/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 18:41:44,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 18:41:44,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 18:41:44,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 18:41:44,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 18:41:44,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 18:41:44,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 18:41:44,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 18:41:44,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 18:41:44,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 18:41:44,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 18:41:44,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 18:41:44,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 18:41:44,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 18:41:44,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 18:41:44,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 18:41:44,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 18:41:44,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 18:41:44,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 18:41:44,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 18:41:44,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 18:41:44,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 18:41:44,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 18:41:44,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 18:41:44,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 18:41:44,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 18:41:44,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 18:41:44,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 18:41:44,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 18:41:44,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 18:41:44,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 18:41:44,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 18:41:44,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 18:41:44,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 18:41:44,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 18:41:44,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 18:41:44,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 18:41:44,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 18:41:44,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 18:41:44,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 18:41:44,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 18:41:44,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-04-17 18:41:44,376 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 18:41:44,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 18:41:44,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 18:41:44,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 18:41:44,378 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 18:41:44,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 18:41:44,378 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 18:41:44,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 18:41:44,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 18:41:44,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 18:41:44,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 18:41:44,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 18:41:44,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 18:41:44,380 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 18:41:44,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 18:41:44,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 18:41:44,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 18:41:44,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 18:41:44,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 18:41:44,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 18:41:44,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 18:41:44,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:41:44,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 18:41:44,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 18:41:44,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 18:41:44,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 18:41:44,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 18:41:44,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 18:41:44,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 18:41:44,691 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 18:41:44,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 18:41:44,715 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 18:41:44,716 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 18:41:44,717 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 18:41:44,717 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-04-17 18:41:44,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d16a5446/5c85e532b2be4fa6bec0fa41ec5645ff/FLAG46da985d6 [2020-04-17 18:41:45,363 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 18:41:45,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-04-17 18:41:45,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d16a5446/5c85e532b2be4fa6bec0fa41ec5645ff/FLAG46da985d6 [2020-04-17 18:41:45,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d16a5446/5c85e532b2be4fa6bec0fa41ec5645ff [2020-04-17 18:41:45,656 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 18:41:45,679 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 18:41:45,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 18:41:45,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 18:41:45,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 18:41:45,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:41:45" (1/1) ... [2020-04-17 18:41:45,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bdb2cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:45, skipping insertion in model container [2020-04-17 18:41:45,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:41:45" (1/1) ... [2020-04-17 18:41:45,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 18:41:45,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 18:41:46,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:41:46,214 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 18:41:46,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:41:46,337 INFO L208 MainTranslator]: Completed translation [2020-04-17 18:41:46,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46 WrapperNode [2020-04-17 18:41:46,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 18:41:46,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 18:41:46,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 18:41:46,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 18:41:46,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 18:41:46,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 18:41:46,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 18:41:46,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 18:41:46,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 18:41:46,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 18:41:46,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 18:41:46,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 18:41:46,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (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 [2020-04-17 18:41:46,466 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 18:41:46,467 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 18:41:46,467 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 18:41:46,467 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 18:41:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 18:41:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 18:41:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 18:41:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 18:41:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 18:41:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 18:41:46,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 18:41:46,471 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 18:41:46,835 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 18:41:46,835 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 18:41:46,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:41:46 BoogieIcfgContainer [2020-04-17 18:41:46,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 18:41:46,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 18:41:46,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 18:41:46,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 18:41:46,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:41:45" (1/3) ... [2020-04-17 18:41:46,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8047e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:41:46, skipping insertion in model container [2020-04-17 18:41:46,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (2/3) ... [2020-04-17 18:41:46,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8047e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:41:46, skipping insertion in model container [2020-04-17 18:41:46,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:41:46" (3/3) ... [2020-04-17 18:41:46,847 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-04-17 18:41:46,859 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 18:41:46,859 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 18:41:46,867 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 18:41:46,868 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 18:41:46,898 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,898 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,899 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,899 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,900 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,900 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,900 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,900 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,901 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,901 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,901 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,902 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,902 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,902 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,903 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,903 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,903 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,903 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,904 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,904 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,904 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,905 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,905 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,906 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,906 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,906 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,906 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,907 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,907 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,907 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,911 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,911 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,911 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,912 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,912 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,912 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,917 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,918 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,918 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,919 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,919 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,919 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:46,934 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 18:41:46,950 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:41:46,951 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:41:46,951 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:41:46,951 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:41:46,951 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:41:46,951 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:41:46,951 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:41:46,951 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:41:46,966 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:46,968 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:47,009 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 18:41:47,009 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:41:47,015 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 18:41:47,018 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:47,039 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 18:41:47,039 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:41:47,040 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 18:41:47,042 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-17 18:41:47,043 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:41:48,199 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-17 18:41:48,300 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-17 18:41:48,301 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-17 18:41:48,305 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-17 18:41:48,318 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 18:41:48,320 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 18:41:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 18:41:48,328 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:48,329 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 18:41:48,329 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:48,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:48,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-17 18:41:48,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:48,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336128612] [2020-04-17 18:41:48,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:48,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336128612] [2020-04-17 18:41:48,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:48,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:41:48,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660549591] [2020-04-17 18:41:48,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:41:48,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:48,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:41:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:41:48,698 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 18:41:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:48,818 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-17 18:41:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:41:48,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 18:41:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:48,833 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:41:48,833 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:41:48,834 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:41:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-17 18:41:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:41:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-17 18:41:48,885 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-17 18:41:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:48,885 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-17 18:41:48,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:41:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-17 18:41:48,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:48,892 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:48,893 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:48,893 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-17 18:41:48,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:48,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014265178] [2020-04-17 18:41:48,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014265178] [2020-04-17 18:41:49,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827918408] [2020-04-17 18:41:49,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,019 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-04-17 18:41:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,093 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-17 18:41:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:49,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,096 INFO L225 Difference]: With dead ends: 80 [2020-04-17 18:41:49,096 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 18:41:49,097 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 18:41:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-17 18:41:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 18:41:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-17 18:41:49,107 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-17 18:41:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,108 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-17 18:41:49,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-17 18:41:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:49,109 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,109 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,109 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,110 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-17 18:41:49,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091662374] [2020-04-17 18:41:49,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091662374] [2020-04-17 18:41:49,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836719063] [2020-04-17 18:41:49,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,193 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-04-17 18:41:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,219 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-04-17 18:41:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:41:49,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,221 INFO L225 Difference]: With dead ends: 73 [2020-04-17 18:41:49,221 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 18:41:49,222 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 18:41:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-04-17 18:41:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:41:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-04-17 18:41:49,235 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-04-17 18:41:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,235 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-04-17 18:41:49,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,236 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-04-17 18:41:49,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:49,237 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,237 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,237 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,238 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-04-17 18:41:49,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979857979] [2020-04-17 18:41:49,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979857979] [2020-04-17 18:41:49,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538123839] [2020-04-17 18:41:49,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,319 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-04-17 18:41:49,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,386 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-04-17 18:41:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:49,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,388 INFO L225 Difference]: With dead ends: 86 [2020-04-17 18:41:49,388 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 18:41:49,389 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 18:41:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-04-17 18:41:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 18:41:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-17 18:41:49,398 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-17 18:41:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,398 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-17 18:41:49,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-17 18:41:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:49,400 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,400 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,400 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-04-17 18:41:49,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703703779] [2020-04-17 18:41:49,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703703779] [2020-04-17 18:41:49,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89880906] [2020-04-17 18:41:49,505 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 [2020-04-17 18:41:49,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:49,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:49,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:49,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:49,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:49,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-17 18:41:49,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977533416] [2020-04-17 18:41:49,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:41:49,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:41:49,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:41:49,685 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-04-17 18:41:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,784 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-17 18:41:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:49,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-04-17 18:41:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,786 INFO L225 Difference]: With dead ends: 101 [2020-04-17 18:41:49,786 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 18:41:49,787 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 18:41:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-17 18:41:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 18:41:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-17 18:41:49,797 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-17 18:41:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,798 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-17 18:41:49,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:41:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-17 18:41:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:49,799 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,799 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:50,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,001 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:50,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-17 18:41:50,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:50,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498206344] [2020-04-17 18:41:50,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498206344] [2020-04-17 18:41:50,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511443441] [2020-04-17 18:41:50,096 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 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 [2020-04-17 18:41:50,145 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:50,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:50,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:50,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:50,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:50,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362847054] [2020-04-17 18:41:50,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:50,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:50,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:50,340 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-04-17 18:41:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:50,382 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 18:41:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:41:50,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:50,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:50,383 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:41:50,384 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 18:41:50,384 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 18:41:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-04-17 18:41:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:41:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-04-17 18:41:50,402 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-04-17 18:41:50,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:50,403 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-04-17 18:41:50,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:50,403 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-04-17 18:41:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:50,404 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:50,404 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:50,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,617 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:50,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-04-17 18:41:50,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:50,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610003243] [2020-04-17 18:41:50,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610003243] [2020-04-17 18:41:50,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917833214] [2020-04-17 18:41:50,682 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,731 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:41:50,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:50,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:50,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:50,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:50,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200794995] [2020-04-17 18:41:50,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:50,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:50,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:50,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:50,796 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-04-17 18:41:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:50,852 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-04-17 18:41:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:50,852 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:50,853 INFO L225 Difference]: With dead ends: 90 [2020-04-17 18:41:50,853 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 18:41:50,854 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:41:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 18:41:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-04-17 18:41:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 18:41:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-04-17 18:41:50,861 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-04-17 18:41:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:50,861 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-04-17 18:41:50,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-04-17 18:41:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:50,862 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:50,862 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:51,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:51,063 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:51,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-04-17 18:41:51,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:51,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919193247] [2020-04-17 18:41:51,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919193247] [2020-04-17 18:41:51,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141938026] [2020-04-17 18:41:51,125 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:41:51,168 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:51,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:51,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:51,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:51,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:51,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:51,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915024915] [2020-04-17 18:41:51,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:51,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:51,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:51,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:51,227 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-04-17 18:41:51,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:51,339 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 18:41:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:51,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:51,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:51,340 INFO L225 Difference]: With dead ends: 99 [2020-04-17 18:41:51,340 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 18:41:51,341 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:51,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 18:41:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-04-17 18:41:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 18:41:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-04-17 18:41:51,348 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-04-17 18:41:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:51,348 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-04-17 18:41:51,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-04-17 18:41:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:51,350 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:51,350 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:51,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:51,561 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:51,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:51,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-17 18:41:51,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:51,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935791501] [2020-04-17 18:41:51,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935791501] [2020-04-17 18:41:51,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:51,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:51,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286174670] [2020-04-17 18:41:51,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:51,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:51,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:51,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:51,644 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-04-17 18:41:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:51,681 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-04-17 18:41:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:41:51,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:51,682 INFO L225 Difference]: With dead ends: 92 [2020-04-17 18:41:51,683 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 18:41:51,683 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 18:41:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-04-17 18:41:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 18:41:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-04-17 18:41:51,695 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-04-17 18:41:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:51,696 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-04-17 18:41:51,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-04-17 18:41:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:51,697 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:51,697 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:51,697 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-04-17 18:41:51,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:51,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217624213] [2020-04-17 18:41:51,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217624213] [2020-04-17 18:41:51,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:51,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:51,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417669246] [2020-04-17 18:41:51,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:51,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:51,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:51,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:51,807 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-04-17 18:41:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:51,851 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-04-17 18:41:51,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:51,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:51,852 INFO L225 Difference]: With dead ends: 100 [2020-04-17 18:41:51,853 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:41:51,853 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:51,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:41:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-04-17 18:41:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 18:41:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-04-17 18:41:51,859 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-04-17 18:41:51,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:51,859 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-04-17 18:41:51,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-04-17 18:41:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:51,860 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:51,860 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:51,861 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:51,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-04-17 18:41:51,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:51,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934451810] [2020-04-17 18:41:51,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934451810] [2020-04-17 18:41:51,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:51,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:51,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940744106] [2020-04-17 18:41:51,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:51,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:51,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:51,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:51,931 