/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-divine/condvar.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 15:55:12,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 15:55:12,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 15:55:12,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 15:55:12,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 15:55:12,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 15:55:12,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 15:55:12,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 15:55:12,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 15:55:12,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 15:55:12,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 15:55:12,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 15:55:12,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 15:55:12,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 15:55:12,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 15:55:12,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 15:55:12,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 15:55:12,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 15:55:12,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 15:55:12,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 15:55:12,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 15:55:12,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 15:55:12,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 15:55:12,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 15:55:12,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 15:55:12,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 15:55:12,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 15:55:12,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 15:55:12,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 15:55:12,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 15:55:12,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 15:55:12,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 15:55:12,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 15:55:12,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 15:55:12,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 15:55:12,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 15:55:12,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 15:55:12,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 15:55:12,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 15:55:12,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 15:55:12,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 15:55:12,419 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 15:55:12,444 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 15:55:12,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 15:55:12,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 15:55:12,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 15:55:12,446 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 15:55:12,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 15:55:12,446 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 15:55:12,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 15:55:12,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 15:55:12,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 15:55:12,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 15:55:12,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 15:55:12,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 15:55:12,448 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 15:55:12,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 15:55:12,448 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 15:55:12,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 15:55:12,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 15:55:12,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 15:55:12,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 15:55:12,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 15:55:12,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 15:55:12,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 15:55:12,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 15:55:12,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 15:55:12,450 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 15:55:12,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 15:55:12,451 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-18 15:55:12,451 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 15:55:12,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 15:55:12,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 15:55:12,740 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 15:55:12,758 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 15:55:12,761 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 15:55:12,762 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 15:55:12,762 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 15:55:12,763 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/condvar.i [2020-04-18 15:55:12,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4904218a/e847d89698f343358ec516d7c99304c0/FLAG00385bd46 [2020-04-18 15:55:13,302 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 15:55:13,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/condvar.i [2020-04-18 15:55:13,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4904218a/e847d89698f343358ec516d7c99304c0/FLAG00385bd46 [2020-04-18 15:55:13,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4904218a/e847d89698f343358ec516d7c99304c0 [2020-04-18 15:55:13,633 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 15:55:13,657 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 15:55:13,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 15:55:13,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 15:55:13,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 15:55:13,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:55:13" (1/1) ... [2020-04-18 15:55:13,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@740288de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:13, skipping insertion in model container [2020-04-18 15:55:13,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:55:13" (1/1) ... [2020-04-18 15:55:13,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 15:55:13,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 15:55:13,904 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-04-18 15:55:14,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 15:55:14,199 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 15:55:14,217 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-04-18 15:55:14,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 15:55:14,334 INFO L208 MainTranslator]: Completed translation [2020-04-18 15:55:14,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14 WrapperNode [2020-04-18 15:55:14,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 15:55:14,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 15:55:14,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 15:55:14,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 15:55:14,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14" (1/1) ... [2020-04-18 15:55:14,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14" (1/1) ... [2020-04-18 15:55:14,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 15:55:14,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 15:55:14,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 15:55:14,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 15:55:14,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14" (1/1) ... [2020-04-18 15:55:14,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14" (1/1) ... [2020-04-18 15:55:14,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14" (1/1) ... [2020-04-18 15:55:14,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14" (1/1) ... [2020-04-18 15:55:14,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14" (1/1) ... [2020-04-18 15:55:14,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14" (1/1) ... [2020-04-18 15:55:14,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14" (1/1) ... [2020-04-18 15:55:14,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 15:55:14,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 15:55:14,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 15:55:14,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 15:55:14,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14" (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 15:55:14,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-18 15:55:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 15:55:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-04-18 15:55:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 15:55:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 15:55:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-04-18 15:55:14,479 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2020-04-18 15:55:14,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2020-04-18 15:55:14,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 15:55:14,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 15:55:14,481 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 15:55:14,848 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 15:55:14,848 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 15:55:14,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:55:14 BoogieIcfgContainer [2020-04-18 15:55:14,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 15:55:14,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 15:55:14,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 15:55:14,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 15:55:14,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 03:55:13" (1/3) ... [2020-04-18 15:55:14,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24db7ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:55:14, skipping insertion in model container [2020-04-18 15:55:14,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:55:14" (2/3) ... [2020-04-18 15:55:14,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24db7ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:55:14, skipping insertion in model container [2020-04-18 15:55:14,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:55:14" (3/3) ... [2020-04-18 15:55:14,861 INFO L109 eAbstractionObserver]: Analyzing ICFG condvar.i [2020-04-18 15:55:14,869 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 15:55:14,870 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 15:55:14,876 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 15:55:14,876 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 15:55:14,894 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,895 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,895 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,895 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,896 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,896 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,896 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,897 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,897 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,897 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,900 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,901 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,901 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,901 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,901 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,902 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:55:14,919 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 15:55:14,935 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 15:55:14,935 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 15:55:14,935 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 15:55:14,935 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 15:55:14,935 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 15:55:14,935 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 15:55:14,936 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 15:55:14,936 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 15:55:14,949 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 59 transitions, 126 flow [2020-04-18 15:55:14,951 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2020-04-18 15:55:14,990 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-04-18 15:55:14,991 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-18 15:55:14,995 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 58 events. 5/58 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2020-04-18 15:55:14,997 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2020-04-18 15:55:15,016 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-04-18 15:55:15,017 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-18 15:55:15,017 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 58 events. 5/58 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2020-04-18 15:55:15,019 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 352 [2020-04-18 15:55:15,020 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-18 15:55:16,126 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-04-18 15:55:16,613 WARN L192 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-04-18 15:55:16,739 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-04-18 15:55:16,743 INFO L206 etLargeBlockEncoding]: Checked pairs total: 354 [2020-04-18 15:55:16,743 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-04-18 15:55:16,747 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-04-18 15:55:16,755 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 19 states. [2020-04-18 15:55:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-04-18 15:55:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-04-18 15:55:16,764 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:16,764 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-04-18 15:55:16,765 INFO L427 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:16,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:16,770 INFO L82 PathProgramCache]: Analyzing trace with hash 225592945, now seen corresponding path program 1 times [2020-04-18 15:55:16,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:16,775 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1670120738] [2020-04-18 15:55:16,789 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:16,800 INFO L259 McrAutomatonBuilder]: Finished intersection with 6 states and 5 transitions. [2020-04-18 15:55:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-04-18 15:55:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-04-18 15:55:16,802 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:16,803 INFO L82 PathProgramCache]: Analyzing trace with hash 225592945, now seen corresponding path program 2 times [2020-04-18 15:55:16,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:16,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277150947] [2020-04-18 15:55:16,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:16,990 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 15:55:16,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277150947] [2020-04-18 15:55:16,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:55:16,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 15:55:16,992 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:16,993 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:16,994 INFO L259 McrAutomatonBuilder]: Finished intersection with 6 states and 5 transitions. [2020-04-18 15:55:16,994 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:16,999 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 15:55:17,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:55:17,005 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2020-04-18 15:55:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:17,007 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2020-04-18 15:55:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2020-04-18 15:55:17,008 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:17,009 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1670120738] [2020-04-18 15:55:17,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:17,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:17,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1670120738] [2020-04-18 15:55:17,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 15:55:17,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:17,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 15:55:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:55:17,016 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-04-18 15:55:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:17,041 INFO L93 Difference]: Finished difference Result 13 states and 19 transitions. [2020-04-18 15:55:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 15:55:17,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-04-18 15:55:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:17,058 INFO L225 Difference]: With dead ends: 13 [2020-04-18 15:55:17,058 INFO L226 Difference]: Without dead ends: 10 [2020-04-18 15:55:17,062 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:55:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-04-18 15:55:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-04-18 15:55:17,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-04-18 15:55:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 16 transitions. [2020-04-18 15:55:17,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 16 transitions. Word has length 5 [2020-04-18 15:55:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:17,092 INFO L479 AbstractCegarLoop]: Abstraction has 10 states and 16 transitions. [2020-04-18 15:55:17,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 15:55:17,093 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 16 transitions. [2020-04-18 15:55:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-04-18 15:55:17,093 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:17,094 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:17,094 INFO L427 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:17,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:17,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2032051994, now seen corresponding path program 1 times [2020-04-18 15:55:17,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:17,095 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1976020977] [2020-04-18 15:55:17,095 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:17,096 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 19 transitions. [2020-04-18 15:55:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-04-18 15:55:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-04-18 15:55:17,098 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:17,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2032047044, now seen corresponding path program 2 times [2020-04-18 15:55:17,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:17,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143110309] [2020-04-18 15:55:17,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:17,193 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 15:55:17,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143110309] [2020-04-18 15:55:17,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:55:17,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 15:55:17,194 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:17,195 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:17,201 INFO L259 McrAutomatonBuilder]: Finished intersection with 12 states and 15 transitions. [2020-04-18 15:55:17,201 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:17,212 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:17,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:55:17,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:55:17,213 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2020-04-18 15:55:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:17,224 INFO L93 Difference]: Finished difference Result 14 states and 19 transitions. [2020-04-18 15:55:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2020-04-18 15:55:17,225 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:17,225 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1976020977] [2020-04-18 15:55:17,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:17,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:17,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1976020977] [2020-04-18 15:55:17,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 15:55:17,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:17,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:55:17,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:55:17,227 INFO L87 Difference]: Start difference. First operand 10 states and 16 transitions. Second operand 4 states. [2020-04-18 15:55:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:17,240 INFO L93 Difference]: Finished difference Result 12 states and 20 transitions. [2020-04-18 15:55:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 15:55:17,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-04-18 15:55:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:17,242 INFO L225 Difference]: With dead ends: 12 [2020-04-18 15:55:17,242 INFO L226 Difference]: Without dead ends: 12 [2020-04-18 15:55:17,243 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:55:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-04-18 15:55:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-04-18 15:55:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-04-18 15:55:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 20 transitions. [2020-04-18 15:55:17,247 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 20 transitions. Word has length 7 [2020-04-18 15:55:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:17,247 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 20 transitions. [2020-04-18 15:55:17,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 15:55:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 20 transitions. [2020-04-18 15:55:17,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 15:55:17,248 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:17,248 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:17,248 INFO L427 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:17,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1430445622, now seen corresponding path program 1 times [2020-04-18 15:55:17,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:17,249 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1115734309] [2020-04-18 15:55:17,250 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:17,251 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 26 transitions. [2020-04-18 15:55:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-04-18 15:55:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 15:55:17,252 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:17,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1431050422, now seen corresponding path program 2 times [2020-04-18 15:55:17,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:17,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882609990] [2020-04-18 15:55:17,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:17,352 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 15:55:17,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882609990] [2020-04-18 15:55:17,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97203469] [2020-04-18 15:55:17,353 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:17,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:17,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:17,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:17,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:17,448 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 15:55:17,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:17,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2020-04-18 15:55:17,449 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:17,451 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:17,453 INFO L259 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2020-04-18 15:55:17,455 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:17,467 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:17,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:55:17,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-18 15:55:17,468 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-04-18 15:55:17,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:17,494 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2020-04-18 15:55:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2020-04-18 15:55:17,494 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:17,495 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1115734309] [2020-04-18 15:55:17,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:17,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:17,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1115734309] [2020-04-18 15:55:17,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-18 15:55:17,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:17,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:55:17,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:55:17,497 INFO L87 Difference]: Start difference. First operand 12 states and 20 transitions. Second operand 5 states. [2020-04-18 15:55:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:17,520 INFO L93 Difference]: Finished difference Result 14 states and 24 transitions. [2020-04-18 15:55:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 15:55:17,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-18 15:55:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:17,523 INFO L225 Difference]: With dead ends: 14 [2020-04-18 15:55:17,523 INFO L226 Difference]: Without dead ends: 14 [2020-04-18 15:55:17,523 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:55:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-04-18 15:55:17,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-04-18 15:55:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-04-18 15:55:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 24 transitions. [2020-04-18 15:55:17,529 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 24 transitions. Word has length 8 [2020-04-18 15:55:17,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:17,531 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 24 transitions. [2020-04-18 15:55:17,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-18 15:55:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 24 transitions. [2020-04-18 15:55:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 15:55:17,532 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:17,532 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:17,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:17,733 INFO L427 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:17,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1393689318, now seen corresponding path program 3 times [2020-04-18 15:55:17,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:17,736 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [988211937] [2020-04-18 15:55:17,736 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:17,737 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 33 transitions. [2020-04-18 15:55:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 15:55:17,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 15:55:17,739 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1412889468, now seen corresponding path program 4 times [2020-04-18 15:55:17,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:17,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038314399] [2020-04-18 15:55:17,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:17,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038314399] [2020-04-18 15:55:17,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744663380] [2020-04-18 15:55:17,803 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:55:17,868 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:55:17,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:17,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-18 15:55:17,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:17,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:55:17,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-04-18 15:55:17,888 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:17,889 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:17,891 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 15 transitions. [2020-04-18 15:55:17,891 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:17,912 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:17,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 15:55:17,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-04-18 15:55:17,913 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-04-18 15:55:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:17,937 INFO L93 Difference]: Finished difference Result 22 states and 33 transitions. [2020-04-18 15:55:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2020-04-18 15:55:17,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:17,938 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [988211937] [2020-04-18 15:55:17,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:17,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 15:55:17,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [988211937] [2020-04-18 15:55:17,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 15:55:17,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:17,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 