 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:52,436 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:52:52,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:52:52,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=2296, Unknown=0, NotChecked=0, Total=2970 [2020-04-18 11:52:52,438 INFO L87 Difference]: Start difference. First operand 639 states and 1391 transitions. Second operand 15 states. [2020-04-18 11:52:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:53,268 INFO L93 Difference]: Finished difference Result 920 states and 2009 transitions. [2020-04-18 11:52:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2009 transitions. [2020-04-18 11:52:53,269 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:53,270 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1832933021] [2020-04-18 11:52:53,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:53,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-04-18 11:52:53,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1832933021] [2020-04-18 11:52:53,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-04-18 11:52:53,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:52:53,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-04-18 11:52:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1570, Invalid=4130, Unknown=0, NotChecked=0, Total=5700 [2020-04-18 11:52:53,273 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 32 states. [2020-04-18 11:52:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:53,749 INFO L93 Difference]: Finished difference Result 102 states and 249 transitions. [2020-04-18 11:52:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-18 11:52:53,749 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 18 [2020-04-18 11:52:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:52:53,750 INFO L225 Difference]: With dead ends: 102 [2020-04-18 11:52:53,750 INFO L226 Difference]: Without dead ends: 79 [2020-04-18 11:52:53,751 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 602 SyntacticMatches, 129 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4943 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1570, Invalid=4130, Unknown=0, NotChecked=0, Total=5700 [2020-04-18 11:52:53,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-18 11:52:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2020-04-18 11:52:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-18 11:52:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-04-18 11:52:53,757 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 18 [2020-04-18 11:52:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:52:53,757 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-04-18 11:52:53,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-04-18 11:52:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-04-18 11:52:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 11:52:53,758 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:52:53,758 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:52:56,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:56,774 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:52:56,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:56,774 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 57 times [2020-04-18 11:52:56,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:52:56,775 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1047333696] [2020-04-18 11:52:56,775 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:56,776 INFO L259 McrAutomatonBuilder]: Finished intersection with 186 states and 435 transitions. [2020-04-18 11:52:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2020-04-18 11:52:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 11:52:56,778 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:52:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:56,778 INFO L82 PathProgramCache]: Analyzing trace with hash 44477432, now seen corresponding path program 58 times [2020-04-18 11:52:56,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:56,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269759079] [2020-04-18 11:52:56,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-18 11:52:56,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269759079] [2020-04-18 11:52:56,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728804140] [2020-04-18 11:52:56,844 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 11:52:56,907 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:52:56,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:56,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:52:56,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-18 11:52:56,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:56,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-04-18 11:52:56,920 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:56,924 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:56,930 INFO L259 McrAutomatonBuilder]: Finished intersection with 47 states and 73 transitions. [2020-04-18 11:52:56,930 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:56,968 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:52:56,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:56,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-04-18 11:52:56,968 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 9 states. [2020-04-18 11:52:56,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:56,995 INFO L93 Difference]: Finished difference Result 186 states and 435 transitions. [2020-04-18 11:52:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 435 transitions. [2020-04-18 11:52:56,996 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:56,996 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1047333696] [2020-04-18 11:52:56,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:52:56,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 11:52:56,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1047333696] [2020-04-18 11:52:56,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-18 11:52:56,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:52:56,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:52:56,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-04-18 11:52:56,997 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 9 states. [2020-04-18 11:52:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:57,011 INFO L93 Difference]: Finished difference Result 119 states and 258 transitions. [2020-04-18 11:52:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 11:52:57,011 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-04-18 11:52:57,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:52:57,012 INFO L225 Difference]: With dead ends: 119 [2020-04-18 11:52:57,012 INFO L226 Difference]: Without dead ends: 0 [2020-04-18 11:52:57,012 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-04-18 11:52:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-18 11:52:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-18 11:52:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-18 11:52:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-18 11:52:57,013 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-04-18 11:52:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:52:57,013 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-18 11:52:57,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-18 11:52:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-18 11:52:57,013 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:52:57,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:57,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 11:52:57 BasicIcfg [2020-04-18 11:52:57,218 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 11:52:57,220 INFO L168 Benchmark]: Toolchain (without parser) took 37694.51 ms. Allocated memory was 135.8 MB in the beginning and 481.3 MB in the end (delta: 345.5 MB). Free memory was 98.9 MB in the beginning and 314.3 MB in the end (delta: -215.4 MB). Peak memory consumption was 130.1 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:57,221 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-04-18 11:52:57,221 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.83 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 96.8 MB in the beginning and 158.9 MB in the end (delta: -62.0 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:57,221 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.81 ms. Allocated memory is still 199.8 MB. Free memory was 158.9 MB in the beginning and 156.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:57,222 INFO L168 Benchmark]: Boogie Preprocessor took 59.95 ms. Allocated memory is still 199.8 MB. Free memory was 156.8 MB in the beginning and 155.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:57,222 INFO L168 Benchmark]: RCFGBuilder took 422.69 ms. Allocated memory is still 199.8 MB. Free memory was 155.4 MB in the beginning and 135.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:57,223 INFO L168 Benchmark]: TraceAbstraction took 36473.87 ms. Allocated memory was 199.8 MB in the beginning and 481.3 MB in the end (delta: 281.5 MB). Free memory was 134.8 MB in the beginning and 314.3 MB in the end (delta: -179.5 MB). Peak memory consumption was 102.0 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:57,225 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 637.83 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 96.8 MB in the beginning and 158.9 MB in the end (delta: -62.0 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 74.81 ms. Allocated memory is still 199.8 MB. Free memory was 158.9 MB in the beginning and 156.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.95 ms. Allocated memory is still 199.8 MB. Free memory was 156.8 MB in the beginning and 155.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 422.69 ms. Allocated memory is still 199.8 MB. Free memory was 155.4 MB in the beginning and 135.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36473.87 ms. Allocated memory was 199.8 MB in the beginning and 481.3 MB in the end (delta: 281.5 MB). Free memory was 134.8 MB in the beginning and 314.3 MB in the end (delta: -179.5 MB). Peak memory consumption was 102.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 36.3s, OverallIterations: 10, TraceHistogramMax: 6, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 166 SDtfs, 605 SDslu, 643 SDs, 0 SdLazy, 638 SolverSat, 302 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2153 GetRequests, 1588 SyntacticMatches, 299 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10042 ImplicationChecksByTransitivity, 6.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 120 StatesRemovedByMinimization, 8 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 proved your program to be correct! Received shutdown request...