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-04-17 18:41:52,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,014 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 18:41:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:52,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,016 INFO L225 Difference]: With dead ends: 105 [2020-04-17 18:41:52,016 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 18:41:52,017 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 18:41:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 18:41:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:41:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-04-17 18:41:52,022 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-04-17 18:41:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,022 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-04-17 18:41:52,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,023 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-04-17 18:41:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,023 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,024 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,024 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-17 18:41:52,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399614552] [2020-04-17 18:41:52,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399614552] [2020-04-17 18:41:52,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471329021] [2020-04-17 18:41:52,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,099 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-04-17 18:41:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,177 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 18:41:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:52,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,179 INFO L225 Difference]: With dead ends: 105 [2020-04-17 18:41:52,180 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 18:41:52,180 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 18:41:52,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 18:41:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:41:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-04-17 18:41:52,186 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-04-17 18:41:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,186 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-04-17 18:41:52,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-04-17 18:41:52,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,187 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,188 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,188 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-04-17 18:41:52,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186349835] [2020-04-17 18:41:52,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186349835] [2020-04-17 18:41:52,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651874079] [2020-04-17 18:41:52,252 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:41:52,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:52,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:52,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:52,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:52,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:52,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 18:41:52,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220526471] [2020-04-17 18:41:52,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:41:52,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:41:52,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:52,418 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-04-17 18:41:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,548 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-04-17 18:41:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:52,549 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-04-17 18:41:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,550 INFO L225 Difference]: With dead ends: 122 [2020-04-17 18:41:52,550 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:41:52,551 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:41:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:41:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-04-17 18:41:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 18:41:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-04-17 18:41:52,555 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-04-17 18:41:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,555 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-04-17 18:41:52,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:41:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-04-17 18:41:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,556 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,556 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:52,759 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-17 18:41:52,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684301053] [2020-04-17 18:41:52,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684301053] [2020-04-17 18:41:52,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801683550] [2020-04-17 18:41:52,846 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 [2020-04-17 18:41:52,895 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:52,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:52,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:52,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:52,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:52,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397936458] [2020-04-17 18:41:52,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:52,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:52,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:52,969 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-04-17 18:41:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:53,013 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 18:41:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:53,015 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:53,017 INFO L225 Difference]: With dead ends: 108 [2020-04-17 18:41:53,017 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 18:41:53,017 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:53,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 18:41:53,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-04-17 18:41:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 18:41:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-04-17 18:41:53,023 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-04-17 18:41:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:53,023 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-04-17 18:41:53,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-04-17 18:41:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:53,024 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:53,024 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:53,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,229 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:53,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-04-17 18:41:53,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:53,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870107647] [2020-04-17 18:41:53,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870107647] [2020-04-17 18:41:53,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948090046] [2020-04-17 18:41:53,323 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:41:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:53,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:53,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:53,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000780384] [2020-04-17 18:41:53,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:53,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:53,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:53,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:53,539 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-04-17 18:41:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:53,608 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-04-17 18:41:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:53,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:53,610 INFO L225 Difference]: With dead ends: 116 [2020-04-17 18:41:53,610 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 18:41:53,615 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 18:41:53,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-04-17 18:41:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:41:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-04-17 18:41:53,624 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-04-17 18:41:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:53,625 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-04-17 18:41:53,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:53,625 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-04-17 18:41:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:53,626 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:53,628 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:53,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,832 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:53,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-04-17 18:41:53,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:53,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074996591] [2020-04-17 18:41:53,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074996591] [2020-04-17 18:41:53,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942346076] [2020-04-17 18:41:53,910 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 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 [2020-04-17 18:41:53,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:53,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:53,955 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:53,956 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:54,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:54,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587355463] [2020-04-17 18:41:54,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:54,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:54,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:54,030 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-04-17 18:41:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:54,133 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-04-17 18:41:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:54,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:54,136 INFO L225 Difference]: With dead ends: 115 [2020-04-17 18:41:54,136 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 18:41:54,136 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:54,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 18:41:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-04-17 18:41:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 18:41:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-04-17 18:41:54,140 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-04-17 18:41:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:54,141 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-04-17 18:41:54,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-04-17 18:41:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:54,142 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:54,142 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:54,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:54,345 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-04-17 18:41:54,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:54,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101982486] [2020-04-17 18:41:54,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101982486] [2020-04-17 18:41:54,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126180347] [2020-04-17 18:41:54,404 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 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 [2020-04-17 18:41:54,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:54,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:54,454 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:54,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:54,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:54,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:54,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035704556] [2020-04-17 18:41:54,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:54,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:54,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:54,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:54,526 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-04-17 18:41:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:54,641 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-04-17 18:41:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:54,642 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:54,643 INFO L225 Difference]: With dead ends: 124 [2020-04-17 18:41:54,643 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 18:41:54,643 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:41:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 18:41:54,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-04-17 18:41:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 18:41:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-04-17 18:41:54,647 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-04-17 18:41:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:54,648 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-04-17 18:41:54,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-04-17 18:41:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:54,648 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:54,649 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:54,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:54,855 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:54,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-17 18:41:54,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:54,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539995392] [2020-04-17 18:41:54,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539995392] [2020-04-17 18:41:54,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171686199] [2020-04-17 18:41:54,922 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:41:54,970 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:54,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:54,971 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:54,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:55,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:55,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819683496] [2020-04-17 18:41:55,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:55,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:55,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:55,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:55,057 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-04-17 18:41:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:55,097 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-04-17 18:41:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:55,098 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:55,099 INFO L225 Difference]: With dead ends: 113 [2020-04-17 18:41:55,099 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 18:41:55,100 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 18:41:55,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-04-17 18:41:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 18:41:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-04-17 18:41:55,105 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-04-17 18:41:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:55,105 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-04-17 18:41:55,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-04-17 18:41:55,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:55,106 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:55,106 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:55,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,307 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:55,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-04-17 18:41:55,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:55,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970615376] [2020-04-17 18:41:55,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970615376] [2020-04-17 18:41:55,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130572794] [2020-04-17 18:41:55,395 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 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 [2020-04-17 18:41:55,440 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:55,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:55,441 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:55,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:55,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:55,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090372320] [2020-04-17 18:41:55,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:55,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:55,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:55,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:55,504 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-04-17 18:41:55,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:55,576 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-04-17 18:41:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:55,577 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:55,578 INFO L225 Difference]: With dead ends: 118 [2020-04-17 18:41:55,578 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 18:41:55,578 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 18:41:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-04-17 18:41:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 18:41:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-04-17 18:41:55,582 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-04-17 18:41:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:55,582 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-04-17 18:41:55,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-04-17 18:41:55,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:55,583 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:55,583 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:55,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,787 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:55,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-04-17 18:41:55,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:55,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776535044] [2020-04-17 18:41:55,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776535044] [2020-04-17 18:41:55,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372919071] [2020-04-17 18:41:55,870 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:41:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:55,926 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:55,927 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:56,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:56,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983649705] [2020-04-17 18:41:56,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:56,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:56,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:56,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:56,009 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-04-17 18:41:56,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:56,091 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-04-17 18:41:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:56,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:56,093 INFO L225 Difference]: With dead ends: 119 [2020-04-17 18:41:56,093 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:41:56,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:56,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:41:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-04-17 18:41:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 18:41:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-04-17 18:41:56,097 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-04-17 18:41:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:56,097 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-04-17 18:41:56,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-04-17 18:41:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:56,098 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:56,098 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:56,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,299 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:56,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-04-17 18:41:56,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:56,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851783664] [2020-04-17 18:41:56,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851783664] [2020-04-17 18:41:56,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482050892] [2020-04-17 18:41:56,395 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 [2020-04-17 18:41:56,452 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:56,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:56,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:56,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:56,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:56,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705859526] [2020-04-17 18:41:56,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:56,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:56,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:56,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:56,541 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-04-17 18:41:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:56,603 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-04-17 18:41:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:56,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:56,605 INFO L225 Difference]: With dead ends: 122 [2020-04-17 18:41:56,605 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 18:41:56,605 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 18:41:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-04-17 18:41:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-04-17 18:41:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-04-17 18:41:56,611 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-04-17 18:41:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:56,611 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-04-17 18:41:56,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-04-17 18:41:56,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:56,612 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:56,612 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:56,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,813 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:56,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:56,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-04-17 18:41:56,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:56,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475946815] [2020-04-17 18:41:56,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475946815] [2020-04-17 18:41:56,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638499111] [2020-04-17 18:41:56,873 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:56,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:56,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:56,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:57,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:57,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247764032] [2020-04-17 18:41:57,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:57,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:57,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:57,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:57,013 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-04-17 18:41:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:57,111 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-04-17 18:41:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:41:57,112 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:57,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:57,113 INFO L225 Difference]: With dead ends: 123 [2020-04-17 18:41:57,113 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 18:41:57,113 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:41:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 18:41:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-04-17 18:41:57,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:41:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-04-17 18:41:57,117 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-04-17 18:41:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:57,117 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-04-17 18:41:57,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-04-17 18:41:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:57,118 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:57,118 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:57,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,321 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:57,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-04-17 18:41:57,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:57,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108731312] [2020-04-17 18:41:57,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108731312] [2020-04-17 18:41:57,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787287484] [2020-04-17 18:41:57,399 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,446 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:41:57,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:57,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:57,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:57,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:57,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129372162] [2020-04-17 18:41:57,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:57,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:57,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:57,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:57,517 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-04-17 18:41:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:57,595 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 18:41:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:57,596 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:57,597 INFO L225 Difference]: With dead ends: 123 [2020-04-17 18:41:57,597 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 18:41:57,597 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:57,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 18:41:57,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-04-17 18:41:57,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-04-17 18:41:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-04-17 18:41:57,601 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-04-17 18:41:57,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:57,602 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-04-17 18:41:57,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:57,602 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-04-17 18:41:57,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:57,603 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:57,603 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:57,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,804 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:57,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-04-17 18:41:57,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:57,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435763124] [2020-04-17 18:41:57,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435763124] [2020-04-17 18:41:57,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304660573] [2020-04-17 18:41:57,857 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,901 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:57,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:57,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:57,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:57,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:57,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:57,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233517891] [2020-04-17 18:41:57,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:57,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:57,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:57,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:57,978 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-04-17 18:41:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:58,163 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-04-17 18:41:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:58,163 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:58,164 INFO L225 Difference]: With dead ends: 133 [2020-04-17 18:41:58,165 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 18:41:58,165 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:41:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 18:41:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-04-17 18:41:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-04-17 18:41:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-04-17 18:41:58,169 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-04-17 18:41:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:58,170 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-04-17 18:41:58,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:58,170 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-04-17 18:41:58,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:58,171 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:58,171 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:58,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,372 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:58,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-04-17 18:41:58,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:58,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476786942] [2020-04-17 18:41:58,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476786942] [2020-04-17 18:41:58,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286558004] [2020-04-17 18:41:58,456 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,528 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:58,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:58,530 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:58,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:58,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:58,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503669277] [2020-04-17 18:41:58,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:58,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:58,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:58,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:58,632 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-04-17 18:41:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:58,749 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-04-17 18:41:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:41:58,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:58,751 INFO L225 Difference]: With dead ends: 127 [2020-04-17 18:41:58,751 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 18:41:58,751 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:41:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 18:41:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-04-17 18:41:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 18:41:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 18:41:58,755 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 18:41:58,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:58,755 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 18:41:58,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 18:41:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:58,756 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:58,756 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:58,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,960 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:58,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:58,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-04-17 18:41:58,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:58,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132250297] [2020-04-17 18:41:58,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132250297] [2020-04-17 18:41:59,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489294314] [2020-04-17 18:41:59,043 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:59,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:59,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:59,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:59,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:59,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718510147] [2020-04-17 18:41:59,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:59,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:59,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:59,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:59,153 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 18:41:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:59,389 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-04-17 18:41:59,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:41:59,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:59,390 INFO L225 Difference]: With dead ends: 141 [2020-04-17 18:41:59,390 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 18:41:59,391 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:41:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 18:41:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-04-17 