15:55:17,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-04-18 15:55:17,940 INFO L87 Difference]: Start difference. First operand 14 states and 24 transitions. Second operand 6 states. [2020-04-18 15:55:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:17,963 INFO L93 Difference]: Finished difference Result 16 states and 28 transitions. [2020-04-18 15:55:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 15:55:17,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-04-18 15:55:17,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:17,964 INFO L225 Difference]: With dead ends: 16 [2020-04-18 15:55:17,965 INFO L226 Difference]: Without dead ends: 16 [2020-04-18 15:55:17,965 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-04-18 15:55:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-04-18 15:55:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-04-18 15:55:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-04-18 15:55:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 28 transitions. [2020-04-18 15:55:17,970 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 28 transitions. Word has length 9 [2020-04-18 15:55:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:17,970 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 28 transitions. [2020-04-18 15:55:17,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 15:55:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 28 transitions. [2020-04-18 15:55:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 15:55:17,973 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:17,973 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:18,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:18,175 INFO L427 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:18,175 INFO L82 PathProgramCache]: Analyzing trace with hash -254243894, now seen corresponding path program 5 times [2020-04-18 15:55:18,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:18,176 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1717959609] [2020-04-18 15:55:18,177 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:18,178 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 40 transitions. [2020-04-18 15:55:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-04-18 15:55:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 15:55:18,179 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:18,180 INFO L82 PathProgramCache]: Analyzing trace with hash -849899894, now seen corresponding path program 6 times [2020-04-18 15:55:18,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:18,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163293126] [2020-04-18 15:55:18,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:18,247 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 15:55:18,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163293126] [2020-04-18 15:55:18,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501032890] [2020-04-18 15:55:18,248 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 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 15:55:18,297 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:55:18,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:18,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:18,299 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:18,307 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 15:55:18,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:18,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2020-04-18 15:55:18,308 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:18,309 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:18,310 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 16 transitions. [2020-04-18 15:55:18,311 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:18,333 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 15:55:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:55:18,333 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2020-04-18 15:55:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:18,393 INFO L93 Difference]: Finished difference Result 26 states and 40 transitions. [2020-04-18 15:55:18,394 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 40 transitions. [2020-04-18 15:55:18,396 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:18,396 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1717959609] [2020-04-18 15:55:18,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:18,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:18,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1717959609] [2020-04-18 15:55:18,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 15:55:18,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:18,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 15:55:18,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-04-18 15:55:18,398 INFO L87 Difference]: Start difference. First operand 16 states and 28 transitions. Second operand 7 states. [2020-04-18 15:55:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:18,446 INFO L93 Difference]: Finished difference Result 18 states and 32 transitions. [2020-04-18 15:55:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 15:55:18,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-04-18 15:55:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:18,450 INFO L225 Difference]: With dead ends: 18 [2020-04-18 15:55:18,450 INFO L226 Difference]: Without dead ends: 18 [2020-04-18 15:55:18,450 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-04-18 15:55:18,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-04-18 15:55:18,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-04-18 15:55:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-04-18 15:55:18,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2020-04-18 15:55:18,453 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2020-04-18 15:55:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:18,453 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2020-04-18 15:55:18,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 15:55:18,453 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2020-04-18 15:55:18,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 15:55:18,454 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:18,454 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:18,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:18,656 INFO L427 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash 708825882, now seen corresponding path program 7 times [2020-04-18 15:55:18,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:18,658 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [230203990] [2020-04-18 15:55:18,658 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:18,660 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 47 transitions. [2020-04-18 15:55:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-04-18 15:55:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 15:55:18,661 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:18,661 INFO L82 PathProgramCache]: Analyzing trace with hash -577092284, now seen corresponding path program 8 times [2020-04-18 15:55:18,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:18,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303742581] [2020-04-18 15:55:18,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:18,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303742581] [2020-04-18 15:55:18,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795770269] [2020-04-18 15:55:18,737 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 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 15:55:18,793 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:18,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:18,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:18,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-18 15:55:18,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:18,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2020-04-18 15:55:18,807 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:18,808 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:18,810 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 17 transitions. [2020-04-18 15:55:18,810 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:18,845 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:18,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 15:55:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-04-18 15:55:18,846 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 8 states. [2020-04-18 15:55:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:18,921 INFO L93 Difference]: Finished difference Result 30 states and 47 transitions. [2020-04-18 15:55:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 47 transitions. [2020-04-18 15:55:18,922 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:18,923 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [230203990] [2020-04-18 15:55:18,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:18,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:18,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [230203990] [2020-04-18 15:55:18,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 15:55:18,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 15:55:18,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-04-18 15:55:18,924 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand 8 states. [2020-04-18 15:55:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:18,967 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-04-18 15:55:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 15:55:18,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-18 15:55:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:18,968 INFO L225 Difference]: With dead ends: 20 [2020-04-18 15:55:18,968 INFO L226 Difference]: Without dead ends: 20 [2020-04-18 15:55:18,969 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-04-18 15:55:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-04-18 15:55:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-04-18 15:55:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-04-18 15:55:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-04-18 15:55:18,973 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 11 [2020-04-18 15:55:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:18,973 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-04-18 15:55:18,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 15:55:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-04-18 15:55:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 15:55:18,974 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:18,974 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:19,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:19,178 INFO L427 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:19,179 INFO L82 PathProgramCache]: Analyzing trace with hash 499217866, now seen corresponding path program 9 times [2020-04-18 15:55:19,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:19,180 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [461064577] [2020-04-18 15:55:19,180 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:19,181 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 54 transitions. [2020-04-18 15:55:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-04-18 15:55:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 15:55:19,182 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:19,183 INFO L82 PathProgramCache]: Analyzing trace with hash -709990966, now seen corresponding path program 10 times [2020-04-18 15:55:19,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:19,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441041889] [2020-04-18 15:55:19,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:19,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441041889] [2020-04-18 15:55:19,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378804707] [2020-04-18 15:55:19,254 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:19,303 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:55:19,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:19,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 15:55:19,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:19,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:55:19,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-18 15:55:19,317 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:19,318 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:19,320 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 18 transitions. [2020-04-18 15:55:19,320 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:19,359 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:19,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 15:55:19,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-04-18 15:55:19,360 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 9 states. [2020-04-18 15:55:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:19,401 INFO L93 Difference]: Finished difference Result 34 states and 54 transitions. [2020-04-18 15:55:19,401 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 54 transitions. [2020-04-18 15:55:19,403 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:19,403 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [461064577] [2020-04-18 15:55:19,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:19,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 15:55:19,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [461064577] [2020-04-18 15:55:19,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-18 15:55:19,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:19,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 15:55:19,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-04-18 15:55:19,408 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 9 states. [2020-04-18 15:55:19,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:19,431 INFO L93 Difference]: Finished difference Result 22 states and 40 transitions. [2020-04-18 15:55:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 15:55:19,431 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-18 15:55:19,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:19,432 INFO L225 Difference]: With dead ends: 22 [2020-04-18 15:55:19,432 INFO L226 Difference]: Without dead ends: 22 [2020-04-18 15:55:19,432 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-04-18 15:55:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-04-18 15:55:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-04-18 15:55:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-04-18 15:55:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2020-04-18 15:55:19,436 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 12 [2020-04-18 15:55:19,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:19,436 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2020-04-18 15:55:19,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-18 15:55:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2020-04-18 15:55:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 15:55:19,437 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:19,437 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:19,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:19,641 INFO L427 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:19,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:19,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1703663334, now seen corresponding path program 11 times [2020-04-18 15:55:19,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:19,643 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1918973741] [2020-04-18 15:55:19,644 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:19,645 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 61 transitions. [2020-04-18 15:55:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-04-18 15:55:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 15:55:19,646 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:19,647 INFO L82 PathProgramCache]: Analyzing trace with hash -534882812, now seen corresponding path program 12 times [2020-04-18 15:55:19,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:19,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808615129] [2020-04-18 15:55:19,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:19,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808615129] [2020-04-18 15:55:19,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584235797] [2020-04-18 15:55:19,723 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 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 15:55:19,771 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:55:19,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:19,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:19,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-04-18 15:55:19,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:19,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2020-04-18 15:55:19,799 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:19,800 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:19,802 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 19 transitions. [2020-04-18 15:55:19,802 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:19,851 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:19,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 15:55:19,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-04-18 15:55:19,852 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 10 states. [2020-04-18 15:55:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:19,966 INFO L93 Difference]: Finished difference Result 38 states and 61 transitions. [2020-04-18 15:55:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 61 transitions. [2020-04-18 15:55:19,966 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:19,967 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1918973741] [2020-04-18 15:55:19,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:19,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:19,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1918973741] [2020-04-18 15:55:19,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-18 15:55:19,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:19,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 15:55:19,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-04-18 15:55:19,968 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand 10 states. [2020-04-18 15:55:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:20,017 INFO L93 Difference]: Finished difference Result 24 states and 44 transitions. [2020-04-18 15:55:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-18 15:55:20,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-18 15:55:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:20,018 INFO L225 Difference]: With dead ends: 24 [2020-04-18 15:55:20,018 INFO L226 Difference]: Without dead ends: 24 [2020-04-18 15:55:20,019 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-04-18 15:55:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-04-18 15:55:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-04-18 15:55:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-04-18 15:55:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-04-18 15:55:20,022 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 13 [2020-04-18 15:55:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:20,023 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-04-18 15:55:20,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-18 15:55:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-04-18 15:55:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 15:55:20,024 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:20,024 INFO L425 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:20,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:20,230 INFO L427 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:20,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:20,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1273503798, now seen corresponding path program 13 times [2020-04-18 15:55:20,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:20,232 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [966817000] [2020-04-18 15:55:20,233 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:20,233 INFO L259 McrAutomatonBuilder]: Finished intersection with 42 states and 68 transitions. [2020-04-18 15:55:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-04-18 15:55:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 15:55:20,235 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:20,236 INFO L82 PathProgramCache]: Analyzing trace with hash 598502666, now seen corresponding path program 14 times [2020-04-18 15:55:20,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:20,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439488918] [2020-04-18 15:55:20,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:20,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439488918] [2020-04-18 15:55:20,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338836310] [2020-04-18 15:55:20,321 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:20,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:20,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:20,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:20,377 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-04-18 15:55:20,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:20,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 11 [2020-04-18 15:55:20,389 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:20,393 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:20,395 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 20 transitions. [2020-04-18 15:55:20,395 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:20,456 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:20,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 15:55:20,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-04-18 15:55:20,457 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 11 states. [2020-04-18 15:55:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:20,573 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-04-18 15:55:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 68 transitions. [2020-04-18 15:55:20,573 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:20,574 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [966817000] [2020-04-18 15:55:20,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:20,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:20,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [966817000] [2020-04-18 15:55:20,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 15:55:20,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:20,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 15:55:20,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-04-18 15:55:20,575 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 11 states. [2020-04-18 15:55:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:20,646 INFO L93 Difference]: Finished difference Result 26 states and 48 transitions. [2020-04-18 15:55:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 15:55:20,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-18 15:55:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:20,647 INFO L225 Difference]: With dead ends: 26 [2020-04-18 15:55:20,647 INFO L226 Difference]: Without dead ends: 26 [2020-04-18 15:55:20,648 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-04-18 15:55:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-04-18 15:55:20,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-04-18 15:55:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-04-18 15:55:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 48 transitions. [2020-04-18 15:55:20,651 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 48 transitions. Word has length 14 [2020-04-18 15:55:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:20,652 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 48 transitions. [2020-04-18 15:55:20,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 15:55:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 48 transitions. [2020-04-18 15:55:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:55:20,652 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:20,652 INFO L425 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:20,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:20,860 INFO L427 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:20,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:20,860 INFO L82 PathProgramCache]: Analyzing trace with hash -823460070, now seen corresponding path program 15 times [2020-04-18 15:55:20,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:20,861 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [250928480] [2020-04-18 15:55:20,862 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:20,864 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 75 transitions. [2020-04-18 15:55:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-04-18 15:55:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:55:20,866 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:20,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:20,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1373714116, now seen corresponding path program 16 times [2020-04-18 15:55:20,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:20,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353701931] [2020-04-18 15:55:20,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:20,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353701931] [2020-04-18 15:55:20,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632509153] [2020-04-18 15:55:20,973 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 15:55:21,019 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:55:21,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:21,020 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 15:55:21,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:21,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:55:21,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-18 15:55:21,050 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:21,051 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:21,052 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 21 transitions. [2020-04-18 15:55:21,053 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:21,116 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:21,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 15:55:21,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-04-18 15:55:21,118 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 12 states. [2020-04-18 15:55:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:21,189 INFO L93 Difference]: Finished difference Result 46 states and 75 transitions. [2020-04-18 15:55:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 75 transitions. [2020-04-18 15:55:21,189 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:21,190 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [250928480] [2020-04-18 15:55:21,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:21,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-04-18 15:55:21,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [250928480] [2020-04-18 15:55:21,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 15:55:21,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:21,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 15:55:21,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-04-18 15:55:21,191 INFO L87 Difference]: Start difference. First operand 26 states and 48 transitions. Second operand 12 states. [2020-04-18 15:55:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:21,224 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-04-18 15:55:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 15:55:21,225 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-18 15:55:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:21,226 INFO L225 Difference]: With dead ends: 28 [2020-04-18 15:55:21,226 INFO L226 Difference]: Without dead ends: 28 [2020-04-18 15:55:21,226 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-04-18 15:55:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-04-18 15:55:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-04-18 15:55:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-04-18 15:55:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2020-04-18 15:55:21,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 15 [2020-04-18 15:55:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:21,231 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2020-04-18 15:55:21,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 15:55:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2020-04-18 15:55:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 15:55:21,231 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:21,232 INFO L425 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:21,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:21,439 INFO L427 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:21,440 INFO L82 PathProgramCache]: Analyzing trace with hash 242993610, now seen corresponding path program 17 times [2020-04-18 15:55:21,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:21,441 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1174609385] [2020-04-18 15:55:21,442 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:21,443 INFO L259 McrAutomatonBuilder]: Finished intersection with 50 states and 82 transitions. [2020-04-18 15:55:21,444 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-04-18 15:55:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 15:55:21,444 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:21,445 