18:41:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 18:41:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 18:41:59,395 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 18:41:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:59,396 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 18:41:59,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 18:41:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:59,398 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:59,399 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:59,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:59,602 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:59,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-04-17 18:41:59,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:59,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250878226] [2020-04-17 18:41:59,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250878226] [2020-04-17 18:41:59,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714109081] [2020-04-17 18:41:59,701 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 [2020-04-17 18:41:59,764 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:59,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:59,765 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:59,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:59,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:59,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:59,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523439292] [2020-04-17 18:41:59,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:59,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:59,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:59,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:59,830 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 18:41:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:59,980 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-04-17 18:41:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:59,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:59,981 INFO L225 Difference]: With dead ends: 136 [2020-04-17 18:41:59,981 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 18:41:59,982 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:41:59,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 18:41:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-04-17 18:41:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:41:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-04-17 18:41:59,986 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-04-17 18:41:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:59,987 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-04-17 18:41:59,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-04-17 18:41:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:59,988 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:59,988 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:00,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,192 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:00,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-04-17 18:42:00,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:00,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535984480] [2020-04-17 18:42:00,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535984480] [2020-04-17 18:42:00,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459131278] [2020-04-17 18:42:00,249 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:00,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:00,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:00,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:00,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:00,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068290610] [2020-04-17 18:42:00,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:00,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:00,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:00,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:00,376 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-04-17 18:42:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:00,477 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-04-17 18:42:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:00,478 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:00,479 INFO L225 Difference]: With dead ends: 130 [2020-04-17 18:42:00,479 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 18:42:00,479 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:00,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 18:42:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-04-17 18:42:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:42:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 18:42:00,484 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 18:42:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:00,484 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 18:42:00,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:00,484 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 18:42:00,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:00,485 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:00,485 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:00,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,689 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:00,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-04-17 18:42:00,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:00,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936516998] [2020-04-17 18:42:00,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936516998] [2020-04-17 18:42:00,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911700401] [2020-04-17 18:42:00,746 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,783 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:00,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:00,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:00,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:00,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:00,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435372174] [2020-04-17 18:42:00,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:00,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:00,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:00,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:00,874 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 18:42:01,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:01,000 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-04-17 18:42:01,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:01,001 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:01,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:01,002 INFO L225 Difference]: With dead ends: 131 [2020-04-17 18:42:01,002 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 18:42:01,002 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 18:42:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-04-17 18:42:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:42:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 18:42:01,008 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 18:42:01,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:01,009 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 18:42:01,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:01,009 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 18:42:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:01,010 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:01,010 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:01,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,214 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:01,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-04-17 18:42:01,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:01,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490748447] [2020-04-17 18:42:01,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490748447] [2020-04-17 18:42:01,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707187279] [2020-04-17 18:42:01,283 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,339 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:01,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:01,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:01,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:01,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:01,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:01,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805819920] [2020-04-17 18:42:01,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:01,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:01,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:01,399 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 18:42:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:01,535 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-04-17 18:42:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:01,536 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:01,537 INFO L225 Difference]: With dead ends: 131 [2020-04-17 18:42:01,537 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 18:42:01,538 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 18:42:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-04-17 18:42:01,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:42:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 18:42:01,545 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 18:42:01,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:01,546 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 18:42:01,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 18:42:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:01,547 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:01,547 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:01,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,750 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:01,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:01,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-04-17 18:42:01,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:01,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362576005] [2020-04-17 18:42:01,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362576005] [2020-04-17 18:42:01,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332463521] [2020-04-17 18:42:01,797 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,841 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:01,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:01,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:01,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:01,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:01,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:01,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226257258] [2020-04-17 18:42:01,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:01,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:01,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:01,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:01,896 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 18:42:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:02,106 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-04-17 18:42:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:02,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:02,108 INFO L225 Difference]: With dead ends: 145 [2020-04-17 18:42:02,108 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 18:42:02,109 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 18:42:02,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-04-17 18:42:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:42:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 18:42:02,113 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 18:42:02,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:02,113 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 18:42:02,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:02,113 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 18:42:02,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:02,114 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:02,114 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:02,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,318 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:02,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-04-17 18:42:02,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:02,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629133351] [2020-04-17 18:42:02,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:02,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629133351] [2020-04-17 18:42:02,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743390420] [2020-04-17 18:42:02,372 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:02,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:02,411 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:02,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:02,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:02,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:02,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525056573] [2020-04-17 18:42:02,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:02,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:02,470 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 18:42:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:02,643 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-04-17 18:42:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:02,644 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:02,645 INFO L225 Difference]: With dead ends: 135 [2020-04-17 18:42:02,646 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 18:42:02,646 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:02,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 18:42:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-04-17 18:42:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 18:42:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-04-17 18:42:02,650 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-04-17 18:42:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:02,650 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-04-17 18:42:02,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-04-17 18:42:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:02,651 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:02,651 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:02,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,854 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:02,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-04-17 18:42:02,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:02,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084478802] [2020-04-17 18:42:02,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:02,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084478802] [2020-04-17 18:42:02,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960203615] [2020-04-17 18:42:02,914 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:42:02,958 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:02,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:02,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:02,960 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:03,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:03,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 18:42:03,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352994750] [2020-04-17 18:42:03,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:42:03,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:03,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:42:03,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:03,061 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-04-17 18:42:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:03,216 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-04-17 18:42:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:03,217 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-04-17 18:42:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:03,218 INFO L225 Difference]: With dead ends: 143 [2020-04-17 18:42:03,218 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 18:42:03,218 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:03,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 18:42:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-04-17 18:42:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-04-17 18:42:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-04-17 18:42:03,223 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-04-17 18:42:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:03,223 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-04-17 18:42:03,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:42:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-04-17 18:42:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:03,224 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:03,224 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:03,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:03,427 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:03,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-04-17 18:42:03,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:03,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612134232] [2020-04-17 18:42:03,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612134232] [2020-04-17 18:42:03,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547096496] [2020-04-17 18:42:03,523 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 [2020-04-17 18:42:03,571 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:03,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:03,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:03,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:03,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:03,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27476071] [2020-04-17 18:42:03,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:03,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:03,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:03,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:03,660 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-04-17 18:42:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:03,708 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-04-17 18:42:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:42:03,708 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:03,710 INFO L225 Difference]: With dead ends: 132 [2020-04-17 18:42:03,710 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 18:42:03,710 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 18:42:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-04-17 18:42:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 18:42:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 18:42:03,715 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 18:42:03,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:03,715 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 18:42:03,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 18:42:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:03,716 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:03,716 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:03,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:03,919 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:03,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-04-17 18:42:03,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:03,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159989710] [2020-04-17 18:42:03,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159989710] [2020-04-17 18:42:04,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085967918] [2020-04-17 18:42:04,010 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:42:04,048 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:04,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:04,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:04,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:04,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:04,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94677037] [2020-04-17 18:42:04,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:04,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:04,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:04,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:04,162 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 18:42:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:04,222 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-04-17 18:42:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:04,223 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:04,224 INFO L225 Difference]: With dead ends: 143 [2020-04-17 18:42:04,224 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 18:42:04,225 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 18:42:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-04-17 18:42:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 18:42:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 18:42:04,229 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 18:42:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:04,230 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 18:42:04,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 18:42:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:04,231 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:04,231 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:04,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,434 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:04,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-04-17 18:42:04,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:04,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803874890] [2020-04-17 18:42:04,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803874890] [2020-04-17 18:42:04,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164604184] [2020-04-17 18:42:04,525 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,567 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:04,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:04,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:04,568 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:04,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:04,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271318853] [2020-04-17 18:42:04,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:04,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:04,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:04,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:04,650 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 18:42:04,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:04,731 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-04-17 18:42:04,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:04,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:04,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:04,732 INFO L225 Difference]: With dead ends: 142 [2020-04-17 18:42:04,732 INFO L226 Difference]: Without dead ends: 139 [2020-04-17 18:42:04,733 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:04,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-04-17 18:42:04,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-04-17 18:42:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-04-17 18:42:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-04-17 18:42:04,735 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-04-17 18:42:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:04,735 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-04-17 18:42:04,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-04-17 18:42:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:04,736 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:04,736 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:04,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,937 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:04,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-04-17 18:42:04,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:04,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73925131] [2020-04-17 18:42:04,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73925131] [2020-04-17 18:42:04,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545476270] [2020-04-17 18:42:04,995 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:05,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:05,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:05,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:05,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561862496] [2020-04-17 18:42:05,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:05,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:05,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:05,169 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-04-17 18:42:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:05,306 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-04-17 18:42:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:05,307 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:05,309 INFO L225 Difference]: With dead ends: 141 [2020-04-17 18:42:05,309 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 18:42:05,309 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:05,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 18:42:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-04-17 18:42:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 18:42:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-04-17 18:42:05,314 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-04-17 18:42:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:05,315 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-04-17 18:42:05,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-04-17 18:42:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:05,316 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:05,316 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:05,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,517 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:05,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-04-17 18:42:05,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:05,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403507371] [2020-04-17 18:42:05,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403507371] [2020-04-17 18:42:05,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192529555] [2020-04-17 18:42:05,598 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:05,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:05,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:05,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:05,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:05,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:05,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686759616] [2020-04-17 18:42:05,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:05,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:05,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:05,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:05,733 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-04-17 18:42:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:05,934 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 18:42:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:05,934 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:05,936 INFO L225 Difference]: With dead ends: 150 [2020-04-17 18:42:05,936 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 18:42:05,937 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 18:42:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-04-17 18:42:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-04-17 18:42:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-04-17 18:42:05,942 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-04-17 18:42:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:05,943 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-04-17 18:42:05,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-04-17 18:42:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:05,944 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:05,944 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:06,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,150 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:06,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-04-17 18:42:06,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:06,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994197010] [2020-04-17 18:42:06,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994197010] [2020-04-17 18:42:06,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110695842] [2020-04-17 18:42:06,257 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 [2020-04-17 18:42:06,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:06,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:06,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:06,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:06,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:06,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613387311] [2020-04-17 18:42:06,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:06,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:06,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:06,478 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-04-17 18:42:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:06,547 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-04-17 18:42:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:42:06,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:06,550 INFO L225 Difference]: With dead ends: 138 [2020-04-17 18:42:06,550 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 18:42:06,550 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 18:42:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-04-17 18:42:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 18:42:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-04-17 18:42:06,556 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-04-17 18:42:06,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:06,557 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-04-17 18:42:06,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:06,557 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-04-17 18:42:06,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:06,558 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:06,558 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:06,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,763 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-04-17 18:42:06,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:06,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211006366] [2020-04-17 18:42:06,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211006366] [2020-04-17 18:42:06,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618809290] [2020-04-17 18:42:06,837 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 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 [2020-04-17 18:42:06,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:06,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:06,886 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:06,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:07,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:07,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797277498] [2020-04-17 18:42:07,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:07,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:07,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:07,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:07,006 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-04-17 18:42:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:07,138 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-04-17 18:42:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:07,138 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:07,139 INFO L225 Difference]: With dead ends: 145 [2020-04-17 18:42:07,139 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 18:42:07,140 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 18:42:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-04-17 18:42:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-04-17 18:42:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-04-17 18:42:07,144 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-04-17 18:42:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:07,144 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-04-17 18:42:07,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-04-17 18:42:07,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:07,145 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:07,145 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:07,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:07,349 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:07,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:07,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-04-17 18:42:07,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:07,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749627090] [2020-04-17 18:42:07,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749627090] [2020-04-17 18:42:07,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381495902] [2020-04-17 18:42:07,430 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 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 [2020-04-17 18:42:07,470 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:07,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:07,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:07,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:07,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:07,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039474564] [2020-04-17 18:42:07,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:07,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:07,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:07,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:07,553 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-04-17 18:42:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:07,683 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 18:42:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:07,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:07,684 INFO L225 Difference]: With dead ends: 150 [2020-04-17 18:42:07,685 INFO L226 Difference]: Without dead ends: 148 [2020-04-17 18:42:07,685 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-17 18:42:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-04-17 18:42:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-04-17 18:42:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-04-17 18:42:07,690 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-04-17 18:42:07,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:07,690 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-04-17 18:42:07,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-04-17 18:42:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:07,691 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:07,691 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:07,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:07,895 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:07,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-04-17 18:42:07,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:07,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442041912] [2020-04-17 18:42:07,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442041912] [2020-04-17 18:42:08,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598757238] [2020-04-17 18:42:08,005 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:42:08,048 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:08,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:08,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:08,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:08,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:08,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029079966] [2020-04-17 18:42:08,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:08,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:08,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:08,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:08,137 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:08,276 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-04-17 18:42:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:08,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:08,278 INFO L225 Difference]: With dead ends: 148 [2020-04-17 18:42:08,278 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 18:42:08,278 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 18:42:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-04-17 18:42:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 18:42:08,282 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 18:42:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:08,283 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 18:42:08,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 18:42:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:08,283 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:08,284 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:08,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:08,487 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:08,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-04-17 18:42:08,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:08,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765821289] [2020-04-17 18:42:08,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765821289] [2020-04-17 18:42:08,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600204727] [2020-04-17 18:42:08,569 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 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 [2020-04-17 18:42:08,610 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:08,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:08,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:08,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:08,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:08,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191886738] [2020-04-17 18:42:08,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:08,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:08,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:08,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:08,690 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 18:42:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:08,810 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-04-17 18:42:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:08,810 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:08,811 INFO L225 Difference]: With dead ends: 149 [2020-04-17 18:42:08,812 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 18:42:08,812 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:08,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 18:42:08,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-04-17 18:42:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-04-17 18:42:08,816 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-04-17 18:42:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:08,817 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-04-17 18:42:08,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-04-17 18:42:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:08,817 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:08,817 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:09,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:09,021 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:09,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:09,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-04-17 18:42:09,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:09,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139426756] [2020-04-17 18:42:09,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139426756] [2020-04-17 18:42:09,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287442324] [2020-04-17 18:42:09,109 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:42:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,149 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:09,150 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:09,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:09,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307790484] [2020-04-17 18:42:09,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:09,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:09,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:09,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:09,258 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-04-17 18:42:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:09,317 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-04-17 18:42:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:09,318 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:09,319 INFO L225 Difference]: With dead ends: 152 [2020-04-17 18:42:09,319 INFO L226 Difference]: Without dead ends: 150 [2020-04-17 18:42:09,320 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-04-17 18:42:09,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-04-17 18:42:09,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-04-17 18:42:09,324 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-04-17 18:42:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:09,325 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-04-17 18:42:09,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:09,325 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-04-17 18:42:09,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:09,325 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:09,326 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:09,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:09,529 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-04-17 18:42:09,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:09,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185192700] [2020-04-17 18:42:09,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185192700] [2020-04-17 18:42:09,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554979915] [2020-04-17 18:42:09,605 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 [2020-04-17 18:42:09,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:09,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:09,647 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:09,648 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:09,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:09,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80261295] [2020-04-17 18:42:09,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:09,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:09,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:09,737 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-04-17 18:42:09,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:09,870 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-04-17 18:42:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:09,871 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:09,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:09,872 INFO L225 Difference]: With dead ends: 153 [2020-04-17 18:42:09,872 INFO L226 Difference]: Without dead ends: 151 [2020-04-17 18:42:09,873 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-04-17 18:42:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-04-17 18:42:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 18:42:09,877 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 18:42:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:09,877 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 18:42:09,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 18:42:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:09,878 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:09,878 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:10,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:10,082 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:10,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:10,083 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-04-17 18:42:10,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:10,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385193316] [2020-04-17 18:42:10,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385193316] [2020-04-17 18:42:10,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730394522] [2020-04-17 18:42:10,165 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 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 [2020-04-17 18:42:10,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:10,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:10,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:10,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:10,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:10,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785072308] [2020-04-17 18:42:10,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:10,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:10,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:10,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:10,301 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 18:42:10,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:10,447 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:10,448 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:10,450 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:10,450 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 18:42:10,450 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 18:42:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-04-17 18:42:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 18:42:10,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-04-17 18:42:10,454 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-04-17 18:42:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:10,454 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-04-17 18:42:10,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:10,455 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-04-17 18:42:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:10,455 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:10,455 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:10,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:10,659 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:10,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:10,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-04-17 18:42:10,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:10,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880453395] [2020-04-17 18:42:10,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880453395] [2020-04-17 18:42:10,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773379355] [2020-04-17 18:42:10,779 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 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 [2020-04-17 18:42:10,843 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:10,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:10,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:10,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:10,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:10,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861026946] [2020-04-17 18:42:10,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:10,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:10,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:10,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:10,993 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-04-17 18:42:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:11,096 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-04-17 18:42:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:11,097 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:11,098 INFO L225 Difference]: With dead ends: 148 [2020-04-17 18:42:11,098 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 18:42:11,098 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:11,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 18:42:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-04-17 18:42:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 18:42:11,103 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 18:42:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:11,103 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 18:42:11,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 18:42:11,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:11,104 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:11,104 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:11,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:11,309 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:11,310 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-04-17 18:42:11,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:11,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560580640] [2020-04-17 18:42:11,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560580640] [2020-04-17 18:42:11,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799495482] [2020-04-17 18:42:11,374 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:42:11,430 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:11,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:11,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:11,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:11,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:11,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881293052] [2020-04-17 18:42:11,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:11,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:11,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:11,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:11,547 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:11,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:11,677 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-04-17 18:42:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:11,678 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:11,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:11,679 INFO L225 Difference]: With dead ends: 157 [2020-04-17 18:42:11,679 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 18:42:11,680 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:11,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 18:42:11,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-04-17 18:42:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-04-17 18:42:11,683 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-04-17 18:42:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:11,683 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-04-17 18:42:11,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-04-17 18:42:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:11,684 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:11,684 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:11,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:11,888 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:11,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-04-17 18:42:11,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:11,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338625165] [2020-04-17 18:42:11,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338625165] [2020-04-17 18:42:11,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198742719] [2020-04-17 18:42:11,978 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:42:12,047 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:12,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:12,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:12,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:12,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:12,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481830630] [2020-04-17 18:42:12,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:12,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:12,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:12,155 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-04-17 18:42:12,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:12,248 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-04-17 18:42:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:12,249 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:12,250 INFO L225 Difference]: With dead ends: 149 [2020-04-17 18:42:12,250 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 18:42:12,250 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:12,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 18:42:12,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-04-17 18:42:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:12,255 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:12,255 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:12,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:12,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:12,256 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:12,256 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:12,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:12,460 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:12,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:12,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-04-17 18:42:12,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:12,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890787918] [2020-04-17 18:42:12,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890787918] [2020-04-17 18:42:12,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181023814] [2020-04-17 18:42:12,529 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:42:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:12,572 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:12,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:12,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:12,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:12,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929042307] [2020-04-17 18:42:12,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:12,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:12,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:12,673 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:12,915 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-04-17 18:42:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:12,916 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:12,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:12,917 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:12,917 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:12,918 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 18:42:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-04-17 18:42:12,922 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-04-17 18:42:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:12,923 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-04-17 18:42:12,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:12,923 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-04-17 18:42:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:12,923 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:12,924 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:13,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:13,127 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:13,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:13,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-04-17 18:42:13,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:13,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074066579] [2020-04-17 18:42:13,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074066579] [2020-04-17 18:42:13,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248262602] [2020-04-17 18:42:13,184 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 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 [2020-04-17 18:42:13,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:13,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:13,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:13,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:13,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:13,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117058437] [2020-04-17 18:42:13,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:13,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:13,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:13,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:13,307 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:13,479 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:13,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:13,480 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:13,480 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 18:42:13,481 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 18:42:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-04-17 18:42:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:13,484 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:13,484 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:13,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:13,484 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:13,485 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:13,485 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:13,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:13,688 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:13,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-04-17 18:42:13,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:13,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645499324] [2020-04-17 18:42:13,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645499324] [2020-04-17 18:42:13,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267683773] [2020-04-17 18:42:13,758 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:13,800 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:13,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:13,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:13,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:13,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:13,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:13,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577924277] [2020-04-17 18:42:13,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:13,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:13,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:13,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:13,902 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:14,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:14,256 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-04-17 18:42:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:14,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:14,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:14,258 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:14,258 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 18:42:14,258 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:42:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 18:42:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-04-17 18:42:14,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:14,263 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:14,264 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:14,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:14,264 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:14,265 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:14,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:14,468 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:14,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-04-17 18:42:14,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:14,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756094696] [2020-04-17 18:42:14,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:14,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756094696] [2020-04-17 18:42:14,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010415715] [2020-04-17 18:42:14,531 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:14,572 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:14,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:14,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:14,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:14,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:14,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:14,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:14,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267128610] [2020-04-17 18:42:14,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:14,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:14,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:14,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:14,667 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:14,891 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-04-17 18:42:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:14,891 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:14,893 INFO L225 Difference]: With dead ends: 166 [2020-04-17 18:42:14,893 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:14,893 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-04-17 18:42:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-04-17 18:42:14,898 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-04-17 18:42:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:14,898 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-04-17 18:42:14,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-04-17 18:42:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:14,899 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:14,899 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:15,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,102 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-04-17 18:42:15,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:15,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897687377] [2020-04-17 18:42:15,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897687377] [2020-04-17 18:42:15,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163371177] [2020-04-17 18:42:15,170 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,224 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:15,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:15,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:15,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:15,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:15,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588169856] [2020-04-17 18:42:15,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:15,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:15,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:15,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:15,320 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-04-17 18:42:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:15,474 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-04-17 18:42:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:15,474 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:15,476 INFO L225 Difference]: With dead ends: 163 [2020-04-17 18:42:15,476 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:15,476 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:15,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-04-17 18:42:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-04-17 18:42:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-04-17 18:42:15,480 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-04-17 18:42:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:15,480 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-04-17 18:42:15,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:15,480 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-04-17 18:42:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:15,481 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:15,481 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:15,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,684 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:15,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:15,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-04-17 18:42:15,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:15,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899730386] [2020-04-17 18:42:15,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899730386] [2020-04-17 18:42:15,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777169468] [2020-04-17 18:42:15,739 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,783 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:15,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:15,783 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:15,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:15,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:15,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229357529] [2020-04-17 18:42:15,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:15,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:15,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:15,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:15,908 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:16,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:16,152 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-04-17 18:42:16,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:16,153 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:16,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:16,154 INFO L225 Difference]: With dead ends: 170 [2020-04-17 18:42:16,155 INFO L226 Difference]: Without dead ends: 168 [2020-04-17 18:42:16,155 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-04-17 18:42:16,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-04-17 18:42:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-04-17 18:42:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-04-17 18:42:16,159 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-04-17 18:42:16,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:16,159 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-04-17 18:42:16,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-04-17 18:42:16,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:16,160 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:16,160 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:16,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:16,361 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:16,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:16,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-04-17 18:42:16,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:16,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649675890] [2020-04-17 18:42:16,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:16,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649675890] [2020-04-17 18:42:16,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262954908] [2020-04-17 18:42:16,421 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:16,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:16,461 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:16,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:16,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:16,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:16,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872950317] [2020-04-17 18:42:16,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:16,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:16,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:16,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:16,562 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-04-17 18:42:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:16,837 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-04-17 18:42:16,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:16,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:16,840 INFO L225 Difference]: With dead ends: 177 [2020-04-17 18:42:16,840 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 18:42:16,841 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:42:16,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 18:42:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-04-17 18:42:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-04-17 