INFO L82 PathProgramCache]: Analyzing trace with hash -364534710, now seen corresponding path program 18 times [2020-04-18 15:55:21,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:21,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313771132] [2020-04-18 15:55:21,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:21,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313771132] [2020-04-18 15:55:21,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422125866] [2020-04-18 15:55:21,569 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:21,614 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:55:21,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:21,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:21,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-04-18 15:55:21,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:21,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 13 [2020-04-18 15:55:21,623 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:21,624 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:21,626 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 22 transitions. [2020-04-18 15:55:21,626 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:21,686 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:21,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 15:55:21,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-04-18 15:55:21,687 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 13 states. [2020-04-18 15:55:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:21,863 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2020-04-18 15:55:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 82 transitions. [2020-04-18 15:55:21,863 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:21,864 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1174609385] [2020-04-18 15:55:21,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:21,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:21,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1174609385] [2020-04-18 15:55:21,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-18 15:55:21,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:21,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 15:55:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-04-18 15:55:21,866 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand 13 states. [2020-04-18 15:55:21,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:21,944 INFO L93 Difference]: Finished difference Result 30 states and 56 transitions. [2020-04-18 15:55:21,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 15:55:21,945 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-18 15:55:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:21,946 INFO L225 Difference]: With dead ends: 30 [2020-04-18 15:55:21,946 INFO L226 Difference]: Without dead ends: 30 [2020-04-18 15:55:21,947 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-04-18 15:55:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-04-18 15:55:21,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-04-18 15:55:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-04-18 15:55:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2020-04-18 15:55:21,951 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 16 [2020-04-18 15:55:21,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:21,951 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2020-04-18 15:55:21,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-18 15:55:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2020-04-18 15:55:21,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 15:55:21,952 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:21,952 INFO L425 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:22,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:22,154 INFO L427 AbstractCegarLoop]: === Iteration 12 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:22,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:22,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1056680678, now seen corresponding path program 19 times [2020-04-18 15:55:22,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:22,156 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1521889364] [2020-04-18 15:55:22,157 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:22,157 INFO L259 McrAutomatonBuilder]: Finished intersection with 54 states and 89 transitions. [2020-04-18 15:55:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-04-18 15:55:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 15:55:22,158 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:22,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1584326532, now seen corresponding path program 20 times [2020-04-18 15:55:22,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:22,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549428732] [2020-04-18 15:55:22,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:22,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549428732] [2020-04-18 15:55:22,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757658855] [2020-04-18 15:55:22,292 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 15:55:22,366 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:22,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:22,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:22,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-04-18 15:55:22,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:22,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2020-04-18 15:55:22,385 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:22,389 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:22,392 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-04-18 15:55:22,392 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:22,524 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:22,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 15:55:22,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-04-18 15:55:22,525 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 14 states. [2020-04-18 15:55:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:22,805 INFO L93 Difference]: Finished difference Result 54 states and 89 transitions. [2020-04-18 15:55:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 89 transitions. [2020-04-18 15:55:22,806 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:22,806 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1521889364] [2020-04-18 15:55:22,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:22,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:22,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1521889364] [2020-04-18 15:55:22,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 15:55:22,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:22,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 15:55:22,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-04-18 15:55:22,809 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand 14 states. [2020-04-18 15:55:22,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:22,880 INFO L93 Difference]: Finished difference Result 32 states and 60 transitions. [2020-04-18 15:55:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-18 15:55:22,881 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-18 15:55:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:22,882 INFO L225 Difference]: With dead ends: 32 [2020-04-18 15:55:22,882 INFO L226 Difference]: Without dead ends: 32 [2020-04-18 15:55:22,883 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-04-18 15:55:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-04-18 15:55:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-04-18 15:55:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-04-18 15:55:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2020-04-18 15:55:22,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 17 [2020-04-18 15:55:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:22,891 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2020-04-18 15:55:22,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 15:55:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2020-04-18 15:55:22,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 15:55:22,892 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:22,893 INFO L425 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:23,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:23,100 INFO L427 AbstractCegarLoop]: === Iteration 13 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:23,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1603089354, now seen corresponding path program 21 times [2020-04-18 15:55:23,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:23,101 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [138940652] [2020-04-18 15:55:23,103 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:23,104 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 96 transitions. [2020-04-18 15:55:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 15:55:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 15:55:23,107 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1869482890, now seen corresponding path program 22 times [2020-04-18 15:55:23,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:23,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954036123] [2020-04-18 15:55:23,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:23,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954036123] [2020-04-18 15:55:23,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503580969] [2020-04-18 15:55:23,349 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 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 15:55:23,425 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:55:23,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:23,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 15:55:23,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:23,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:55:23,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-18 15:55:23,442 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:23,443 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:23,444 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 24 transitions. [2020-04-18 15:55:23,445 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:23,539 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 15:55:23,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 15:55:23,540 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 15 states. [2020-04-18 15:55:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:23,634 INFO L93 Difference]: Finished difference Result 58 states and 96 transitions. [2020-04-18 15:55:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 96 transitions. [2020-04-18 15:55:23,635 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:23,635 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [138940652] [2020-04-18 15:55:23,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:23,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-04-18 15:55:23,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [138940652] [2020-04-18 15:55:23,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 15:55:23,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:23,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 15:55:23,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 15:55:23,637 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand 15 states. [2020-04-18 15:55:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:23,676 INFO L93 Difference]: Finished difference Result 34 states and 64 transitions. [2020-04-18 15:55:23,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-18 15:55:23,676 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-18 15:55:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:23,677 INFO L225 Difference]: With dead ends: 34 [2020-04-18 15:55:23,677 INFO L226 Difference]: Without dead ends: 34 [2020-04-18 15:55:23,678 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 15:55:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-04-18 15:55:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-04-18 15:55:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-18 15:55:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 64 transitions. [2020-04-18 15:55:23,682 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 64 transitions. Word has length 18 [2020-04-18 15:55:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:23,683 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 64 transitions. [2020-04-18 15:55:23,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 15:55:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 64 transitions. [2020-04-18 15:55:23,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 15:55:23,683 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:23,684 INFO L425 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:23,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:23,892 INFO L427 AbstractCegarLoop]: === Iteration 14 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:23,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1843385574, now seen corresponding path program 23 times [2020-04-18 15:55:23,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:23,893 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1472574500] [2020-04-18 15:55:23,894 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:23,895 INFO L259 McrAutomatonBuilder]: Finished intersection with 62 states and 103 transitions. [2020-04-18 15:55:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-04-18 15:55:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 15:55:23,896 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:23,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2119395396, now seen corresponding path program 24 times [2020-04-18 15:55:23,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:23,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696930196] [2020-04-18 15:55:23,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:24,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696930196] [2020-04-18 15:55:24,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901859996] [2020-04-18 15:55:24,026 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 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 15:55:24,066 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:55:24,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:24,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:24,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-04-18 15:55:24,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:24,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [14] total 16 [2020-04-18 15:55:24,091 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:24,092 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:24,094 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 25 transitions. [2020-04-18 15:55:24,094 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:24,191 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:24,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 15:55:24,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-04-18 15:55:24,192 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 16 states. [2020-04-18 15:55:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:24,438 INFO L93 Difference]: Finished difference Result 62 states and 103 transitions. [2020-04-18 15:55:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 103 transitions. [2020-04-18 15:55:24,439 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:24,439 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1472574500] [2020-04-18 15:55:24,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:24,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:24,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1472574500] [2020-04-18 15:55:24,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 15:55:24,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:24,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 15:55:24,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-04-18 15:55:24,440 INFO L87 Difference]: Start difference. First operand 34 states and 64 transitions. Second operand 16 states. [2020-04-18 15:55:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:24,532 INFO L93 Difference]: Finished difference Result 36 states and 68 transitions. [2020-04-18 15:55:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 15:55:24,533 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-18 15:55:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:24,534 INFO L225 Difference]: With dead ends: 36 [2020-04-18 15:55:24,534 INFO L226 Difference]: Without dead ends: 36 [2020-04-18 15:55:24,535 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-04-18 15:55:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-04-18 15:55:24,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-04-18 15:55:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-04-18 15:55:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2020-04-18 15:55:24,539 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 19 [2020-04-18 15:55:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:24,540 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2020-04-18 15:55:24,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 15:55:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2020-04-18 15:55:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-18 15:55:24,540 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:24,540 INFO L425 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:24,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:24,744 INFO L427 AbstractCegarLoop]: === Iteration 15 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:24,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1309925942, now seen corresponding path program 25 times [2020-04-18 15:55:24,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:24,745 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [672446610] [2020-04-18 15:55:24,747 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:24,747 INFO L259 McrAutomatonBuilder]: Finished intersection with 66 states and 110 transitions. [2020-04-18 15:55:24,748 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-04-18 15:55:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-18 15:55:24,748 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:24,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:24,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1276748490, now seen corresponding path program 26 times [2020-04-18 15:55:24,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:24,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461103696] [2020-04-18 15:55:24,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:24,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461103696] [2020-04-18 15:55:24,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679967475] [2020-04-18 15:55:24,899 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:24,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:24,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:24,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:24,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-04-18 15:55:24,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:24,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [15] total 17 [2020-04-18 15:55:24,948 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:24,949 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:24,950 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 26 transitions. [2020-04-18 15:55:24,951 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:25,051 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:25,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 15:55:25,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-04-18 15:55:25,051 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 17 states. [2020-04-18 15:55:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:25,332 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-04-18 15:55:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 110 transitions. [2020-04-18 15:55:25,332 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:25,333 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [672446610] [2020-04-18 15:55:25,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:25,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:25,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [672446610] [2020-04-18 15:55:25,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 15:55:25,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:25,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 15:55:25,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-04-18 15:55:25,335 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand 17 states. [2020-04-18 15:55:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:25,450 INFO L93 Difference]: Finished difference Result 38 states and 72 transitions. [2020-04-18 15:55:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 15:55:25,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-18 15:55:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:25,451 INFO L225 Difference]: With dead ends: 38 [2020-04-18 15:55:25,451 INFO L226 Difference]: Without dead ends: 38 [2020-04-18 15:55:25,452 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-04-18 15:55:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-04-18 15:55:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-04-18 15:55:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-04-18 15:55:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 72 transitions. [2020-04-18 15:55:25,459 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 72 transitions. Word has length 20 [2020-04-18 15:55:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:25,459 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 72 transitions. [2020-04-18 15:55:25,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 15:55:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 72 transitions. [2020-04-18 15:55:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:55:25,460 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:25,460 INFO L425 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:25,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:25,666 INFO L427 AbstractCegarLoop]: === Iteration 16 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:25,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1952546534, now seen corresponding path program 27 times [2020-04-18 15:55:25,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:25,667 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1608109481] [2020-04-18 15:55:25,668 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:25,669 INFO L259 McrAutomatonBuilder]: Finished intersection with 70 states and 117 transitions. [2020-04-18 15:55:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-04-18 15:55:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:55:25,670 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash 924498180, now seen corresponding path program 28 times [2020-04-18 15:55:25,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:25,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006741126] [2020-04-18 15:55:25,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:25,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006741126] [2020-04-18 15:55:25,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867629325] [2020-04-18 15:55:25,811 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 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 15:55:25,858 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:55:25,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:25,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 15:55:25,861 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:25,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:55:25,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-18 15:55:25,875 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:25,876 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:25,878 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 27 transitions. [2020-04-18 15:55:25,878 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:25,993 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:25,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 15:55:25,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-18 15:55:25,994 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 18 states. [2020-04-18 15:55:26,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:26,152 INFO L93 Difference]: Finished difference Result 70 states and 117 transitions. [2020-04-18 15:55:26,152 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 117 transitions. [2020-04-18 15:55:26,152 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:26,153 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1608109481] [2020-04-18 15:55:26,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:26,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-04-18 15:55:26,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1608109481] [2020-04-18 15:55:26,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 15:55:26,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:26,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 15:55:26,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-18 15:55:26,164 INFO L87 Difference]: Start difference. First operand 38 states and 72 transitions. Second operand 18 states. [2020-04-18 15:55:26,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:26,223 INFO L93 Difference]: Finished difference Result 40 states and 76 transitions. [2020-04-18 15:55:26,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 15:55:26,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-18 15:55:26,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:26,225 INFO L225 Difference]: With dead ends: 40 [2020-04-18 15:55:26,225 INFO L226 Difference]: Without dead ends: 40 [2020-04-18 15:55:26,225 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-18 15:55:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-04-18 15:55:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-04-18 15:55:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-18 15:55:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2020-04-18 15:55:26,229 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 21 [2020-04-18 15:55:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:26,229 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2020-04-18 15:55:26,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 15:55:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2020-04-18 15:55:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 15:55:26,230 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:26,230 INFO L425 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:26,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:26,434 INFO L427 AbstractCegarLoop]: === Iteration 17 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:26,434 INFO L82 PathProgramCache]: Analyzing trace with hash -398948406, now seen corresponding path program 29 times [2020-04-18 15:55:26,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:26,435 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1045352875] [2020-04-18 15:55:26,436 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:26,437 INFO L259 McrAutomatonBuilder]: Finished intersection with 74 states and 124 transitions. [2020-04-18 15:55:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-04-18 15:55:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 15:55:26,439 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:26,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:26,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1405326838, now seen corresponding path program 30 times [2020-04-18 15:55:26,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:26,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564040889] [2020-04-18 15:55:26,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:26,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564040889] [2020-04-18 15:55:26,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642538926] [2020-04-18 15:55:26,605 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 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 15:55:26,663 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:55:26,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:26,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:26,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-04-18 15:55:26,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:26,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [17] total 19 [2020-04-18 15:55:26,689 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:26,690 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:26,692 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 28 transitions. [2020-04-18 15:55:26,692 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:26,897 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:26,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 15:55:26,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-04-18 15:55:26,898 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 19 states. [2020-04-18 15:55:27,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:27,229 INFO L93 Difference]: Finished difference Result 74 states and 124 transitions. [2020-04-18 15:55:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 124 transitions. [2020-04-18 15:55:27,229 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:27,230 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1045352875] [2020-04-18 15:55:27,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:27,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:27,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1045352875] [2020-04-18 