18:42:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-04-17 18:42:16,844 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-04-17 18:42:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:16,844 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-04-17 18:42:16,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-04-17 18:42:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:16,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:16,845 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:17,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,048 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-04-17 18:42:17,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:17,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661462639] [2020-04-17 18:42:17,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661462639] [2020-04-17 18:42:17,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665339222] [2020-04-17 18:42:17,106 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:17,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:17,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:17,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:17,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:17,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:17,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429575868] [2020-04-17 18:42:17,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:17,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:17,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:17,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:17,218 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-04-17 18:42:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:17,562 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-04-17 18:42:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:42:17,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:17,565 INFO L225 Difference]: With dead ends: 190 [2020-04-17 18:42:17,565 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 18:42:17,565 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:42:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 18:42:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-04-17 18:42:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-04-17 18:42:17,569 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-04-17 18:42:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:17,570 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-04-17 18:42:17,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-04-17 18:42:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:17,570 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:17,570 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:17,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,774 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:17,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-04-17 18:42:17,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:17,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841976417] [2020-04-17 18:42:17,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841976417] [2020-04-17 18:42:17,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310977431] [2020-04-17 18:42:17,830 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:17,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:17,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:17,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:17,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:17,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:17,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955819628] [2020-04-17 18:42:17,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:17,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:17,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:17,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:17,952 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-04-17 18:42:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:18,277 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-04-17 18:42:18,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:18,278 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:18,279 INFO L225 Difference]: With dead ends: 180 [2020-04-17 18:42:18,279 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 18:42:18,279 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:42:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 18:42:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-04-17 18:42:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-04-17 18:42:18,282 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-04-17 18:42:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:18,283 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-04-17 18:42:18,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-04-17 18:42:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:18,283 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:18,284 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:18,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:18,487 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:18,487 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-04-17 18:42:18,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:18,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507619185] [2020-04-17 18:42:18,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:18,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507619185] [2020-04-17 18:42:18,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146070545] [2020-04-17 18:42:18,549 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:18,592 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:18,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:18,592 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:18,593 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:18,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:18,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:18,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829538760] [2020-04-17 18:42:18,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:18,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:18,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:18,669 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-04-17 18:42:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:18,795 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-04-17 18:42:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:18,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:18,797 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:18,797 INFO L226 Difference]: Without dead ends: 162 [2020-04-17 18:42:18,797 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-04-17 18:42:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-04-17 18:42:18,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-04-17 18:42:18,801 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-04-17 18:42:18,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:18,801 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-04-17 18:42:18,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:18,801 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-04-17 18:42:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:18,801 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:18,801 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:19,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,002 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:19,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-04-17 18:42:19,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:19,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928350224] [2020-04-17 18:42:19,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928350224] [2020-04-17 18:42:19,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593664630] [2020-04-17 18:42:19,094 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,154 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:19,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:19,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:19,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:19,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:19,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100392107] [2020-04-17 18:42:19,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:19,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:19,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:19,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:19,275 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-04-17 18:42:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:19,476 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-04-17 18:42:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:19,477 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:19,479 INFO L225 Difference]: With dead ends: 161 [2020-04-17 18:42:19,479 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:19,479 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:19,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-04-17 18:42:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-04-17 18:42:19,484 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-04-17 18:42:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:19,485 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-04-17 18:42:19,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-04-17 18:42:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:19,486 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:19,486 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:19,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,689 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:19,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-04-17 18:42:19,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:19,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032715772] [2020-04-17 18:42:19,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032715772] [2020-04-17 18:42:19,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647652493] [2020-04-17 18:42:19,747 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,799 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:19,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:19,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:19,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:19,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:19,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190789648] [2020-04-17 18:42:19,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:19,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:19,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:19,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:19,884 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-04-17 18:42:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:20,076 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-04-17 18:42:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:20,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:20,077 INFO L225 Difference]: With dead ends: 165 [2020-04-17 18:42:20,078 INFO L226 Difference]: Without dead ends: 163 [2020-04-17 18:42:20,078 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-04-17 18:42:20,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-04-17 18:42:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-04-17 18:42:20,081 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-04-17 18:42:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:20,081 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-04-17 18:42:20,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-04-17 18:42:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:20,082 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:20,082 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:20,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,282 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:20,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-04-17 18:42:20,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:20,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642863962] [2020-04-17 18:42:20,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642863962] [2020-04-17 18:42:20,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391546197] [2020-04-17 18:42:20,333 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:20,372 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:20,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:20,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:20,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152403024] [2020-04-17 18:42:20,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:20,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:20,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:20,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:20,453 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-04-17 18:42:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:20,631 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-04-17 18:42:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:20,631 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:20,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:20,633 INFO L225 Difference]: With dead ends: 167 [2020-04-17 18:42:20,633 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 18:42:20,633 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 18:42:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-04-17 18:42:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 18:42:20,636 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 18:42:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:20,637 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 18:42:20,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:20,637 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 18:42:20,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:20,637 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:20,638 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:20,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,841 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:20,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:20,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-04-17 18:42:20,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:20,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463604767] [2020-04-17 18:42:20,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463604767] [2020-04-17 18:42:20,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921697662] [2020-04-17 18:42:20,933 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:20,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:20,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:20,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:21,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:21,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:21,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309019999] [2020-04-17 18:42:21,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:21,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:21,052 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:21,285 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-04-17 18:42:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:21,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:21,286 INFO L225 Difference]: With dead ends: 168 [2020-04-17 18:42:21,286 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 18:42:21,287 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 18:42:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-04-17 18:42:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 18:42:21,289 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 18:42:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:21,290 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 18:42:21,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 18:42:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:21,290 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:21,290 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:21,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:21,491 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:21,492 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-04-17 18:42:21,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:21,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298564986] [2020-04-17 18:42:21,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:21,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298564986] [2020-04-17 18:42:21,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141418951] [2020-04-17 18:42:21,550 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:21,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:21,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:21,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:21,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:21,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:21,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:21,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:21,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7563473] [2020-04-17 18:42:21,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:21,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:21,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:21,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:21,687 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:21,856 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-04-17 18:42:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:21,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:21,857 INFO L225 Difference]: With dead ends: 160 [2020-04-17 18:42:21,857 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 18:42:21,858 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 18:42:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-04-17 18:42:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 18:42:21,861 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 18:42:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:21,861 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 18:42:21,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 18:42:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:21,862 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:21,862 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:22,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,063 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:22,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-04-17 18:42:22,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:22,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094053099] [2020-04-17 18:42:22,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094053099] [2020-04-17 18:42:22,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18937299] [2020-04-17 18:42:22,117 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,167 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:22,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:22,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:22,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:22,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:22,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:22,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964381666] [2020-04-17 18:42:22,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:22,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:22,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:22,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:22,240 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:22,544 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-04-17 18:42:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:22,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:22,546 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:42:22,546 INFO L226 Difference]: Without dead ends: 181 [2020-04-17 18:42:22,546 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:42:22,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-04-17 18:42:22,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-04-17 18:42:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 18:42:22,550 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 18:42:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:22,550 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 18:42:22,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:22,551 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 18:42:22,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:22,551 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:22,551 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:22,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,754 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:22,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:22,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-04-17 18:42:22,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:22,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431281486] [2020-04-17 18:42:22,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431281486] [2020-04-17 18:42:22,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413229056] [2020-04-17 18:42:22,812 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,862 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:22,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:22,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:22,864 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:22,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:22,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692969582] [2020-04-17 18:42:22,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:22,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:22,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:22,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:22,940 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:23,154 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-04-17 18:42:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:23,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:23,156 INFO L225 Difference]: With dead ends: 169 [2020-04-17 18:42:23,156 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 18:42:23,156 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 18:42:23,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-04-17 18:42:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 18:42:23,160 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 18:42:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:23,160 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 18:42:23,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:23,160 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 18:42:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:23,161 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:23,161 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:23,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,364 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:23,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:23,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-04-17 18:42:23,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:23,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135050864] [2020-04-17 18:42:23,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135050864] [2020-04-17 18:42:23,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799374351] [2020-04-17 18:42:23,419 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,457 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:23,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:23,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:23,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:23,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:23,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:23,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20263528] [2020-04-17 18:42:23,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:23,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:23,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:23,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:23,519 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:23,829 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-04-17 18:42:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:42:23,829 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:23,831 INFO L225 Difference]: With dead ends: 192 [2020-04-17 18:42:23,831 INFO L226 Difference]: Without dead ends: 184 [2020-04-17 18:42:23,831 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:42:23,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-04-17 18:42:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-04-17 18:42:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 18:42:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-04-17 18:42:23,835 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-04-17 18:42:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:23,835 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-04-17 18:42:23,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-04-17 18:42:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:23,835 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:23,835 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:24,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,036 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-04-17 18:42:24,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:24,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840556441] [2020-04-17 18:42:24,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840556441] [2020-04-17 18:42:24,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994518300] [2020-04-17 18:42:24,103 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:24,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:24,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:24,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:24,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:24,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297710106] [2020-04-17 18:42:24,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:24,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:24,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:24,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:24,220 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-04-17 18:42:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:24,555 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-04-17 18:42:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:24,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:24,557 INFO L225 Difference]: With dead ends: 180 [2020-04-17 18:42:24,557 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 18:42:24,557 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:42:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 18:42:24,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-04-17 18:42:24,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 18:42:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-04-17 18:42:24,560 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-04-17 18:42:24,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:24,561 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-04-17 18:42:24,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-04-17 18:42:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:24,561 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:24,561 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:24,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,764 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:24,765 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-04-17 18:42:24,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:24,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203710191] [2020-04-17 18:42:24,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203710191] [2020-04-17 18:42:24,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948666879] [2020-04-17 18:42:24,872 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,919 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:24,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:24,920 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:24,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:25,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:25,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:25,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:42:25,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215700750] [2020-04-17 18:42:25,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:42:25,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:25,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:42:25,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:25,040 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-04-17 18:42:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:25,217 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-04-17 18:42:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:25,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-04-17 18:42:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:25,218 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:25,218 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:25,219 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 18:42:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-04-17 18:42:25,221 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-04-17 18:42:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:25,222 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-04-17 18:42:25,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:42:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-04-17 18:42:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:25,222 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:25,223 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:25,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:25,426 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:25,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-04-17 18:42:25,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:25,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447613812] [2020-04-17 18:42:25,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:25,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447613812] [2020-04-17 18:42:25,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543143502] [2020-04-17 18:42:25,535 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:25,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:25,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:25,594 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:25,594 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:25,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:25,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:25,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573222980] [2020-04-17 18:42:25,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:25,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:25,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:25,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:25,710 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-04-17 18:42:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:25,763 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:25,764 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:25,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:25,765 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:25,765 INFO L226 Difference]: Without dead ends: 153 [2020-04-17 18:42:25,765 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:25,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-04-17 18:42:25,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-04-17 18:42:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 18:42:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 18:42:25,769 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 18:42:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:25,770 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 18:42:25,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 18:42:25,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:25,770 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:25,770 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:25,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:25,974 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:25,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:25,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-04-17 18:42:25,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:25,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545714275] [2020-04-17 18:42:25,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545714275] [2020-04-17 18:42:26,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865682876] [2020-04-17 18:42:26,074 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,114 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:26,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:26,115 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:26,115 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:26,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:26,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066304126] [2020-04-17 18:42:26,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:26,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:26,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:26,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:26,210 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 18:42:26,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:26,282 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-04-17 18:42:26,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:26,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:26,284 INFO L225 Difference]: With dead ends: 170 [2020-04-17 18:42:26,284 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 18:42:26,284 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 18:42:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-04-17 18:42:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 18:42:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 18:42:26,287 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 18:42:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:26,288 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 18:42:26,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:26,288 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 18:42:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:26,288 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:26,288 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:26,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,489 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-04-17 18:42:26,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:26,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096235016] [2020-04-17 18:42:26,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096235016] [2020-04-17 18:42:26,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729570190] [2020-04-17 18:42:26,576 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,616 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:26,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:26,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:26,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:26,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:26,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878600966] [2020-04-17 18:42:26,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:26,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:26,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:26,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:26,720 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 18:42:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:26,809 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-04-17 18:42:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:26,809 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:26,811 INFO L225 Difference]: With dead ends: 169 [2020-04-17 18:42:26,811 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 18:42:26,811 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:26,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 18:42:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-04-17 18:42:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 18:42:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-04-17 18:42:26,814 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-04-17 18:42:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:26,815 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-04-17 18:42:26,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-04-17 18:42:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:26,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:26,815 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:27,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,018 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:27,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:27,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-04-17 18:42:27,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:27,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509324098] [2020-04-17 18:42:27,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509324098] [2020-04-17 18:42:27,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998264421] [2020-04-17 18:42:27,108 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,150 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:27,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:27,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:27,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:27,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:27,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930241544] [2020-04-17 18:42:27,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:27,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:27,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:27,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:27,254 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-04-17 18:42:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:27,367 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-04-17 18:42:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:27,367 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:27,368 INFO L225 Difference]: With dead ends: 168 [2020-04-17 18:42:27,368 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 18:42:27,368 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 18:42:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-04-17 18:42:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 18:42:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-04-17 18:42:27,372 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-04-17 18:42:27,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:27,372 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-04-17 18:42:27,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-04-17 18:42:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:27,373 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:27,373 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:27,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,577 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:27,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-04-17 18:42:27,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:27,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391271941] [2020-04-17 18:42:27,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391271941] [2020-04-17 18:42:27,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041043756] [2020-04-17 18:42:27,657 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:27,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:27,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:27,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:27,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310097140] [2020-04-17 18:42:27,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:27,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:27,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:27,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:27,804 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-04-17 18:42:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:27,946 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-04-17 18:42:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:27,947 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:27,948 INFO L225 Difference]: With dead ends: 167 [2020-04-17 18:42:27,948 INFO L226 Difference]: Without dead ends: 164 [2020-04-17 18:42:27,949 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-04-17 18:42:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-04-17 18:42:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 18:42:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-04-17 18:42:27,952 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-04-17 18:42:27,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:27,952 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-04-17 18:42:27,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:27,952 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-04-17 18:42:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:27,953 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:27,953 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:28,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:28,154 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:28,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:28,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-04-17 18:42:28,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:28,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095959846] [2020-04-17 18:42:28,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095959846] [2020-04-17 18:42:28,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046867407] [2020-04-17 18:42:28,237 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:28,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:28,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:28,275 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:28,276 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:28,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:28,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:28,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196516027] [2020-04-17 18:42:28,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:28,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:28,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:28,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:28,367 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-04-17 18:42:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:28,548 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-04-17 18:42:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:28,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:28,551 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:28,551 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 18:42:28,551 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 18:42:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-04-17 18:42:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 18:42:28,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-04-17 18:42:28,554 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-04-17 18:42:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:28,554 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-04-17 18:42:28,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-04-17 18:42:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:28,555 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:28,555 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:28,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:28,756 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-04-17 18:42:28,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:28,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830977031] [2020-04-17 18:42:28,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830977031] [2020-04-17 18:42:28,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944852289] [2020-04-17 18:42:28,839 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:28,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:28,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:28,879 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:28,879 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:28,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:28,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252631582] [2020-04-17 18:42:28,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:28,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:28,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:28,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:28,978 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-04-17 18:42:29,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:29,027 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-04-17 18:42:29,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:29,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:29,029 INFO L225 Difference]: With dead ends: 163 [2020-04-17 18:42:29,030 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:29,030 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-04-17 18:42:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 18:42:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-04-17 18:42:29,033 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-04-17 18:42:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:29,034 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-04-17 18:42:29,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-04-17 18:42:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:29,034 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:29,034 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:29,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,235 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:29,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:29,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-04-17 18:42:29,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:29,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849106732] [2020-04-17 18:42:29,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849106732] [2020-04-17 18:42:29,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546268574] [2020-04-17 18:42:29,324 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:29,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:29,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:29,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:29,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:29,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661816745] [2020-04-17 18:42:29,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:29,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:29,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:29,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:29,470 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:29,614 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-04-17 18:42:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:29,615 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:29,616 INFO L225 Difference]: With dead ends: 172 [2020-04-17 18:42:29,616 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 18:42:29,616 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 18:42:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-04-17 18:42:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 18:42:29,620 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 18:42:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:29,620 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 18:42:29,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 18:42:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:29,621 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:29,621 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:29,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,822 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:29,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:29,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-04-17 18:42:29,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:29,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244189143] [2020-04-17 18:42:29,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244189143] [2020-04-17 18:42:29,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441807643] [2020-04-17 18:42:29,905 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,946 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:29,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:29,947 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:29,947 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:30,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:30,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:30,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736257291] [2020-04-17 18:42:30,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:30,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:30,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:30,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:30,079 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 18:42:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:30,262 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 18:42:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:30,263 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:30,264 INFO L225 Difference]: With dead ends: 179 [2020-04-17 18:42:30,264 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:42:30,265 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:42:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-04-17 18:42:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 18:42:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-04-17 18:42:30,268 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-04-17 18:42:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:30,268 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-04-17 18:42:30,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-04-17 18:42:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:30,269 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:30,269 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:30,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:30,470 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-04-17 18:42:30,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:30,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322973848] [2020-04-17 18:42:30,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:30,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322973848] [2020-04-17 18:42:30,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140099880] [2020-04-17 18:42:30,558 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:30,600 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:30,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:30,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:30,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:30,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:30,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:30,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459507500] [2020-04-17 18:42:30,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:30,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:30,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:30,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:30,707 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-04-17 18:42:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:30,883 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 18:42:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:30,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:30,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:30,885 INFO L225 Difference]: With dead ends: 179 [2020-04-17 18:42:30,885 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:42:30,886 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:42:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-04-17 18:42:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 18:42:30,889 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 18:42:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:30,889 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 18:42:30,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 18:42:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:30,890 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:30,890 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:31,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:31,093 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:31,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:31,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-04-17 18:42:31,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:31,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691886672] [2020-04-17 18:42:31,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:31,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691886672] [2020-04-17 18:42:31,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192191161] [2020-04-17 18:42:31,182 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:31,244 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:31,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:31,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:31,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:31,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:31,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:31,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909457978] [2020-04-17 18:42:31,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:31,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:31,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:31,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:31,407 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 18:42:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:31,663 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-04-17 18:42:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:31,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:31,666 INFO L225 Difference]: With dead ends: 184 [2020-04-17 18:42:31,666 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 18:42:31,666 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 18:42:31,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-04-17 18:42:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:31,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-04-17 18:42:31,671 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-04-17 18:42:31,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:31,671 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-04-17 18:42:31,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:31,672 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-04-17 18:42:31,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:31,672 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:31,673 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:31,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:31,877 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:31,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-04-17 18:42:31,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:31,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510515240] [2020-04-17 18:42:31,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:31,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510515240] [2020-04-17 18:42:31,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296346044] [2020-04-17 18:42:31,995 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:32,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:32,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:32,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:32,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:32,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936149249] [2020-04-17 18:42:32,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:32,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:32,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:32,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:32,884 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-04-17 18:42:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:33,081 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-04-17 18:42:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:33,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:33,083 INFO L225 Difference]: With dead ends: 179 [2020-04-17 18:42:33,083 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:42:33,084 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:42:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-04-17 18:42:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-04-17 18:42:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-04-17 18:42:33,087 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-04-17 18:42:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:33,087 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-04-17 18:42:33,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-04-17 18:42:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:33,088 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:33,088 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:33,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:33,291 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:33,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-04-17 18:42:33,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:33,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494010263] [2020-04-17 18:42:33,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:33,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494010263] [2020-04-17 18:42:33,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25809295] [2020-04-17 18:42:33,386 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:33,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:33,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:33,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:33,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:33,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:33,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:33,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672479267] [2020-04-17 18:42:33,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:33,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:33,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:33,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:33,529 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-04-17 18:42:33,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:33,674 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-04-17 18:42:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:33,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:33,676 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:33,676 INFO L226 Difference]: Without dead ends: 174 [2020-04-17 18:42:33,677 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-04-17 18:42:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-04-17 18:42:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:42:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-04-17 18:42:33,680 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-04-17 18:42:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:33,681 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-04-17 18:42:33,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-04-17 18:42:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:33,681 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:33,681 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:33,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:33,885 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-04-17 18:42:33,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:33,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227813166] [2020-04-17 18:42:33,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:33,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227813166] [2020-04-17 18:42:33,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618941907] [2020-04-17 18:42:33,963 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:34,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:34,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:34,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:34,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:34,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:34,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:34,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516281688] [2020-04-17 18:42:34,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:34,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:34,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:34,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:34,129 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:34,322 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 18:42:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:34,322 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:34,324 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:34,324 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:34,324 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:34,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-04-17 18:42:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:42:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-04-17 18:42:34,328 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-04-17 18:42:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:34,328 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-04-17 18:42:34,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:34,328 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-04-17 18:42:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:34,329 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:34,329 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:34,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:34,529 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-04-17 18:42:34,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:34,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866099164] [2020-04-17 18:42:34,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:34,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866099164] [2020-04-17 18:42:34,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889127436] [2020-04-17 18:42:34,611 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:34,652 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:34,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:34,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:34,653 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:34,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:34,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:34,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126587147] [2020-04-17 18:42:34,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:34,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:34,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:34,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:34,756 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-04-17 18:42:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:34,938 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 18:42:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:34,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:34,940 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:34,941 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:34,941 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-04-17 18:42:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 18:42:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-04-17 18:42:34,945 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-04-17 18:42:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:34,945 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-04-17 18:42:34,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-04-17 18:42:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:34,946 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:34,946 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:35,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:35,147 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:35,147 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-04-17 18:42:35,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:35,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506599702] [2020-04-17 18:42:35,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:35,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506599702] [2020-04-17 18:42:35,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088203000] [2020-04-17 18:42:35,263 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:35,302 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:35,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:35,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:35,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:35,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:35,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:35,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861037396] [2020-04-17 18:42:35,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:35,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:35,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:35,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:35,403 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-04-17 18:42:35,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:35,476 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-04-17 18:42:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:35,477 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:35,479 INFO L225 Difference]: With dead ends: 182 [2020-04-17 18:42:35,479 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 18:42:35,479 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:35,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 18:42:35,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-04-17 18:42:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:42:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-04-17 18:42:35,484 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-04-17 18:42:35,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:35,484 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-04-17 18:42:35,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:35,484 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-04-17 18:42:35,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:35,485 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:35,485 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:35,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:35,688 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:35,689 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-04-17 18:42:35,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:35,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980564123] [2020-04-17 18:42:35,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:35,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980564123] [2020-04-17 18:42:35,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471940400] [2020-04-17 18:42:35,792 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:35,842 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:35,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:35,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:35,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:35,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:35,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:35,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992597439] [2020-04-17 18:42:35,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:35,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:35,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:35,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:35,951 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-04-17 18:42:36,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:36,105 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-04-17 18:42:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:42:36,105 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:36,106 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:36,106 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:36,107 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-04-17 18:42:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 18:42:36,110 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 18:42:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:36,110 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 18:42:36,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:36,111 