15:55:27,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 15:55:27,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:27,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 15:55:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 15:55:27,234 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 19 states. [2020-04-18 15:55:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:27,335 INFO L93 Difference]: Finished difference Result 42 states and 80 transitions. [2020-04-18 15:55:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-18 15:55:27,335 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-18 15:55:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:27,336 INFO L225 Difference]: With dead ends: 42 [2020-04-18 15:55:27,336 INFO L226 Difference]: Without dead ends: 42 [2020-04-18 15:55:27,337 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 15:55:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-18 15:55:27,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-18 15:55:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 15:55:27,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 80 transitions. [2020-04-18 15:55:27,340 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 80 transitions. Word has length 22 [2020-04-18 15:55:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:27,340 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 80 transitions. [2020-04-18 15:55:27,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 15:55:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 80 transitions. [2020-04-18 15:55:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-18 15:55:27,341 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:27,341 INFO L425 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:27,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:27,544 INFO L427 AbstractCegarLoop]: === Iteration 18 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:27,545 INFO L82 PathProgramCache]: Analyzing trace with hash 517953306, now seen corresponding path program 31 times [2020-04-18 15:55:27,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:27,546 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [173035108] [2020-04-18 15:55:27,547 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:27,548 INFO L259 McrAutomatonBuilder]: Finished intersection with 78 states and 131 transitions. [2020-04-18 15:55:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2020-04-18 15:55:27,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-18 15:55:27,549 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash -615458364, now seen corresponding path program 32 times [2020-04-18 15:55:27,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:27,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427896453] [2020-04-18 15:55:27,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:27,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427896453] [2020-04-18 15:55:27,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228531531] [2020-04-18 15:55:27,721 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 15:55:27,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:27,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:27,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:27,783 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-04-18 15:55:27,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:27,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [18] total 20 [2020-04-18 15:55:27,797 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:27,799 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:27,801 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 29 transitions. [2020-04-18 15:55:27,801 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:27,977 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 15:55:27,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-04-18 15:55:27,978 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 20 states. [2020-04-18 15:55:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:28,344 INFO L93 Difference]: Finished difference Result 78 states and 131 transitions. [2020-04-18 15:55:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 131 transitions. [2020-04-18 15:55:28,345 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:28,345 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [173035108] [2020-04-18 15:55:28,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:28,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:28,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [173035108] [2020-04-18 15:55:28,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 15:55:28,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:28,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 15:55:28,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 15:55:28,347 INFO L87 Difference]: Start difference. First operand 42 states and 80 transitions. Second operand 20 states. [2020-04-18 15:55:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:28,445 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-04-18 15:55:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 15:55:28,446 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-18 15:55:28,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:28,447 INFO L225 Difference]: With dead ends: 44 [2020-04-18 15:55:28,447 INFO L226 Difference]: Without dead ends: 44 [2020-04-18 15:55:28,448 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 15:55:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-04-18 15:55:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-04-18 15:55:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-18 15:55:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 84 transitions. [2020-04-18 15:55:28,451 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 84 transitions. Word has length 23 [2020-04-18 15:55:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:28,452 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 84 transitions. [2020-04-18 15:55:28,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 15:55:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 84 transitions. [2020-04-18 15:55:28,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-18 15:55:28,452 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:28,452 INFO L425 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:28,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:28,653 INFO L427 AbstractCegarLoop]: === Iteration 19 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:28,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1122864694, now seen corresponding path program 33 times [2020-04-18 15:55:28,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:28,655 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1057388225] [2020-04-18 15:55:28,656 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:28,657 INFO L259 McrAutomatonBuilder]: Finished intersection with 82 states and 138 transitions. [2020-04-18 15:55:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states. [2020-04-18 15:55:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-18 15:55:28,658 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:28,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:28,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1899339446, now seen corresponding path program 34 times [2020-04-18 15:55:28,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:28,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98948410] [2020-04-18 15:55:28,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:28,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98948410] [2020-04-18 15:55:28,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033090655] [2020-04-18 15:55:28,835 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 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 15:55:28,885 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:55:28,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:28,886 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 15:55:28,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:28,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:55:28,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-18 15:55:28,906 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:28,907 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:28,909 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 30 transitions. [2020-04-18 15:55:28,909 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:29,078 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:29,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 15:55:29,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 15:55:29,079 INFO L87 Difference]: Start difference. First operand 82 states. Second operand 21 states. [2020-04-18 15:55:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:29,243 INFO L93 Difference]: Finished difference Result 82 states and 138 transitions. [2020-04-18 15:55:29,243 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 138 transitions. [2020-04-18 15:55:29,243 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:29,244 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1057388225] [2020-04-18 15:55:29,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:29,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-04-18 15:55:29,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1057388225] [2020-04-18 15:55:29,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 15:55:29,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 15:55:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 15:55:29,246 INFO L87 Difference]: Start difference. First operand 44 states and 84 transitions. Second operand 21 states. [2020-04-18 15:55:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:29,308 INFO L93 Difference]: Finished difference Result 46 states and 88 transitions. [2020-04-18 15:55:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 15:55:29,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-18 15:55:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:29,309 INFO L225 Difference]: With dead ends: 46 [2020-04-18 15:55:29,309 INFO L226 Difference]: Without dead ends: 46 [2020-04-18 15:55:29,309 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 15:55:29,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-04-18 15:55:29,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-04-18 15:55:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-18 15:55:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-04-18 15:55:29,320 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 24 [2020-04-18 15:55:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:29,321 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-04-18 15:55:29,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 15:55:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-04-18 15:55:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-18 15:55:29,322 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:29,322 INFO L425 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:29,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:29,523 INFO L427 AbstractCegarLoop]: === Iteration 20 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:29,523 INFO L82 PathProgramCache]: Analyzing trace with hash -448615142, now seen corresponding path program 35 times [2020-04-18 15:55:29,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:29,524 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [642553395] [2020-04-18 15:55:29,525 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:29,526 INFO L259 McrAutomatonBuilder]: Finished intersection with 86 states and 145 transitions. [2020-04-18 15:55:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-04-18 15:55:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-18 15:55:29,527 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:29,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1250019972, now seen corresponding path program 36 times [2020-04-18 15:55:29,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:29,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563076712] [2020-04-18 15:55:29,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:29,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563076712] [2020-04-18 15:55:29,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355811681] [2020-04-18 15:55:29,779 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 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 15:55:29,823 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:55:29,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:29,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:29,825 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-04-18 15:55:29,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:29,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [20] total 22 [2020-04-18 15:55:29,847 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:29,849 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:29,851 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 31 transitions. [2020-04-18 15:55:29,852 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:30,027 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:30,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 15:55:30,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-04-18 15:55:30,028 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 22 states. [2020-04-18 15:55:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:30,471 INFO L93 Difference]: Finished difference Result 86 states and 145 transitions. [2020-04-18 15:55:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 145 transitions. [2020-04-18 15:55:30,472 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:30,473 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [642553395] [2020-04-18 15:55:30,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:30,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:30,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [642553395] [2020-04-18 15:55:30,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 15:55:30,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:30,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 15:55:30,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 15:55:30,475 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 22 states. [2020-04-18 15:55:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:30,612 INFO L93 Difference]: Finished difference Result 48 states and 92 transitions. [2020-04-18 15:55:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-18 15:55:30,612 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-18 15:55:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:30,613 INFO L225 Difference]: With dead ends: 48 [2020-04-18 15:55:30,613 INFO L226 Difference]: Without dead ends: 48 [2020-04-18 15:55:30,614 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 15:55:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-18 15:55:30,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-04-18 15:55:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-18 15:55:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 92 transitions. [2020-04-18 15:55:30,618 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 92 transitions. Word has length 25 [2020-04-18 15:55:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:30,618 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 92 transitions. [2020-04-18 15:55:30,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-18 15:55:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 92 transitions. [2020-04-18 15:55:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-18 15:55:30,618 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:30,619 INFO L425 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:30,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:30,822 INFO L427 AbstractCegarLoop]: === Iteration 21 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1021715510, now seen corresponding path program 37 times [2020-04-18 15:55:30,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:30,823 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1975445035] [2020-04-18 15:55:30,824 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:30,825 INFO L259 McrAutomatonBuilder]: Finished intersection with 90 states and 152 transitions. [2020-04-18 15:55:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2020-04-18 15:55:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-18 15:55:30,827 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:30,827 INFO L82 PathProgramCache]: Analyzing trace with hash 95914122, now seen corresponding path program 38 times [2020-04-18 15:55:30,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:30,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545569342] [2020-04-18 15:55:30,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:31,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545569342] [2020-04-18 15:55:31,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992230902] [2020-04-18 15:55:31,060 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:31,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:31,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:31,106 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:31,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-04-18 15:55:31,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:31,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [21] total 23 [2020-04-18 15:55:31,126 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:31,128 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:31,131 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 32 transitions. [2020-04-18 15:55:31,132 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:31,351 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:31,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 15:55:31,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-04-18 15:55:31,352 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 23 states. [2020-04-18 15:55:31,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:31,870 INFO L93 Difference]: Finished difference Result 90 states and 152 transitions. [2020-04-18 15:55:31,870 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 152 transitions. [2020-04-18 15:55:31,870 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:31,871 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1975445035] [2020-04-18 15:55:31,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:31,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:31,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1975445035] [2020-04-18 15:55:31,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 15:55:31,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:31,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 15:55:31,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 15:55:31,872 INFO L87 Difference]: Start difference. First operand 48 states and 92 transitions. Second operand 23 states. [2020-04-18 15:55:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:31,993 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2020-04-18 15:55:31,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 15:55:31,994 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-18 15:55:31,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:31,995 INFO L225 Difference]: With dead ends: 50 [2020-04-18 15:55:31,995 INFO L226 Difference]: Without dead ends: 50 [2020-04-18 15:55:31,996 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 15:55:31,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-18 15:55:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-04-18 15:55:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 15:55:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2020-04-18 15:55:31,999 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 26 [2020-04-18 15:55:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:31,999 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2020-04-18 15:55:31,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 15:55:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2020-04-18 15:55:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 15:55:32,000 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:32,000 INFO L425 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:32,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:32,203 INFO L427 AbstractCegarLoop]: === Iteration 22 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:32,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1607957734, now seen corresponding path program 39 times [2020-04-18 15:55:32,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:32,205 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1082040245] [2020-04-18 15:55:32,206 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:32,207 INFO L259 McrAutomatonBuilder]: Finished intersection with 94 states and 159 transitions. [2020-04-18 15:55:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-04-18 15:55:32,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 15:55:32,208 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:32,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1321628860, now seen corresponding path program 40 times [2020-04-18 15:55:32,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:32,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833770570] [2020-04-18 15:55:32,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:32,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833770570] [2020-04-18 15:55:32,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769944171] [2020-04-18 15:55:32,465 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:32,520 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:55:32,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:32,521 INFO L264 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-18 15:55:32,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:32,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:55:32,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-18 15:55:32,538 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:32,540 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:32,542 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 33 transitions. [2020-04-18 15:55:32,542 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:32,801 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:32,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 15:55:32,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-04-18 15:55:32,801 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 24 states. [2020-04-18 15:55:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:33,043 INFO L93 Difference]: Finished difference Result 94 states and 159 transitions. [2020-04-18 15:55:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 159 transitions. [2020-04-18 15:55:33,044 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:33,044 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1082040245] [2020-04-18 15:55:33,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:33,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-04-18 15:55:33,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1082040245] [2020-04-18 15:55:33,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 15:55:33,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 15:55:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-04-18 15:55:33,046 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand 24 states. [2020-04-18 15:55:33,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:33,101 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2020-04-18 15:55:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 15:55:33,101 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-18 15:55:33,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:33,102 INFO L225 Difference]: With dead ends: 52 [2020-04-18 15:55:33,102 INFO L226 Difference]: Without dead ends: 52 [2020-04-18 15:55:33,103 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-04-18 15:55:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-04-18 15:55:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-04-18 15:55:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-18 15:55:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2020-04-18 15:55:33,106 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 27 [2020-04-18 15:55:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:33,106 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2020-04-18 15:55:33,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 15:55:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2020-04-18 15:55:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 15:55:33,107 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:33,107 INFO L425 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:33,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:33,310 INFO L427 AbstractCegarLoop]: === Iteration 23 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:33,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1693369802, now seen corresponding path program 41 times [2020-04-18 15:55:33,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:33,311 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1714656894] [2020-04-18 15:55:33,312 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:33,314 INFO L259 McrAutomatonBuilder]: Finished intersection with 98 states and 166 transitions. [2020-04-18 15:55:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2020-04-18 15:55:33,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 15:55:33,315 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:33,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:33,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1979178954, now seen corresponding path program 42 times [2020-04-18 15:55:33,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:33,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676773101] [2020-04-18 15:55:33,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:33,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676773101] [2020-04-18 15:55:33,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540907079] [2020-04-18 15:55:33,549 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 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 15:55:33,592 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:55:33,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:33,593 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:33,593 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-04-18 15:55:33,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:33,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [23] total 25 [2020-04-18 15:55:33,607 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:33,609 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:33,611 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 34 transitions. [2020-04-18 15:55:33,611 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:33,842 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 15:55:33,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-04-18 15:55:33,843 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 25 states. [2020-04-18 15:55:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:34,374 INFO L93 Difference]: Finished difference Result 98 states and 166 transitions. [2020-04-18 15:55:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 166 transitions. [2020-04-18 15:55:34,374 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:34,375 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1714656894] [2020-04-18 15:55:34,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:34,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:34,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1714656894] [2020-04-18 15:55:34,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 15:55:34,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:34,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 15:55:34,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 15:55:34,377 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand 25 states. [2020-04-18 15:55:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:34,515 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-04-18 15:55:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-18 15:55:34,516 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-18 15:55:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:34,517 INFO L225 Difference]: With dead ends: 54 [2020-04-18 15:55:34,517 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 15:55:34,518 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 15:55:34,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 15:55:34,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-04-18 15:55:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-18 15:55:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 104 transitions. [2020-04-18 15:55:34,522 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 104 transitions. Word has length 28 [2020-04-18 15:55:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:34,522 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 104 transitions. [2020-04-18 15:55:34,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 15:55:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 104 transitions. [2020-04-18 15:55:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-18 15:55:34,522 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:34,522 INFO L425 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:34,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:34,723 INFO L427 AbstractCegarLoop]: === Iteration 24 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:34,724 INFO L82 PathProgramCache]: Analyzing trace with hash 955308314, now seen corresponding path program 43 times [2020-04-18 15:55:34,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:34,725 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1618376291] [2020-04-18 15:55:34,726 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:34,727 INFO L259 McrAutomatonBuilder]: Finished intersection with 102 states and 173 transitions. [2020-04-18 15:55:34,728 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states. [2020-04-18 15:55:34,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-18 15:55:34,729 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1225006084, now seen corresponding path program 44 times [2020-04-18 15:55:34,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:34,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902522546] [2020-04-18 15:55:34,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:35,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902522546] [2020-04-18 15:55:35,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295878384] [2020-04-18 15:55:35,069 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 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 15:55:35,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:35,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:35,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:35,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-04-18 15:55:35,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:35,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [24] total 26 [2020-04-18 15:55:35,128 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:35,132 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:35,135 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2020-04-18 15:55:35,135 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:35,362 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:35,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-18 15:55:35,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-04-18 15:55:35,362 INFO L87 Difference]: Start difference. First operand 102 states. Second operand 26 states. [2020-04-18 15:55:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:35,958 INFO L93 Difference]: Finished difference Result 102 states and 173 transitions. [2020-04-18 15:55:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 173 transitions. [2020-04-18 15:55:35,958 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:35,959 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1618376291] [2020-04-18 15:55:35,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:35,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:35,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1618376291] [2020-04-18 15:55:35,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-18 15:55:35,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:35,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-18 15:55:35,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 15:55:35,962 INFO L87 Difference]: Start difference. First operand 54 states and 104 transitions. Second operand 26 states. [2020-04-18 15:55:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:36,068 INFO L93 Difference]: Finished difference Result 56 states and 108 transitions. [2020-04-18 15:55:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 15:55:36,069 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-18 15:55:36,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:36,070 INFO L225 Difference]: With dead ends: 56 [2020-04-18 15:55:36,070 INFO L226 Difference]: Without dead ends: 56 [2020-04-18 15:55:36,071 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 15:55:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-04-18 15:55:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-04-18 15:55:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-18 15:55:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 108 transitions. [2020-04-18 15:55:36,075 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 108 transitions. Word has length 29 [2020-04-18 15:55:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:36,075 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 108 transitions. [2020-04-18 15:55:36,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-18 15:55:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 108 transitions. [2020-04-18 15:55:36,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 15:55:36,076 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:36,076 INFO L425 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:36,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:36,279 INFO L427 AbstractCegarLoop]: === Iteration 25 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:36,280 INFO L82 PathProgramCache]: Analyzing trace with hash -449761334, now seen corresponding path program 45 times [2020-04-18 15:55:36,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:36,281 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [34367217] [2020-04-18 15:55:36,282 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:36,282 INFO L259 McrAutomatonBuilder]: Finished intersection with 106 states and 180 transitions. [2020-04-18 15:55:36,283 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2020-04-18 15:55:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 15:55:36,284 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:36,284 INFO L82 PathProgramCache]: Analyzing trace with hash -679516406, now seen corresponding path program 46 times [2020-04-18 15:55:36,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:36,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639186782] [2020-04-18 15:55:36,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:36,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639186782] [2020-04-18 15:55:36,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089707922] [2020-04-18 15:55:36,697 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:36,779 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:55:36,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:36,780 INFO L264 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-18 15:55:36,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:36,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:55:36,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-04-18 15:55:36,808 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:36,810 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:36,813 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 36 transitions. [2020-04-18 15:55:36,813 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:37,108 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:37,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 15:55:37,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-04-18 15:55:37,109 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 27 states. [2020-04-18 15:55:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:37,395 INFO L93 Difference]: Finished difference Result 106 states and 180 transitions. [2020-04-18 15:55:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 180 transitions. [2020-04-18 15:55:37,395 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:37,396 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [34367217] [2020-04-18 15:55:37,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:37,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-04-18 15:55:37,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [34367217] [2020-04-18 15:55:37,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-18 15:55:37,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:37,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 15:55:37,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-04-18 15:55:37,397 INFO L87 Difference]: Start difference. First operand 56 states and 108 transitions. Second operand 27 states. [2020-04-18 15:55:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:37,470 INFO L93 Difference]: Finished difference Result 58 states and 112 transitions. [2020-04-18 15:55:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 15:55:37,470 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-18 15:55:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:37,471 INFO L225 Difference]: With dead ends: 58 [2020-04-18 15:55:37,471 INFO L226 Difference]: Without dead ends: 58 [2020-04-18 15:55:37,472 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-04-18 15:55:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-18 15:55:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-04-18 15:55:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-18 15:55:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 112 transitions. [2020-04-18 15:55:37,475 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 112 transitions. Word has length 30 [2020-04-18 15:55:37,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:37,475 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 112 transitions. [2020-04-18 15:55:37,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-18 15:55:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 112 transitions. [2020-04-18 15:55:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 15:55:37,476 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:37,476 INFO L425 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:37,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:37,679 INFO L427 AbstractCegarLoop]: === Iteration 26 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:37,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:37,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1057247462, now seen corresponding path program 47 times [2020-04-18 15:55:37,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:37,680 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1856374747] [2020-04-18 15:55:37,682 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:37,683 INFO L259 McrAutomatonBuilder]: Finished intersection with 110 states and 187 transitions. [2020-04-18 15:55:37,683 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2020-04-18 15:55:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 15:55:37,684 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:37,684 INFO L82 PathProgramCache]: Analyzing trace with hash 409828548, now seen corresponding path program 48 times [2020-04-18 15:55:37,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:37,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356093754] [2020-04-18 15:55:37,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:38,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356093754] [2020-04-18 15:55:38,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928630701] [2020-04-18 15:55:38,024 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 15:55:38,070 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:55:38,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:38,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:38,071 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-04-18 15:55:38,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:38,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [26] total 28 [2020-04-18 15:55:38,085 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:38,087 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:38,090 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2020-04-18 15:55:38,090 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:38,370 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:38,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 15:55:38,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-04-18 15:55:38,371 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 28 states. [2020-04-18 15:55:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:39,044 INFO L93 Difference]: Finished difference Result 110 states and 187 transitions. [2020-04-18 15:55:39,044 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 187 transitions. [2020-04-18 15:55:39,045 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:39,045 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1856374747] [2020-04-18 15:55:39,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:39,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:39,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1856374747] [2020-04-18 15:55:39,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 15:55:39,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:39,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 15:55:39,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 15:55:39,047 INFO L87 Difference]: Start difference. First operand 58 states and 112 transitions. Second operand 28 states. [2020-04-18 15:55:39,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:39,205 INFO L93 Difference]: Finished difference Result 60 states and 116 transitions. [2020-04-18 15:55:39,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-18 15:55:39,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-04-18 15:55:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:39,207 INFO L225 Difference]: With dead ends: 60 [2020-04-18 15:55:39,207 INFO L226 Difference]: Without dead ends: 60 [2020-04-18 15:55:39,208 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 15:55:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-18 15:55:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-04-18 15:55:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-18 15:55:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 116 transitions. [2020-04-18 15:55:39,210 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 116 transitions. Word has length 31 [2020-04-18 15:55:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:39,211 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 116 transitions. [2020-04-18 15:55:39,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 15:55:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 116 transitions. [2020-04-18 15:55:39,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 15:55:39,211 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:39,212 INFO L425 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:39,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:39,414 INFO L427 AbstractCegarLoop]: === Iteration 27 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:39,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1585519050, now seen corresponding path program 49 times [2020-04-18 15:55:39,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:39,416 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [917671278] [2020-04-18 15:55:39,417 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:39,418 INFO L259 McrAutomatonBuilder]: Finished intersection with 114 states and 194 transitions. [2020-04-18 15:55:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states. [2020-04-18 15:55:39,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 15:55:39,419 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:39,420 INFO L82 PathProgramCache]: Analyzing trace with hash -180216246, now seen corresponding path program 50 times [2020-04-18 15:55:39,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:39,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174658082] [2020-04-18 15:55:39,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:39,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174658082] [2020-04-18 15:55:39,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028980423] [2020-04-18 15:55:39,739 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:39,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:39,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:39,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:39,780 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-04-18 15:55:39,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:39,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [27] total 29 [2020-04-18 15:55:39,794 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:39,796 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:39,798 INFO L259 McrAutomatonBuilder]: Finished intersection with 36 states and 38 transitions. [2020-04-18 15:55:39,798 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:40,083 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:40,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-04-18 15:55:40,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-04-18 15:55:40,084 INFO L87 Difference]: Start difference. First operand 114 states. Second operand 29 states. [2020-04-18 15:55:40,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:40,800 INFO L93 Difference]: Finished difference Result 114 states and 194 transitions. [2020-04-18 15:55:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 194 transitions. [2020-04-18 15:55:40,801 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:40,801 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [917671278] [2020-04-18 15:55:40,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:40,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:40,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [917671278] [2020-04-18 15:55:40,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-04-18 15:55:40,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:40,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-04-18 15:55:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-04-18 15:55:40,803 INFO L87 Difference]: Start difference. First operand 60 states and 116 transitions. Second operand 29 states. [2020-04-18 15:55:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:40,990 INFO L93 Difference]: Finished difference Result 62 states and 120 transitions. [2020-04-18 15:55:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-18 15:55:40,990 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-04-18 15:55:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:40,991 INFO L225 Difference]: With dead ends: 62 [2020-04-18 15:55:40,991 INFO L226 Difference]: Without dead ends: 62 [2020-04-18 15:55:40,992 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-04-18 15:55:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-18 15:55:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-04-18 15:55:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-18 15:55:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 120 transitions. [2020-04-18 15:55:40,994 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 120 transitions. Word has length 32 [2020-04-18 15:55:40,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:40,995 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 120 transitions. [2020-04-18 15:55:40,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-04-18 15:55:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 120 transitions. [2020-04-18 15:55:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 15:55:40,995 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:40,995 INFO L425 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:41,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:41,200 INFO L427 AbstractCegarLoop]: === Iteration 28 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:41,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:41,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1906902298, now seen corresponding path program 51 times [2020-04-18 15:55:41,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:41,201 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1626003644] [2020-04-18 15:55:41,202 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:41,203 INFO L259 McrAutomatonBuilder]: Finished intersection with 118 states and 201 transitions. [2020-04-18 15:55:41,204 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states. [2020-04-18 15:55:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 15:55:41,204 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:41,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1291735676, now seen corresponding path program 52 times [2020-04-18 15:55:41,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:41,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320204010] [2020-04-18 15:55:41,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:41,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320204010] [2020-04-18 15:55:41,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112959978] [2020-04-18 15:55:41,526 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 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 15:55:41,581 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:55:41,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:41,582 INFO L264 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 28 conjunts are in the unsatisfiable core [2020-04-18 15:55:41,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:41,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:55:41,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-04-18 15:55:41,598 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:41,600 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:41,603 INFO L259 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2020-04-18 15:55:41,603 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:41,893 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:41,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-18 15:55:41,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-04-18 15:55:41,894 INFO L87 Difference]: Start difference. First operand 118 states. Second operand 30 states. [2020-04-18 15:55:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:42,279 INFO L93 Difference]: Finished difference Result 118 states and 201 transitions. [2020-04-18 15:55:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 201 transitions. [2020-04-18 15:55:42,280 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:42,280 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1626003644] [2020-04-18 15:55:42,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:42,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-04-18 15:55:42,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1626003644] [2020-04-18 15:55:42,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-04-18 15:55:42,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:42,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-18 15:55:42,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-04-18 15:55:42,282 INFO L87 Difference]: Start difference. First operand 62 states and 120 transitions. Second operand 30 states. [2020-04-18 15:55:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:42,368 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2020-04-18 15:55:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-18 15:55:42,368 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-04-18 15:55:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:42,369 INFO L225 Difference]: With dead ends: 64 [2020-04-18 15:55:42,369 INFO L226 Difference]: Without dead ends: 64 [2020-04-18 15:55:42,370 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-04-18 15:55:42,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-04-18 15:55:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-04-18 15:55:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-18 15:55:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 124 transitions. [2020-04-18 15:55:42,372 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 124 transitions. Word has length 33 [2020-04-18 15:55:42,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:42,372 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 124 transitions. [2020-04-18 15:55:42,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-04-18 15:55:42,373 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 124 transitions. [2020-04-18 15:55:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-04-18 15:55:42,374 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:42,374 INFO L425 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:42,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:42,577 INFO L427 AbstractCegarLoop]: === Iteration 29 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:42,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1015118902, now seen corresponding path program 53 times [2020-04-18 15:55:42,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:42,578 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [937823876] [2020-04-18 15:55:42,580 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:42,581 INFO L259 McrAutomatonBuilder]: Finished intersection with 122 states and 208 transitions. [2020-04-18 15:55:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states. [2020-04-18 15:55:42,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-04-18 15:55:42,582 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:42,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:42,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1389099638, now seen corresponding path program 54 times [2020-04-18 15:55:42,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:42,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590528000] [2020-04-18 15:55:42,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:42,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590528000] [2020-04-18 15:55:42,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54684925] [2020-04-18 15:55:42,962 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:43,004 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:55:43,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:43,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:43,006 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-04-18 15:55:43,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:43,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [29] total 31 [2020-04-18 15:55:43,021 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:43,023 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:43,025 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 40 transitions. [2020-04-18 15:55:43,025 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:43,363 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:43,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 15:55:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-04-18 15:55:43,364 INFO L87 Difference]: Start difference. First operand 122 states. Second operand 31 states. [2020-04-18 15:55:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:44,154 INFO L93 Difference]: Finished difference Result 122 states and 208 transitions. [2020-04-18 15:55:44,154 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 208 transitions. [2020-04-18 15:55:44,155 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:44,155 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [937823876] [2020-04-18 15:55:44,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:44,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:44,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [937823876] [2020-04-18 15:55:44,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-04-18 15:55:44,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:44,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 15:55:44,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 15:55:44,157 INFO L87 Difference]: Start difference. First operand 64 states and 124 transitions. Second operand 31 states. [2020-04-18 15:55:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:44,332 INFO L93 Difference]: Finished difference Result 66 states and 128 transitions. [2020-04-18 15:55:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-18 15:55:44,332 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-04-18 15:55:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:44,333 INFO L225 Difference]: With dead ends: 66 [2020-04-18 15:55:44,333 INFO L226 Difference]: Without dead ends: 66 [2020-04-18 15:55:44,335 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 15:55:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-18 15:55:44,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-04-18 15:55:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-18 15:55:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 128 transitions. [2020-04-18 15:55:44,338 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 128 transitions. Word has length 34 [2020-04-18 15:55:44,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:44,338 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 128 transitions. [2020-04-18 15:55:44,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-04-18 15:55:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 128 transitions. [2020-04-18 15:55:44,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 15:55:44,339 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:44,339 INFO L425 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:44,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:44,541 INFO L427 AbstractCegarLoop]: === Iteration 30 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1403462886, now seen corresponding path program 55 times [2020-04-18 15:55:44,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:44,542 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [970126286] [2020-04-18 15:55:44,543 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:44,545 INFO L259 McrAutomatonBuilder]: Finished intersection with 126 states and 215 transitions. [2020-04-18 15:55:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states. [2020-04-18 15:55:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 15:55:44,546 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:44,547 INFO L82 PathProgramCache]: Analyzing trace with hash -112415164, now seen corresponding path program 56 times [2020-04-18 15:55:44,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:44,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139743996] [2020-04-18 15:55:44,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:44,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139743996] [2020-04-18 15:55:44,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217883097] [2020-04-18 15:55:44,892 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 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 