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 18:42:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:36,111 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:36,111 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:36,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:36,314 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:36,314 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-04-17 18:42:36,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:36,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135879076] [2020-04-17 18:42:36,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:36,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135879076] [2020-04-17 18:42:36,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234154316] [2020-04-17 18:42:36,400 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:36,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:36,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:41,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:41,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:41,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775861124] [2020-04-17 18:42:41,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:41,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:41,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:41,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:41,267 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 18:42:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:41,482 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-04-17 18:42:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:42:41,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:41,484 INFO L225 Difference]: With dead ends: 191 [2020-04-17 18:42:41,484 INFO L226 Difference]: Without dead ends: 189 [2020-04-17 18:42:41,484 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:41,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-04-17 18:42:41,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-04-17 18:42:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:42:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-04-17 18:42:41,488 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-04-17 18:42:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:41,488 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-04-17 18:42:41,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-04-17 18:42:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:41,488 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:41,488 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:41,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:41,692 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:41,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:41,692 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-04-17 18:42:41,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:41,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246174434] [2020-04-17 18:42:41,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:41,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246174434] [2020-04-17 18:42:41,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971856233] [2020-04-17 18:42:41,791 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:41,846 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:41,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:41,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:41,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:41,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:41,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:41,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961522899] [2020-04-17 18:42:41,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:41,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:41,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:41,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:41,985 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-04-17 18:42:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:42,202 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-04-17 18:42:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:42,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:42,204 INFO L225 Difference]: With dead ends: 187 [2020-04-17 18:42:42,204 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 18:42:42,205 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 18:42:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-04-17 18:42:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 18:42:42,208 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 18:42:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:42,209 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 18:42:42,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 18:42:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:42,209 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:42,210 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:42,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:42,413 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:42,413 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-04-17 18:42:42,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:42,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257152853] [2020-04-17 18:42:42,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:42,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257152853] [2020-04-17 18:42:42,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789011668] [2020-04-17 18:42:42,495 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:42,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:42,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:42,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:42,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:42,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:42,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:42,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754570668] [2020-04-17 18:42:42,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:42,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:42,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:42,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:42,649 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 18:42:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:42,888 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-04-17 18:42:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:42,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:42,890 INFO L225 Difference]: With dead ends: 198 [2020-04-17 18:42:42,890 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 18:42:42,891 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 18:42:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-04-17 18:42:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-04-17 18:42:42,894 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-04-17 18:42:42,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:42,895 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-04-17 18:42:42,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:42,895 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-04-17 18:42:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:42,895 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:42,895 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:43,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:43,096 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:43,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:43,097 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-04-17 18:42:43,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:43,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896582797] [2020-04-17 18:42:43,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:43,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896582797] [2020-04-17 18:42:43,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662725419] [2020-04-17 18:42:43,171 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:43,215 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:43,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:43,216 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:43,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:43,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:43,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:43,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461610059] [2020-04-17 18:42:43,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:43,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:43,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:43,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:43,688 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-04-17 18:42:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:43,942 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-04-17 18:42:43,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:43,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:43,944 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:42:43,944 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 18:42:43,944 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 18:42:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-04-17 18:42:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:42:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-04-17 18:42:43,947 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-04-17 18:42:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:43,948 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-04-17 18:42:43,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-04-17 18:42:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:43,948 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:43,949 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:44,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:44,149 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:44,150 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-04-17 18:42:44,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:44,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819215934] [2020-04-17 18:42:44,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:44,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819215934] [2020-04-17 18:42:44,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308247804] [2020-04-17 18:42:44,267 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:44,305 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:44,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:44,307 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:44,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:44,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:44,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:44,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420513807] [2020-04-17 18:42:44,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:44,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:44,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:44,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:44,407 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-04-17 18:42:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:44,500 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-04-17 18:42:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:44,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:44,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:44,502 INFO L225 Difference]: With dead ends: 178 [2020-04-17 18:42:44,503 INFO L226 Difference]: Without dead ends: 176 [2020-04-17 18:42:44,503 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-04-17 18:42:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-04-17 18:42:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:42:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-04-17 18:42:44,507 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-04-17 18:42:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:44,507 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-04-17 18:42:44,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-04-17 18:42:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:44,507 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:44,507 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:44,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:44,708 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-04-17 18:42:44,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:44,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189916055] [2020-04-17 18:42:44,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:44,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189916055] [2020-04-17 18:42:44,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808880495] [2020-04-17 18:42:44,799 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:44,841 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:44,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:44,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:44,842 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:44,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:44,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:44,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391372358] [2020-04-17 18:42:44,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:44,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:44,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:44,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:44,950 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-04-17 18:42:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:45,132 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-04-17 18:42:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:45,133 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:45,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:45,134 INFO L225 Difference]: With dead ends: 193 [2020-04-17 18:42:45,135 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 18:42:45,135 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:45,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 18:42:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-04-17 18:42:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:42:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-04-17 18:42:45,138 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-04-17 18:42:45,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:45,139 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-04-17 18:42:45,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:45,139 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-04-17 18:42:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:45,139 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:45,139 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:45,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:45,340 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:45,340 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-04-17 18:42:45,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:45,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157131632] [2020-04-17 18:42:45,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:45,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157131632] [2020-04-17 18:42:45,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793413894] [2020-04-17 18:42:45,420 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:45,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:45,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:45,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:45,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:45,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190159115] [2020-04-17 18:42:45,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:45,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:45,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:45,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:45,590 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-04-17 18:42:45,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:45,829 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 18:42:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:45,829 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:45,831 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:42:45,831 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 18:42:45,831 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 18:42:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-04-17 18:42:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:42:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-04-17 18:42:45,835 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-04-17 18:42:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:45,835 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-04-17 18:42:45,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-04-17 18:42:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:45,836 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:45,836 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:46,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:46,036 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:46,037 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-04-17 18:42:46,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:46,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548163700] [2020-04-17 18:42:46,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:46,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548163700] [2020-04-17 18:42:46,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676855775] [2020-04-17 18:42:46,126 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:46,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:46,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:46,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:46,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:46,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:46,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:46,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136314104] [2020-04-17 18:42:46,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:46,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:46,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:46,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:46,335 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-04-17 18:42:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:46,457 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-04-17 18:42:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:46,457 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:46,459 INFO L225 Difference]: With dead ends: 174 [2020-04-17 18:42:46,459 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 18:42:46,459 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 18:42:46,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-04-17 18:42:46,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-04-17 18:42:46,462 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-04-17 18:42:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:46,463 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-04-17 18:42:46,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-04-17 18:42:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:46,463 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:46,463 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:46,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:46,667 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-04-17 18:42:46,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:46,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995205590] [2020-04-17 18:42:46,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:46,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995205590] [2020-04-17 18:42:46,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151434407] [2020-04-17 18:42:46,748 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:46,788 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:46,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:46,789 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:46,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:46,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:46,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:46,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043695884] [2020-04-17 18:42:46,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:46,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:46,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:46,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:46,895 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-04-17 18:42:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:47,110 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-04-17 18:42:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:47,110 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:47,112 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:42:47,112 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 18:42:47,112 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 18:42:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-04-17 18:42:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:42:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-04-17 18:42:47,116 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-04-17 18:42:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:47,116 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-04-17 18:42:47,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-04-17 18:42:47,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:47,116 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:47,116 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:47,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:47,317 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:47,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:47,318 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-04-17 18:42:47,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:47,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665066588] [2020-04-17 18:42:47,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:47,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665066588] [2020-04-17 18:42:47,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646811262] [2020-04-17 18:42:47,396 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:47,436 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:47,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:47,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:47,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:47,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:47,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:47,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569024096] [2020-04-17 18:42:47,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:47,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:47,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:47,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:47,541 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-04-17 18:42:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:47,678 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-04-17 18:42:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:47,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:47,680 INFO L225 Difference]: With dead ends: 175 [2020-04-17 18:42:47,680 INFO L226 Difference]: Without dead ends: 173 [2020-04-17 18:42:47,681 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-04-17 18:42:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-04-17 18:42:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:42:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:42:47,684 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:42:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:47,685 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:42:47,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:42:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:47,685 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:47,686 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:47,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:47,888 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:47,888 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-04-17 18:42:47,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:47,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193305069] [2020-04-17 18:42:47,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:47,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193305069] [2020-04-17 18:42:47,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334286475] [2020-04-17 18:42:47,951 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:47,993 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:47,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:47,994 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:47,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:48,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:48,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:48,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:48,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780926631] [2020-04-17 18:42:48,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:48,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:48,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:48,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:48,095 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:42:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:48,405 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-04-17 18:42:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:48,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:48,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:48,407 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:42:48,407 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 18:42:48,408 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:42:48,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 18:42:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-04-17 18:42:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:42:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 18:42:48,411 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 18:42:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:48,411 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 18:42:48,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 18:42:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:48,412 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:48,412 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:48,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:48,613 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-04-17 18:42:48,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:48,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585909450] [2020-04-17 18:42:48,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:48,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585909450] [2020-04-17 18:42:48,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756704780] [2020-04-17 18:42:48,674 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:48,713 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:48,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:48,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:48,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:48,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:48,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:48,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207927823] [2020-04-17 18:42:48,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:48,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:48,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:48,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:48,822 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:49,084 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-04-17 18:42:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:42:49,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:49,086 INFO L225 Difference]: With dead ends: 187 [2020-04-17 18:42:49,086 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 18:42:49,086 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 18:42:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-04-17 18:42:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:42:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:42:49,090 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:42:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:49,090 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:42:49,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:42:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:49,091 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:49,091 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:49,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:49,295 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:49,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:49,295 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-04-17 18:42:49,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:49,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361317620] [2020-04-17 18:42:49,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:49,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361317620] [2020-04-17 18:42:49,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853209739] [2020-04-17 18:42:49,356 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:49,395 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:49,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:50,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:50,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:50,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:50,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461944519] [2020-04-17 18:42:50,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:50,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:50,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:50,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=139, Unknown=1, NotChecked=0, Total=210 [2020-04-17 18:42:50,441 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:42:51,017 WARN L192 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-04-17 18:42:51,185 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 18:42:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:51,373 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-04-17 18:42:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:51,374 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:51,375 INFO L225 Difference]: With dead ends: 212 [2020-04-17 18:42:51,375 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:42:51,375 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=250, Invalid=505, Unknown=1, NotChecked=0, Total=756 [2020-04-17 18:42:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:42:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 18:42:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:42:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:42:51,378 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:42:51,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:51,378 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:42:51,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:51,378 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:42:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:51,378 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:51,379 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:51,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:51,579 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:51,580 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-04-17 18:42:51,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:51,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906929257] [2020-04-17 18:42:51,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:51,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906929257] [2020-04-17 18:42:51,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185045333] [2020-04-17 18:42:51,659 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:51,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:51,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:51,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:51,717 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:51,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:52,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:52,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:42:52,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580544659] [2020-04-17 18:42:52,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:42:52,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:52,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:42:52,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 18:42:52,335 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 16 states. [2020-04-17 18:42:52,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:52,645 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 18:42:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:52,646 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:42:52,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:52,647 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:42:52,648 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 18:42:52,648 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=441, Unknown=1, NotChecked=0, Total=650 [2020-04-17 18:42:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 18:42:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-04-17 18:42:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:42:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-04-17 18:42:52,651 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-04-17 18:42:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:52,652 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-04-17 18:42:52,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:42:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-04-17 18:42:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:52,652 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:52,652 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:52,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:52,853 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:52,853 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-04-17 18:42:52,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:52,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115839554] [2020-04-17 