15:55:44,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:44,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:44,933 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:44,934 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-04-18 15:55:44,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:44,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [30] total 32 [2020-04-18 15:55:44,949 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:44,952 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:44,955 INFO L259 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2020-04-18 15:55:44,955 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:45,332 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:45,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-04-18 15:55:45,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-04-18 15:55:45,333 INFO L87 Difference]: Start difference. First operand 126 states. Second operand 32 states. [2020-04-18 15:55:46,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:46,236 INFO L93 Difference]: Finished difference Result 126 states and 215 transitions. [2020-04-18 15:55:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 215 transitions. [2020-04-18 15:55:46,237 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:46,237 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [970126286] [2020-04-18 15:55:46,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:46,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:46,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [970126286] [2020-04-18 15:55:46,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-04-18 15:55:46,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:46,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-04-18 15:55:46,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-04-18 15:55:46,239 INFO L87 Difference]: Start difference. First operand 66 states and 128 transitions. Second operand 32 states. [2020-04-18 15:55:46,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:46,420 INFO L93 Difference]: Finished difference Result 68 states and 132 transitions. [2020-04-18 15:55:46,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-18 15:55:46,420 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-04-18 15:55:46,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:46,421 INFO L225 Difference]: With dead ends: 68 [2020-04-18 15:55:46,421 INFO L226 Difference]: Without dead ends: 68 [2020-04-18 15:55:46,422 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-04-18 15:55:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-18 15:55:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-04-18 15:55:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-18 15:55:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2020-04-18 15:55:46,425 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 35 [2020-04-18 15:55:46,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:46,425 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2020-04-18 15:55:46,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-04-18 15:55:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2020-04-18 15:55:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-18 15:55:46,426 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:46,426 INFO L425 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:46,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:46,630 INFO L427 AbstractCegarLoop]: === Iteration 31 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:46,630 INFO L82 PathProgramCache]: Analyzing trace with hash -557224502, now seen corresponding path program 57 times [2020-04-18 15:55:46,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:46,631 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1321586139] [2020-04-18 15:55:46,632 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:46,634 INFO L259 McrAutomatonBuilder]: Finished intersection with 130 states and 222 transitions. [2020-04-18 15:55:46,634 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2020-04-18 15:55:46,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-18 15:55:46,635 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:46,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:46,635 INFO L82 PathProgramCache]: Analyzing trace with hash 810097866, now seen corresponding path program 58 times [2020-04-18 15:55:46,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:46,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124428527] [2020-04-18 15:55:46,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:46,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124428527] [2020-04-18 15:55:46,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022017379] [2020-04-18 15:55:46,997 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:47,051 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:55:47,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:47,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 31 conjunts are in the unsatisfiable core [2020-04-18 15:55:47,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:47,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:55:47,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-04-18 15:55:47,084 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:47,087 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:47,090 INFO L259 McrAutomatonBuilder]: Finished intersection with 40 states and 42 transitions. [2020-04-18 15:55:47,090 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:47,448 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:47,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 15:55:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 15:55:47,449 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 33 states. [2020-04-18 15:55:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:47,903 INFO L93 Difference]: Finished difference Result 130 states and 222 transitions. [2020-04-18 15:55:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 222 transitions. [2020-04-18 15:55:47,903 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:47,904 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1321586139] [2020-04-18 15:55:47,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:47,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-04-18 15:55:47,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1321586139] [2020-04-18 15:55:47,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-04-18 15:55:47,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 15:55:47,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 15:55:47,906 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand 33 states. [2020-04-18 15:55:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:47,994 INFO L93 Difference]: Finished difference Result 70 states and 136 transitions. [2020-04-18 15:55:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-18 15:55:47,995 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-04-18 15:55:47,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:47,996 INFO L225 Difference]: With dead ends: 70 [2020-04-18 15:55:47,996 INFO L226 Difference]: Without dead ends: 70 [2020-04-18 15:55:47,996 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 15:55:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-18 15:55:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-04-18 15:55:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-18 15:55:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-04-18 15:55:47,999 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 36 [2020-04-18 15:55:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:47,999 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-04-18 15:55:47,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-04-18 15:55:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-04-18 15:55:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 15:55:48,000 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:48,000 INFO L425 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:48,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:48,203 INFO L427 AbstractCegarLoop]: === Iteration 32 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:48,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:48,203 INFO L82 PathProgramCache]: Analyzing trace with hash -93638374, now seen corresponding path program 59 times [2020-04-18 15:55:48,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:48,204 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [371873824] [2020-04-18 15:55:48,205 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:48,208 INFO L259 McrAutomatonBuilder]: Finished intersection with 134 states and 229 transitions. [2020-04-18 15:55:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states. [2020-04-18 15:55:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 15:55:48,209 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:48,209 INFO L82 PathProgramCache]: Analyzing trace with hash -656769276, now seen corresponding path program 60 times [2020-04-18 15:55:48,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:48,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031383680] [2020-04-18 15:55:48,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:48,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031383680] [2020-04-18 15:55:48,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824295563] [2020-04-18 15:55:48,647 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 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 15:55:48,689 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:55:48,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:48,690 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:48,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-04-18 15:55:48,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:48,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [32] total 34 [2020-04-18 15:55:48,720 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:48,723 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:48,726 INFO L259 McrAutomatonBuilder]: Finished intersection with 41 states and 43 transitions. [2020-04-18 15:55:48,726 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:49,130 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:49,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-18 15:55:49,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 15:55:49,131 INFO L87 Difference]: Start difference. First operand 134 states. Second operand 34 states. [2020-04-18 15:55:50,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:50,086 INFO L93 Difference]: Finished difference Result 134 states and 229 transitions. [2020-04-18 15:55:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 229 transitions. [2020-04-18 15:55:50,087 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:50,087 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [371873824] [2020-04-18 15:55:50,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:50,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:50,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [371873824] [2020-04-18 15:55:50,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-04-18 15:55:50,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:50,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-18 15:55:50,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 15:55:50,090 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 34 states. [2020-04-18 15:55:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:50,293 INFO L93 Difference]: Finished difference Result 72 states and 140 transitions. [2020-04-18 15:55:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-18 15:55:50,294 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-04-18 15:55:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:50,295 INFO L225 Difference]: With dead ends: 72 [2020-04-18 15:55:50,295 INFO L226 Difference]: Without dead ends: 72 [2020-04-18 15:55:50,295 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 15:55:50,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-18 15:55:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-04-18 15:55:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-18 15:55:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 140 transitions. [2020-04-18 15:55:50,298 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 140 transitions. Word has length 37 [2020-04-18 15:55:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:50,299 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 140 transitions. [2020-04-18 15:55:50,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-04-18 15:55:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 140 transitions. [2020-04-18 15:55:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-18 15:55:50,299 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:50,299 INFO L425 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:50,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:50,502 INFO L427 AbstractCegarLoop]: === Iteration 33 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:50,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:50,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1392629706, now seen corresponding path program 61 times [2020-04-18 15:55:50,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:50,503 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [378057871] [2020-04-18 15:55:50,504 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:50,506 INFO L259 McrAutomatonBuilder]: Finished intersection with 138 states and 236 transitions. [2020-04-18 15:55:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-04-18 15:55:50,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-18 15:55:50,507 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:50,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:50,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1114989578, now seen corresponding path program 62 times [2020-04-18 15:55:50,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:50,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056396936] [2020-04-18 15:55:50,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:50,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056396936] [2020-04-18 15:55:50,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10578380] [2020-04-18 15:55:50,943 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 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 15:55:50,982 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:50,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:50,983 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:50,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-04-18 15:55:50,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:50,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [33] total 35 [2020-04-18 15:55:50,999 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:51,002 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:51,005 INFO L259 McrAutomatonBuilder]: Finished intersection with 42 states and 44 transitions. [2020-04-18 15:55:51,005 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:51,449 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:51,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-04-18 15:55:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 15:55:51,450 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 35 states. [2020-04-18 15:55:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:52,467 INFO L93 Difference]: Finished difference Result 138 states and 236 transitions. [2020-04-18 15:55:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 236 transitions. [2020-04-18 15:55:52,467 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:52,468 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [378057871] [2020-04-18 15:55:52,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:52,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:52,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [378057871] [2020-04-18 15:55:52,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-04-18 15:55:52,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:52,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-04-18 15:55:52,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 15:55:52,470 INFO L87 Difference]: Start difference. First operand 72 states and 140 transitions. Second operand 35 states. [2020-04-18 15:55:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:52,651 INFO L93 Difference]: Finished difference Result 74 states and 144 transitions. [2020-04-18 15:55:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-18 15:55:52,651 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-04-18 15:55:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:52,652 INFO L225 Difference]: With dead ends: 74 [2020-04-18 15:55:52,653 INFO L226 Difference]: Without dead ends: 74 [2020-04-18 15:55:52,653 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 15:55:52,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-18 15:55:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-04-18 15:55:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-18 15:55:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 144 transitions. [2020-04-18 15:55:52,656 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 144 transitions. Word has length 38 [2020-04-18 15:55:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:52,656 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 144 transitions. [2020-04-18 15:55:52,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-04-18 15:55:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 144 transitions. [2020-04-18 15:55:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-04-18 15:55:52,656 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:52,657 INFO L425 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:52,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:52,857 INFO L427 AbstractCegarLoop]: === Iteration 34 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:52,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:52,858 INFO L82 PathProgramCache]: Analyzing trace with hash 222299930, now seen corresponding path program 63 times [2020-04-18 15:55:52,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:52,859 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2028453329] [2020-04-18 15:55:52,860 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:52,861 INFO L259 McrAutomatonBuilder]: Finished intersection with 142 states and 243 transitions. [2020-04-18 15:55:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2020-04-18 15:55:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-04-18 15:55:52,862 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:52,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:52,863 INFO L82 PathProgramCache]: Analyzing trace with hash 204939204, now seen corresponding path program 64 times [2020-04-18 15:55:52,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:52,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943238590] [2020-04-18 15:55:52,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:53,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943238590] [2020-04-18 15:55:53,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724056771] [2020-04-18 15:55:53,320 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:55:53,381 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:55:53,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:53,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 34 conjunts are in the unsatisfiable core [2020-04-18 15:55:53,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:53,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:55:53,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-04-18 15:55:53,399 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:53,402 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:53,405 INFO L259 McrAutomatonBuilder]: Finished intersection with 43 states and 45 transitions. [2020-04-18 15:55:53,405 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:53,827 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:55:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-04-18 15:55:53,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 15:55:53,828 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 36 states. [2020-04-18 15:55:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:54,360 INFO L93 Difference]: Finished difference Result 142 states and 243 transitions. [2020-04-18 15:55:54,360 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 243 transitions. [2020-04-18 15:55:54,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:54,361 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2028453329] [2020-04-18 15:55:54,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:54,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-04-18 15:55:54,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2028453329] [2020-04-18 15:55:54,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-04-18 15:55:54,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:54,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-04-18 15:55:54,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 15:55:54,362 INFO L87 Difference]: Start difference. First operand 74 states and 144 transitions. Second operand 36 states. [2020-04-18 15:55:54,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:54,438 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-04-18 15:55:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-18 15:55:54,443 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-04-18 15:55:54,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:54,444 INFO L225 Difference]: With dead ends: 76 [2020-04-18 15:55:54,444 INFO L226 Difference]: Without dead ends: 76 [2020-04-18 15:55:54,444 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 15:55:54,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-04-18 15:55:54,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-04-18 15:55:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-18 15:55:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 148 transitions. [2020-04-18 15:55:54,446 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 148 transitions. Word has length 39 [2020-04-18 15:55:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:54,446 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 148 transitions. [2020-04-18 15:55:54,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-04-18 15:55:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 148 transitions. [2020-04-18 15:55:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-04-18 15:55:54,447 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:54,447 INFO L425 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:54,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:54,648 INFO L427 AbstractCegarLoop]: === Iteration 35 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:54,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:54,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1698184758, now seen corresponding path program 65 times [2020-04-18 15:55:54,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:54,649 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1196105928] [2020-04-18 15:55:54,650 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:54,652 INFO L259 McrAutomatonBuilder]: Finished intersection with 146 states and 250 transitions. [2020-04-18 15:55:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states. [2020-04-18 15:55:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-04-18 15:55:54,653 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:54,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2058148682, now seen corresponding path program 66 times [2020-04-18 15:55:54,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:54,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079387376] [2020-04-18 15:55:54,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:55,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079387376] [2020-04-18 15:55:55,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402753581] [2020-04-18 15:55:55,249 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:55:55,291 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:55:55,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:55,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:55,293 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-04-18 15:55:55,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:55,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [35] total 37 [2020-04-18 15:55:55,310 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:55,312 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:55,315 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 46 transitions. [2020-04-18 15:55:55,315 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:55,778 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 15:55:55,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 15:55:55,779 INFO L87 Difference]: Start difference. First operand 146 states. Second operand 37 states. [2020-04-18 15:55:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:56,892 INFO L93 Difference]: Finished difference Result 146 states and 250 transitions. [2020-04-18 15:55:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 250 transitions. [2020-04-18 15:55:56,892 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:56,893 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1196105928] [2020-04-18 15:55:56,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:56,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:56,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1196105928] [2020-04-18 15:55:56,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-04-18 15:55:56,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:56,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 15:55:56,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-04-18 15:55:56,894 INFO L87 Difference]: Start difference. First operand 76 states and 148 transitions. Second operand 37 states. [2020-04-18 15:55:57,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:57,128 INFO L93 Difference]: Finished difference Result 78 states and 152 transitions. [2020-04-18 15:55:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-18 15:55:57,128 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-04-18 15:55:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:57,129 INFO L225 Difference]: With dead ends: 78 [2020-04-18 15:55:57,129 INFO L226 Difference]: Without dead ends: 78 [2020-04-18 15:55:57,130 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-04-18 15:55:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-18 15:55:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-04-18 15:55:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-18 15:55:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 152 transitions. [2020-04-18 15:55:57,133 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 152 transitions. Word has length 40 [2020-04-18 15:55:57,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:57,134 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 152 transitions. [2020-04-18 15:55:57,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-04-18 15:55:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 152 transitions. [2020-04-18 15:55:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-18 15:55:57,134 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:57,134 INFO L425 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:55:57,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:55:57,340 INFO L427 AbstractCegarLoop]: === Iteration 36 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:55:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:57,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1103667942, now seen corresponding path program 67 times [2020-04-18 15:55:57,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:55:57,341 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1729224654] [2020-04-18 15:55:57,342 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:57,345 INFO L259 McrAutomatonBuilder]: Finished intersection with 150 states and 257 transitions. [2020-04-18 15:55:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states. [2020-04-18 15:55:57,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-18 15:55:57,346 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:55:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:55:57,346 INFO L82 PathProgramCache]: Analyzing trace with hash -621899644, now seen corresponding path program 68 times [2020-04-18 15:55:57,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:55:57,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160065551] [2020-04-18 15:55:57,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:55:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:55:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:55:57,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160065551] [2020-04-18 15:55:57,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011030078] [2020-04-18 15:55:57,902 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 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 15:55:57,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:55:57,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:55:57,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:55:57,952 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:55:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-04-18 15:55:57,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:57,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [36] total 38 [2020-04-18 15:55:57,970 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:55:57,972 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:55:57,975 INFO L259 McrAutomatonBuilder]: Finished intersection with 45 states and 47 transitions. [2020-04-18 15:55:57,975 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:55:58,489 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:55:58,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-04-18 15:55:58,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 15:55:58,490 INFO L87 Difference]: Start difference. First operand 150 states. Second operand 38 states. [2020-04-18 15:55:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:59,650 INFO L93 Difference]: Finished difference Result 150 states and 257 transitions. [2020-04-18 15:55:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 257 transitions. [2020-04-18 15:55:59,651 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:55:59,651 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1729224654] [2020-04-18 15:55:59,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:55:59,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:55:59,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1729224654] [2020-04-18 15:55:59,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-04-18 15:55:59,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:55:59,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-04-18 15:55:59,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 15:55:59,654 INFO L87 Difference]: Start difference. First operand 78 states and 152 transitions. Second operand 38 states. [2020-04-18 15:55:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:55:59,838 INFO L93 Difference]: Finished difference Result 80 states and 156 transitions. [2020-04-18 15:55:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-18 15:55:59,838 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-04-18 15:55:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:55:59,839 INFO L225 Difference]: With dead ends: 80 [2020-04-18 15:55:59,839 INFO L226 Difference]: Without dead ends: 80 [2020-04-18 15:55:59,840 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 15:55:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-18 15:55:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-04-18 15:55:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-18 15:55:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 156 transitions. [2020-04-18 15:55:59,843 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 156 transitions. Word has length 41 [2020-04-18 15:55:59,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:55:59,843 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 156 transitions. [2020-04-18 15:55:59,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-04-18 15:55:59,843 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 156 transitions. [2020-04-18 15:55:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 15:55:59,844 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:55:59,844 INFO L425 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:56:00,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:00,044 INFO L427 AbstractCegarLoop]: === Iteration 37 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:56:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:00,045 INFO L82 PathProgramCache]: Analyzing trace with hash 146484170, now seen corresponding path program 69 times [2020-04-18 15:56:00,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:56:00,046 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [879865408] [2020-04-18 15:56:00,047 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:00,048 INFO L259 McrAutomatonBuilder]: Finished intersection with 154 states and 264 transitions. [2020-04-18 15:56:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-04-18 15:56:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 15:56:00,049 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:56:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2099019126, now seen corresponding path program 70 times [2020-04-18 15:56:00,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:56:00,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857354144] [2020-04-18 15:56:00,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:56:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:56:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:00,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857354144] [2020-04-18 15:56:00,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238864959] [2020-04-18 15:56:00,585 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:00,654 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:56:00,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:56:00,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 37 conjunts are in the unsatisfiable core [2020-04-18 15:56:00,656 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:56:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:00,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:56:00,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-04-18 15:56:00,677 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:56:00,681 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:00,686 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 48 transitions. [2020-04-18 15:56:00,686 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:56:01,183 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:56:01,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-04-18 15:56:01,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 15:56:01,184 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 39 states. [2020-04-18 15:56:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:01,773 INFO L93 Difference]: Finished difference Result 154 states and 264 transitions. [2020-04-18 15:56:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 264 transitions. [2020-04-18 15:56:01,774 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:56:01,774 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [879865408] [2020-04-18 15:56:01,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:01,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-04-18 15:56:01,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [879865408] [2020-04-18 15:56:01,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-04-18 15:56:01,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:56:01,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-04-18 15:56:01,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 15:56:01,776 INFO L87 Difference]: Start difference. First operand 80 states and 156 transitions. Second operand 39 states. [2020-04-18 15:56:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:01,894 INFO L93 Difference]: Finished difference Result 82 states and 160 transitions. [2020-04-18 15:56:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-18 15:56:01,895 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-04-18 15:56:01,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:56:01,896 INFO L225 Difference]: With dead ends: 82 [2020-04-18 15:56:01,896 INFO L226 Difference]: Without dead ends: 82 [2020-04-18 15:56:01,896 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 15:56:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-18 15:56:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-04-18 15:56:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-18 15:56:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 160 transitions. [2020-04-18 15:56:01,899 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 160 transitions. Word has length 42 [2020-04-18 15:56:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:56:01,899 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 160 transitions. [2020-04-18 15:56:01,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-04-18 15:56:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 160 transitions. [2020-04-18 15:56:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-04-18 15:56:01,900 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:56:01,900 INFO L425 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:56:02,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:02,103 INFO L427 AbstractCegarLoop]: === Iteration 38 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:56:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:02,104 INFO L82 PathProgramCache]: Analyzing trace with hash 246493978, now seen corresponding path program 71 times [2020-04-18 15:56:02,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:56:02,105 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [643008937] [2020-04-18 15:56:02,107 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:02,108 INFO L259 McrAutomatonBuilder]: Finished intersection with 158 states and 271 transitions. [2020-04-18 15:56:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-04-18 15:56:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-04-18 15:56:02,109 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:56:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:02,110 INFO L82 PathProgramCache]: Analyzing trace with hash -645082812, now seen corresponding path program 72 times [2020-04-18 15:56:02,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:56:02,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117197797] [2020-04-18 15:56:02,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:56:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:56:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:02,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117197797] [2020-04-18 15:56:02,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910227939] [2020-04-18 15:56:02,697 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:02,741 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:56:02,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:56:02,742 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:56:02,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:56:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-04-18 15:56:02,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:02,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [38] total 40 [2020-04-18 15:56:02,761 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:56:02,764 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:02,770 INFO L259 McrAutomatonBuilder]: Finished intersection with 47 states and 49 transitions. [2020-04-18 15:56:02,770 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:56:03,330 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:56:03,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-04-18 15:56:03,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-04-18 15:56:03,331 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 40 states. [2020-04-18 15:56:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:04,640 INFO L93 Difference]: Finished difference Result 158 states and 271 transitions. [2020-04-18 15:56:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 271 transitions. [2020-04-18 15:56:04,640 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:56:04,641 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [643008937] [2020-04-18 15:56:04,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:04,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:56:04,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [643008937] [2020-04-18 15:56:04,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-04-18 15:56:04,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:56:04,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-04-18 15:56:04,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-04-18 15:56:04,642 INFO L87 Difference]: Start difference. First operand 82 states and 160 transitions. Second operand 40 states. [2020-04-18 15:56:04,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:04,877 INFO L93 Difference]: Finished difference Result 84 states and 164 transitions. [2020-04-18 15:56:04,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 15:56:04,878 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-04-18 15:56:04,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:56:04,879 INFO L225 Difference]: With dead ends: 84 [2020-04-18 15:56:04,879 INFO L226 Difference]: Without dead ends: 84 [2020-04-18 15:56:04,880 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-04-18 15:56:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-18 15:56:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-04-18 15:56:04,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-18 15:56:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2020-04-18 15:56:04,882 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 43 [2020-04-18 15:56:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:56:04,882 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2020-04-18 15:56:04,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-04-18 15:56:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2020-04-18 15:56:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-04-18 15:56:04,883 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:56:04,883 INFO L425 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:56:05,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:05,084 INFO L427 AbstractCegarLoop]: === Iteration 39 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:56:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:05,085 INFO L82 PathProgramCache]: Analyzing trace with hash -948169270, now seen corresponding path program 73 times [2020-04-18 15:56:05,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:56:05,085 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1851924516] [2020-04-18 15:56:05,087 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:05,089 INFO L259 McrAutomatonBuilder]: Finished intersection with 162 states and 278 transitions. [2020-04-18 15:56:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states. [2020-04-18 15:56:05,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-04-18 15:56:05,090 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:56:05,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:05,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1477269962, now seen corresponding path program 74 times [2020-04-18 15:56:05,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:56:05,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631298308] [2020-04-18 15:56:05,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:56:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:56:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:05,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631298308] [2020-04-18 15:56:05,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425744767] [2020-04-18 15:56:05,698 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 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 15:56:05,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:56:05,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:56:05,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:56:05,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:56:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-04-18 15:56:05,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:05,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [39] total 41 [2020-04-18 15:56:05,758 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:56:05,762 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:05,766 INFO L259 McrAutomatonBuilder]: Finished intersection with 48 states and 50 transitions. [2020-04-18 15:56:05,766 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:56:06,377 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:56:06,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 15:56:06,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 15:56:06,378 INFO L87 Difference]: Start difference. First operand 162 states. Second operand 41 states. [2020-04-18 15:56:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:07,736 INFO L93 Difference]: Finished difference Result 162 states and 278 transitions. [2020-04-18 15:56:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 278 transitions. [2020-04-18 15:56:07,736 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:56:07,737 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1851924516] [2020-04-18 15:56:07,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:07,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:56:07,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1851924516] [2020-04-18 15:56:07,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-18 15:56:07,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:56:07,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 15:56:07,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-04-18 15:56:07,738 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand 41 states. [2020-04-18 15:56:07,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:07,902 INFO L93 Difference]: Finished difference Result 86 states and 168 transitions. [2020-04-18 15:56:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-18 15:56:07,903 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-04-18 15:56:07,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:56:07,904 INFO L225 Difference]: With dead ends: 86 [2020-04-18 15:56:07,904 INFO L226 Difference]: Without dead ends: 86 [2020-04-18 15:56:07,905 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-04-18 15:56:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-18 15:56:07,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-04-18 15:56:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-18 15:56:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 168 transitions. [2020-04-18 15:56:07,908 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 168 transitions. Word has length 44 [2020-04-18 15:56:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:56:07,908 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 168 transitions. [2020-04-18 15:56:07,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-18 15:56:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 168 transitions. [2020-04-18 15:56:07,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-18 15:56:07,909 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:56:07,909 INFO L425 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:56:08,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:08,112 INFO L427 AbstractCegarLoop]: === Iteration 40 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:56:08,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:08,113 INFO L82 PathProgramCache]: Analyzing trace with hash 671975706, now seen corresponding path program 75 times [2020-04-18 15:56:08,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:56:08,113 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1860513144] [2020-04-18 15:56:08,115 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:08,116 INFO L259 McrAutomatonBuilder]: Finished intersection with 166 states and 285 transitions. [2020-04-18 15:56:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states. [2020-04-18 15:56:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-18 15:56:08,117 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:56:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:08,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1449270780, now seen corresponding path program 76 times [2020-04-18 15:56:08,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:56:08,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405367205] [2020-04-18 15:56:08,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:56:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:56:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:08,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405367205] [2020-04-18 15:56:08,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726190468] [2020-04-18 15:56:08,756 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 15:56:08,819 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:56:08,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:56:08,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 40 conjunts are in the unsatisfiable core [2020-04-18 15:56:08,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:56:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:08,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:56:08,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-04-18 15:56:08,839 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:56:08,842 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:08,846 INFO L259 McrAutomatonBuilder]: Finished intersection with 49 states and 51 transitions. [2020-04-18 15:56:08,846 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:56:09,424 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:56:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-04-18 15:56:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 15:56:09,424 INFO L87 Difference]: Start difference. First operand 166 states. Second operand 42 states. [2020-04-18 15:56:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:10,105 INFO L93 Difference]: Finished difference Result 166 states and 285 transitions. [2020-04-18 15:56:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 285 transitions. [2020-04-18 15:56:10,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:56:10,106 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1860513144] [2020-04-18 15:56:10,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:10,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-04-18 15:56:10,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1860513144] [2020-04-18 15:56:10,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-04-18 15:56:10,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:56:10,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-04-18 15:56:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 15:56:10,107 INFO L87 Difference]: Start difference. First operand 86 states and 168 transitions. Second operand 42 states. [2020-04-18 15:56:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:10,208 INFO L93 Difference]: Finished difference Result 88 states and 172 transitions. [2020-04-18 15:56:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-18 15:56:10,209 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-04-18 15:56:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:56:10,210 INFO L225 Difference]: With dead ends: 88 [2020-04-18 15:56:10,210 INFO L226 Difference]: Without dead ends: 88 [2020-04-18 15:56:10,210 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 15:56:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-18 15:56:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-04-18 15:56:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-18 15:56:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 172 transitions. [2020-04-18 15:56:10,214 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 172 transitions. Word has length 45 [2020-04-18 15:56:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:56:10,214 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 172 transitions. [2020-04-18 15:56:10,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-04-18 15:56:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 172 transitions. [2020-04-18 15:56:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-04-18 15:56:10,215 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:56:10,215 INFO L425 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:56:10,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:10,418 INFO L427 AbstractCegarLoop]: === Iteration 41 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:56:10,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:10,419 INFO L82 PathProgramCache]: Analyzing trace with hash -643137590, now seen corresponding path program 77 times [2020-04-18 15:56:10,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:56:10,420 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [736701879] [2020-04-18 15:56:10,421 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:10,423 INFO L259 McrAutomatonBuilder]: Finished intersection with 170 states and 292 transitions. [2020-04-18 15:56:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-04-18 15:56:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-04-18 15:56:10,425 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:56:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:10,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1977720566, now seen corresponding path program 78 times [2020-04-18 15:56:10,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:56:10,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77491144] [2020-04-18 15:56:10,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:56:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:56:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:11,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77491144] [2020-04-18 15:56:11,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486660517] [2020-04-18 15:56:11,188 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:11,232 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:56:11,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:56:11,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:56:11,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:56:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-18 15:56:11,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:11,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [41] total 43 [2020-04-18 15:56:11,261 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:56:11,263 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:11,268 INFO L259 McrAutomatonBuilder]: Finished intersection with 50 states and 52 transitions. [2020-04-18 15:56:11,268 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:56:11,901 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:56:11,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-18 15:56:11,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 15:56:11,902 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 43 states. [2020-04-18 15:56:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:13,390 INFO L93 Difference]: Finished difference Result 170 states and 292 transitions. [2020-04-18 15:56:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 292 transitions. [2020-04-18 15:56:13,390 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:56:13,391 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [736701879] [2020-04-18 15:56:13,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:13,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:56:13,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [736701879] [2020-04-18 15:56:13,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-04-18 15:56:13,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:56:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-18 15:56:13,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 15:56:13,393 INFO L87 Difference]: Start difference. First operand 88 states and 172 transitions. Second operand 43 states. [2020-04-18 15:56:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:13,653 INFO L93 Difference]: Finished difference Result 90 states and 176 transitions. [2020-04-18 15:56:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-18 15:56:13,654 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-04-18 15:56:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:56:13,655 INFO L225 Difference]: With dead ends: 90 [2020-04-18 15:56:13,655 INFO L226 Difference]: Without dead ends: 90 [2020-04-18 15:56:13,656 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 15:56:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-18 15:56:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-04-18 15:56:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-04-18 15:56:13,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 176 transitions. [2020-04-18 15:56:13,659 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 176 transitions. Word has length 46 [2020-04-18 15:56:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:56:13,659 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 176 transitions. [2020-04-18 15:56:13,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-04-18 15:56:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 176 transitions. [2020-04-18 15:56:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 15:56:13,660 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:56:13,660 INFO L425 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:56:13,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:13,863 INFO L427 AbstractCegarLoop]: === Iteration 42 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:56:13,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:13,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1538023194, now seen corresponding path program 79 times [2020-04-18 15:56:13,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:56:13,865 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [394593401] [2020-04-18 15:56:13,866 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:13,868 INFO L259 McrAutomatonBuilder]: Finished intersection with 174 states and 299 transitions. [2020-04-18 15:56:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2020-04-18 15:56:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 15:56:13,869 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:56:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1179794748, now seen corresponding path program 80 times [2020-04-18 15:56:13,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:56:13,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797112957] [2020-04-18 15:56:13,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:56:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:56:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:14,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797112957] [2020-04-18 15:56:14,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783645885] [2020-04-18 15:56:14,793 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 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 15:56:14,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 15:56:14,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:56:14,837 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:56:14,838 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:56:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2020-04-18 15:56:14,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:14,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [42] total 44 [2020-04-18 15:56:14,858 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:56:14,861 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:14,866 INFO L259 McrAutomatonBuilder]: Finished intersection with 51 states and 53 transitions. [2020-04-18 15:56:14,866 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:56:15,511 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:56:15,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-04-18 15:56:15,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-04-18 15:56:15,512 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 44 states. [2020-04-18 15:56:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:17,082 INFO L93 Difference]: Finished difference Result 174 states and 299 transitions. [2020-04-18 15:56:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 299 transitions. [2020-04-18 15:56:17,082 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:56:17,083 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [394593401] [2020-04-18 15:56:17,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:17,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:56:17,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [394593401] [2020-04-18 15:56:17,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-04-18 15:56:17,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:56:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-04-18 15:56:17,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-04-18 15:56:17,085 INFO L87 Difference]: Start difference. First operand 90 states and 176 transitions. Second operand 44 states. [2020-04-18 15:56:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:17,345 INFO L93 Difference]: Finished difference Result 92 states and 180 transitions. [2020-04-18 15:56:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 15:56:17,345 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-04-18 15:56:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:56:17,346 INFO L225 Difference]: With dead ends: 92 [2020-04-18 15:56:17,346 INFO L226 Difference]: Without dead ends: 92 [2020-04-18 15:56:17,347 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-04-18 15:56:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-18 15:56:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-04-18 15:56:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-18 15:56:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 180 transitions. [2020-04-18 15:56:17,349 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 180 transitions. Word has length 47 [2020-04-18 15:56:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:56:17,349 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 180 transitions. [2020-04-18 15:56:17,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-04-18 15:56:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 180 transitions. [2020-04-18 15:56:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-04-18 15:56:17,350 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:56:17,350 INFO L425 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:56:17,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:17,551 INFO L427 AbstractCegarLoop]: === Iteration 43 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:56:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:17,551 INFO L82 PathProgramCache]: Analyzing trace with hash 434530762, now seen corresponding path program 81 times [2020-04-18 15:56:17,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:56:17,552 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1972270742] [2020-04-18 15:56:17,553 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:17,555 INFO L259 McrAutomatonBuilder]: Finished intersection with 178 states and 306 transitions. [2020-04-18 15:56:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states. [2020-04-18 15:56:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-04-18 15:56:17,557 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:56:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2081069130, now seen corresponding path program 82 times [2020-04-18 15:56:17,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:56:17,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271343922] [2020-04-18 15:56:17,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:56:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:56:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:18,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271343922] [2020-04-18 15:56:18,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472775049] [2020-04-18 15:56:18,257 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:18,324 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 15:56:18,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:56:18,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 43 conjunts are in the unsatisfiable core [2020-04-18 15:56:18,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:56:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:18,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 15:56:18,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-04-18 15:56:18,344 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:56:18,347 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:18,352 INFO L259 McrAutomatonBuilder]: Finished intersection with 52 states and 54 transitions. [2020-04-18 15:56:18,352 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:56:19,050 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:56:19,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-18 15:56:19,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 15:56:19,051 INFO L87 Difference]: Start difference. First operand 178 states. Second operand 45 states. [2020-04-18 15:56:19,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:19,828 INFO L93 Difference]: Finished difference Result 178 states and 306 transitions. [2020-04-18 15:56:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 306 transitions. [2020-04-18 15:56:19,829 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:56:19,829 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1972270742] [2020-04-18 15:56:19,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:19,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-04-18 15:56:19,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1972270742] [2020-04-18 15:56:19,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-04-18 15:56:19,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:56:19,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-18 15:56:19,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 15:56:19,831 INFO L87 Difference]: Start difference. First operand 92 states and 180 transitions. Second operand 45 states. [2020-04-18 15:56:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:19,982 INFO L93 Difference]: Finished difference Result 94 states and 184 transitions. [2020-04-18 15:56:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 15:56:19,982 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-04-18 15:56:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:56:19,983 INFO L225 Difference]: With dead ends: 94 [2020-04-18 15:56:19,983 INFO L226 Difference]: Without dead ends: 94 [2020-04-18 15:56:19,984 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 15:56:19,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-04-18 15:56:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-04-18 15:56:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-18 15:56:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 184 transitions. [2020-04-18 15:56:19,988 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 184 transitions. Word has length 48 [2020-04-18 15:56:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:56:19,988 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 184 transitions. [2020-04-18 15:56:19,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-04-18 15:56:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 184 transitions. [2020-04-18 15:56:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-04-18 15:56:19,988 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:56:19,989 INFO L425 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:56:20,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:20,192 INFO L427 AbstractCegarLoop]: === Iteration 44 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:56:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash 586003738, now seen corresponding path program 83 times [2020-04-18 15:56:20,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:56:20,194 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [187580616] [2020-04-18 15:56:20,195 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:20,197 INFO L259 McrAutomatonBuilder]: Finished intersection with 182 states and 313 transitions. [2020-04-18 15:56:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states. [2020-04-18 15:56:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-04-18 15:56:20,198 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:56:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:20,198 INFO L82 PathProgramCache]: Analyzing trace with hash 88634244, now seen corresponding path program 84 times [2020-04-18 15:56:20,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:56:20,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766665119] [2020-04-18 15:56:20,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:56:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:56:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:20,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766665119] [2020-04-18 15:56:20,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35358625] [2020-04-18 15:56:20,926 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 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 15:56:20,968 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 15:56:20,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:56:20,969 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 15:56:20,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:56:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2020-04-18 15:56:21,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:21,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [44] total 46 [2020-04-18 15:56:21,014 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:56:21,020 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:21,036 INFO L259 McrAutomatonBuilder]: Finished intersection with 53 states and 55 transitions. [2020-04-18 15:56:21,036 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:56:21,749 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:56:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-04-18 15:56:21,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 15:56:21,750 INFO L87 Difference]: Start difference. First operand 182 states. Second operand 46 states. [2020-04-18 15:56:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:23,446 INFO L93 Difference]: Finished difference Result 182 states and 313 transitions. [2020-04-18 15:56:23,446 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 313 transitions. [2020-04-18 15:56:23,447 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:56:23,447 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [187580616] [2020-04-18 15:56:23,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:23,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:56:23,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [187580616] [2020-04-18 15:56:23,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-04-18 15:56:23,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:56:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-04-18 15:56:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-04-18 15:56:23,448 INFO L87 Difference]: Start difference. First operand 94 states and 184 transitions. Second operand 46 states. [2020-04-18 15:56:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:23,640 INFO L93 Difference]: Finished difference Result 96 states and 188 transitions. [2020-04-18 15:56:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-18 15:56:23,640 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2020-04-18 15:56:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:56:23,641 INFO L225 Difference]: With dead ends: 96 [2020-04-18 15:56:23,642 INFO L226 Difference]: Without dead ends: 96 [2020-04-18 15:56:23,642 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-04-18 15:56:23,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-18 15:56:23,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-04-18 15:56:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-18 15:56:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 188 transitions. [2020-04-18 15:56:23,645 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 188 transitions. Word has length 49 [2020-04-18 15:56:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:56:23,645 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 188 transitions. [2020-04-18 15:56:23,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-04-18 15:56:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 188 transitions. [2020-04-18 15:56:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-04-18 15:56:23,646 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:56:23,646 INFO L425 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:56:23,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:56:23,849 INFO L427 AbstractCegarLoop]: === Iteration 45 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:56:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:23,850 INFO L82 PathProgramCache]: Analyzing trace with hash 986698698, now seen corresponding path program 85 times [2020-04-18 15:56:23,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:56:23,850 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1887122967] [2020-04-18 15:56:23,852 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:23,854 INFO L259 McrAutomatonBuilder]: Finished intersection with 186 states and 320 transitions. [2020-04-18 15:56:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2020-04-18 15:56:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-04-18 15:56:23,855 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:56:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:23,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1547305078, now seen corresponding path program 86 times [2020-04-18 15:56:23,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:56:23,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140194743] [2020-04-18 15:56:23,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:56:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:56:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2020-04-18 15:56:23,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140194743] [2020-04-18 15:56:23,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:56:23,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 15:56:23,877 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:56:23,881 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:23,888 INFO L259 McrAutomatonBuilder]: Finished intersection with 54 states and 56 transitions. [2020-04-18 15:56:23,889 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:56:23,891 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:56:23,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 15:56:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 15:56:23,892 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 3 states. [2020-04-18 15:56:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:23,894 INFO L93 Difference]: Finished difference Result 188 states and 321 transitions. [2020-04-18 15:56:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 321 transitions. [2020-04-18 15:56:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-04-18 15:56:23,895 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 15:56:23,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:56:23,895 INFO L82 PathProgramCache]: Analyzing trace with hash 986698698, now seen corresponding path program 87 times [2020-04-18 15:56:23,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:56:23,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478334160] [2020-04-18 15:56:23,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:56:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:56:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 15:56:25,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478334160] [2020-04-18 15:56:25,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375482583] [2020-04-18 15:56:25,309 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 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 15:56:25,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 15:56:25,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 15:56:25,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 15:56:25,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 15:56:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2020-04-18 15:56:25,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:25,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [45] total 46 [2020-04-18 15:56:25,410 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:56:25,415 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:56:25,429 INFO L259 McrAutomatonBuilder]: Finished intersection with 96 states and 140 transitions. [2020-04-18 15:56:25,429 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:56:29,520 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 44 times. [2020-04-18 15:56:29,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-04-18 15:56:29,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=8147, Unknown=0, NotChecked=0, Total=8372 [2020-04-18 15:56:29,521 INFO L87 Difference]: Start difference. First operand 188 states and 321 transitions. Second operand 91 states. [2020-04-18 15:56:30,761 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 18 [2020-04-18 15:56:31,210 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:31,678 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:32,145 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:32,620 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:33,088 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:33,557 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:34,028 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:34,513 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:35,000 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:35,585 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:36,074 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:36,539 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:37,027 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:37,490 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:37,951 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:38,410 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:38,870 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:39,386 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:39,853 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:40,342 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:40,815 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:41,278 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:41,739 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:42,223 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:42,694 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:43,186 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:43,658 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:44,146 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:44,624 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:45,111 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:45,610 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:46,095 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:46,573 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:47,043 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:47,521 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:48,017 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:48,475 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:48,941 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:49,439 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:49,909 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 15:56:50,378 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 18 [2020-04-18 15:56:50,833 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 17 [2020-04-18 15:56:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:56:51,019 INFO L93 Difference]: Finished difference Result 190 states and 322 transitions. [2020-04-18 15:56:51,019 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 322 transitions. [2020-04-18 15:56:51,020 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:56:51,020 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1887122967] [2020-04-18 15:56:51,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:56:51,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 15:56:51,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1887122967] [2020-04-18 15:56:51,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-04-18 15:56:51,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:56:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-04-18 15:56:51,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2727, Invalid=29493, Unknown=0, NotChecked=0, Total=32220 [2020-04-18 15:56:51,022 INFO L87 Difference]: Start difference. First operand 96 states and 188 transitions. Second operand 92 states. [2020-04-18 15:56:52,087 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 20 [2020-04-18 15:56:52,501 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:52,897 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:53,288 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:53,858 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:54,250 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:54,640 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:55,028 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:55,431 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:55,828 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:56,342 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:56,746 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:57,136 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:57,532 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:57,922 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:58,336 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:58,729 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:59,118 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:59,516 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:56:59,906 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:00,310 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:00,714 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:01,133 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:01,529 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:01,921 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:02,319 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:02,725 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:03,123 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:03,526 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:03,919 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:04,332 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:04,730 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:05,124 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:05,530 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:05,934 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:06,355 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:06,756 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:07,188 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:07,598 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:08,006 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:08,402 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 21 [2020-04-18 15:57:08,797 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 20 [2020-04-18 15:57:09,172 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 19 [2020-04-18 15:57:09,708 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 18 [2020-04-18 15:57:09,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:57:09,829 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2020-04-18 15:57:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-04-18 15:57:09,830 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 50 [2020-04-18 15:57:09,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:57:09,830 INFO L225 Difference]: With dead ends: 97 [2020-04-18 15:57:09,830 INFO L226 Difference]: Without dead ends: 0 [2020-04-18 15:57:09,833 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16779 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=5682, Invalid=67488, Unknown=0, NotChecked=0, Total=73170 [2020-04-18 15:57:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-18 15:57:09,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-18 15:57:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-18 15:57:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-18 15:57:09,834 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-04-18 15:57:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:57:09,834 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-18 15:57:09,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-04-18 15:57:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-18 15:57:09,835 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:57:10,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 15:57:10,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 03:57:10 BasicIcfg [2020-04-18 15:57:10,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 15:57:10,041 INFO L168 Benchmark]: Toolchain (without parser) took 116406.90 ms. Allocated memory was 136.3 MB in the beginning and 695.2 MB in the end (delta: 558.9 MB). Free memory was 99.6 MB in the beginning and 129.3 MB in the end (delta: -29.8 MB). Peak memory consumption was 529.1 MB. Max. memory is 7.1 GB. [2020-04-18 15:57:10,042 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 136.3 MB. Free memory is still 119.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-04-18 15:57:10,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 677.32 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 97.6 MB in the beginning and 159.4 MB in the end (delta: -61.9 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-04-18 15:57:10,042 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.59 ms. Allocated memory is still 200.3 MB. Free memory was 159.4 MB in the beginning and 157.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-04-18 15:57:10,042 INFO L168 Benchmark]: Boogie Preprocessor took 30.76 ms. Allocated memory is still 200.3 MB. Free memory was 157.2 MB in the beginning and 155.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-18 15:57:10,043 INFO L168 Benchmark]: RCFGBuilder took 440.32 ms. Allocated memory is still 200.3 MB. Free memory was 155.2 MB in the beginning and 133.8 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2020-04-18 15:57:10,043 INFO L168 Benchmark]: TraceAbstraction took 115186.55 ms. Allocated memory was 200.3 MB in the beginning and 695.2 MB in the end (delta: 494.9 MB). Free memory was 133.8 MB in the beginning and 129.3 MB in the end (delta: 4.5 MB). Peak memory consumption was 499.4 MB. Max. memory is 7.1 GB. [2020-04-18 15:57:10,045 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 136.3 MB. Free memory is still 119.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 677.32 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 97.6 MB in the beginning and 159.4 MB in the end (delta: -61.9 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.59 ms. Allocated memory is still 200.3 MB. Free memory was 159.4 MB in the beginning and 157.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.76 ms. Allocated memory is still 200.3 MB. Free memory was 157.2 MB in the beginning and 155.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 440.32 ms. Allocated memory is still 200.3 MB. Free memory was 155.2 MB in the beginning and 133.8 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 115186.55 ms. Allocated memory was 200.3 MB in the beginning and 695.2 MB in the end (delta: 494.9 MB). Free memory was 133.8 MB in the beginning and 129.3 MB in the end (delta: 4.5 MB). Peak memory consumption was 499.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.7s, 58 ProgramPointsBefore, 15 ProgramPointsAfterwards, 59 TransitionsBefore, 13 TransitionsAfterwards, 352 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 192 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 354 CheckedPairsTotal, 47 TotalNumberOfCompositions - PositiveResult [Line: 695]: 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 2 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 115.1s, OverallIterations: 45, TraceHistogramMax: 43, AutomataDifference: 23.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 435 SDtfs, 2418 SDslu, 6640 SDs, 0 SdLazy, 10480 SolverSat, 1124 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5335 GetRequests, 3444 SyntacticMatches, 2 SemanticMatches, 1889 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26187 ImplicationChecksByTransitivity, 52.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 45 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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...