18:42:52,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:52,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115839554] [2020-04-17 18:42:52,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459779266] [2020-04-17 18:42:52,920 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:52,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:52,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:52,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:52,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:53,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:53,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:53,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979526104] [2020-04-17 18:42:53,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:53,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:53,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:53,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:53,077 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-04-17 18:42:53,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:53,346 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-04-17 18:42:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:53,346 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:53,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:53,348 INFO L225 Difference]: With dead ends: 198 [2020-04-17 18:42:53,348 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 18:42:53,349 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:53,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 18:42:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-04-17 18:42:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:42:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 18:42:53,353 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 18:42:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:53,355 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 18:42:53,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 18:42:53,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:53,355 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:53,355 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:53,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:53,556 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:53,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-04-17 18:42:53,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:53,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476018766] [2020-04-17 18:42:53,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:53,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476018766] [2020-04-17 18:42:53,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33566461] [2020-04-17 18:42:53,628 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:53,676 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:53,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:53,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:53,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:55,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:55,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:55,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224103940] [2020-04-17 18:42:55,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:55,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:55,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:55,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:55,927 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:56,316 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-04-17 18:42:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:42:56,317 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:56,318 INFO L225 Difference]: With dead ends: 209 [2020-04-17 18:42:56,319 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:42:56,319 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:42:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:42:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 18:42:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:42:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:42:56,322 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:42:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:56,322 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:42:56,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:42:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:56,323 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:56,323 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:56,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:56,524 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:56,525 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-04-17 18:42:56,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:56,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811985296] [2020-04-17 18:42:56,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:56,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811985296] [2020-04-17 18:42:56,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433992252] [2020-04-17 18:42:56,592 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:56,635 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:56,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:56,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:56,637 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:56,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:56,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:56,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:56,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126521560] [2020-04-17 18:42:56,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:56,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:56,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:56,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:56,821 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:42:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:57,445 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-04-17 18:42:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:42:57,446 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:57,447 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:42:57,448 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 18:42:57,448 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:42:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 18:42:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-04-17 18:42:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 18:42:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-04-17 18:42:57,452 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-04-17 18:42:57,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:57,453 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-04-17 18:42:57,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-04-17 18:42:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:57,453 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:57,453 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:57,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:57,657 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-04-17 18:42:57,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:57,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472971242] [2020-04-17 18:42:57,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:57,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472971242] [2020-04-17 18:42:57,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620573625] [2020-04-17 18:42:57,723 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:57,766 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:57,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:57,767 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:57,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:57,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:57,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:57,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:57,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731810188] [2020-04-17 18:42:57,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:57,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:57,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:57,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:57,898 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-04-17 18:42:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:58,475 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-04-17 18:42:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:42:58,475 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:58,477 INFO L225 Difference]: With dead ends: 236 [2020-04-17 18:42:58,477 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 18:42:58,477 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:42:58,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 18:42:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-04-17 18:42:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:42:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-04-17 18:42:58,481 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-04-17 18:42:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:58,481 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-04-17 18:42:58,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-04-17 18:42:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:58,482 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:58,482 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:58,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:58,686 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:58,686 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-04-17 18:42:58,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:58,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029509587] [2020-04-17 18:42:58,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:58,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029509587] [2020-04-17 18:42:58,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662539195] [2020-04-17 18:42:58,769 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:58,810 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:58,811 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:58,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:58,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:58,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:58,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144422997] [2020-04-17 18:42:58,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:58,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:58,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:58,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:58,927 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-04-17 18:42:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:59,395 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-04-17 18:42:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:42:59,396 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:59,397 INFO L225 Difference]: With dead ends: 219 [2020-04-17 18:42:59,397 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 18:42:59,397 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:42:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 18:42:59,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-04-17 18:42:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:42:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-04-17 18:42:59,401 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-04-17 18:42:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:59,401 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-04-17 18:42:59,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-04-17 18:42:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:59,401 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:59,401 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:59,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:59,602 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:59,603 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-04-17 18:42:59,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:59,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377022602] [2020-04-17 18:42:59,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:59,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377022602] [2020-04-17 18:42:59,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752309961] [2020-04-17 18:42:59,665 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:59,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:59,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:59,707 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:59,707 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:59,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:59,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:59,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761972169] [2020-04-17 18:42:59,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:59,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:59,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:59,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:59,822 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-04-17 18:43:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:00,060 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-04-17 18:43:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:00,061 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:00,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:00,061 INFO L225 Difference]: With dead ends: 197 [2020-04-17 18:43:00,061 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 18:43:00,062 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 18:43:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-04-17 18:43:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-04-17 18:43:00,065 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-04-17 18:43:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:00,065 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-04-17 18:43:00,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-04-17 18:43:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:00,066 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:00,066 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:00,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:00,269 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:00,270 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-04-17 18:43:00,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:00,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466304011] [2020-04-17 18:43:00,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:00,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466304011] [2020-04-17 18:43:00,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99311211] [2020-04-17 18:43:00,334 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:00,370 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:00,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:00,371 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:00,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:00,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:00,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:00,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617502120] [2020-04-17 18:43:00,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:00,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:00,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:00,469 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-04-17 18:43:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:00,715 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-04-17 18:43:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:00,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:00,717 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:43:00,717 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 18:43:00,717 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 18:43:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-04-17 18:43:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-04-17 18:43:00,720 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-04-17 18:43:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:00,721 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-04-17 18:43:00,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-04-17 18:43:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:00,721 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:00,721 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:00,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:00,922 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:00,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:00,923 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-04-17 18:43:00,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:00,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071625395] [2020-04-17 18:43:00,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:00,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071625395] [2020-04-17 18:43:00,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273035567] [2020-04-17 18:43:00,988 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:01,028 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:01,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:01,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:01,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:01,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:01,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:01,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243286888] [2020-04-17 18:43:01,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:01,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:01,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:01,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:01,529 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-04-17 18:43:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:01,786 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-04-17 18:43:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:01,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:01,787 INFO L225 Difference]: With dead ends: 197 [2020-04-17 18:43:01,787 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 18:43:01,787 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 18:43:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-04-17 18:43:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-04-17 18:43:01,791 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-04-17 18:43:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:01,791 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-04-17 18:43:01,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-04-17 18:43:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:01,792 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:01,792 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:01,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:01,993 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:01,993 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-04-17 18:43:01,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:01,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131067281] [2020-04-17 18:43:01,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131067281] [2020-04-17 18:43:02,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258257697] [2020-04-17 18:43:02,055 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:02,094 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:02,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:02,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:02,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:02,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:02,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877171098] [2020-04-17 18:43:02,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:02,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:02,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:02,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:02,208 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-04-17 18:43:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:02,576 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-04-17 18:43:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:43:02,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:02,578 INFO L225 Difference]: With dead ends: 214 [2020-04-17 18:43:02,578 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 18:43:02,578 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 18:43:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-04-17 18:43:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-04-17 18:43:02,582 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-04-17 18:43:02,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:02,582 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-04-17 18:43:02,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-04-17 18:43:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:02,583 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:02,583 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:02,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:02,783 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:02,784 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-04-17 18:43:02,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:02,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337407578] [2020-04-17 18:43:02,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337407578] [2020-04-17 18:43:02,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922428106] [2020-04-17 18:43:02,845 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:02,883 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:02,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:02,884 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:02,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:02,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:02,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113006851] [2020-04-17 18:43:02,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:02,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:02,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:02,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:02,976 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-04-17 18:43:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:03,327 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-04-17 18:43:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:03,327 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:03,328 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:43:03,328 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 18:43:03,329 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:43:03,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 18:43:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-04-17 18:43:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 18:43:03,332 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 18:43:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:03,332 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 18:43:03,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 18:43:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:03,333 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:03,333 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:03,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:03,535 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-04-17 18:43:03,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:03,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875805183] [2020-04-17 18:43:03,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:03,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875805183] [2020-04-17 18:43:03,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445358092] [2020-04-17 18:43:03,600 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:03,640 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:03,641 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:03,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:03,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:03,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778957336] [2020-04-17 18:43:03,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:03,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:03,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:03,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:03,741 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:04,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:04,100 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-04-17 18:43:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:04,100 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:04,101 INFO L225 Difference]: With dead ends: 211 [2020-04-17 18:43:04,101 INFO L226 Difference]: Without dead ends: 209 [2020-04-17 18:43:04,102 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-04-17 18:43:04,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-04-17 18:43:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:04,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:04,106 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:04,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:04,106 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:04,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:04,107 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:04,107 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:04,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:04,310 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-04-17 18:43:04,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:04,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078592940] [2020-04-17 18:43:04,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:04,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078592940] [2020-04-17 18:43:04,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916568839] [2020-04-17 18:43:04,371 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:04,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:04,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:04,412 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:04,412 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:04,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:04,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:04,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:04,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340506974] [2020-04-17 18:43:04,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:04,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:04,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:04,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:04,500 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:04,945 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-04-17 18:43:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:04,945 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:04,946 INFO L225 Difference]: With dead ends: 211 [2020-04-17 18:43:04,946 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 18:43:04,946 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:43:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 18:43:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-04-17 18:43:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:04,949 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:04,949 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:04,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:04,950 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:04,950 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:05,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:05,151 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:05,151 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-04-17 18:43:05,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:05,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623406690] [2020-04-17 18:43:05,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:05,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623406690] [2020-04-17 18:43:05,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165727474] [2020-04-17 18:43:05,212 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:05,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:05,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:05,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:05,255 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:05,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:05,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:05,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:05,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787977732] [2020-04-17 18:43:05,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:05,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:05,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:05,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:05,358 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:05,840 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-04-17 18:43:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:43:05,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:05,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:05,842 INFO L225 Difference]: With dead ends: 227 [2020-04-17 18:43:05,842 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 18:43:05,842 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:43:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 18:43:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-04-17 18:43:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 18:43:05,845 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 18:43:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:05,846 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 18:43:05,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 18:43:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:05,847 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:05,847 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:06,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:06,050 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:06,051 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-04-17 18:43:06,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:06,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353525947] [2020-04-17 18:43:06,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:06,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353525947] [2020-04-17 18:43:06,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871263197] [2020-04-17 18:43:06,110 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:06,151 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:06,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:06,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:06,153 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:06,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:06,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:06,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471017541] [2020-04-17 18:43:06,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:06,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:06,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:06,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:06,253 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:06,654 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-04-17 18:43:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:43:06,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:06,655 INFO L225 Difference]: With dead ends: 221 [2020-04-17 18:43:06,655 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 18:43:06,656 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 18:43:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-04-17 18:43:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:06,659 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:06,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:06,659 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:06,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:06,659 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:06,659 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:06,659 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:06,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:06,860 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:06,861 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-04-17 18:43:06,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:06,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924950963] [2020-04-17 18:43:06,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:06,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924950963] [2020-04-17 18:43:06,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735923044] [2020-04-17 18:43:06,945 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:06,988 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:06,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:06,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:06,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:07,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:07,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:07,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:07,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126771426] [2020-04-17 18:43:07,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:07,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:07,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:07,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:07,080 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:07,583 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-04-17 18:43:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:07,583 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:07,584 INFO L225 Difference]: With dead ends: 240 [2020-04-17 18:43:07,584 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 18:43:07,585 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 18:43:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-04-17 18:43:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 18:43:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-04-17 18:43:07,589 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-04-17 18:43:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:07,589 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-04-17 18:43:07,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-04-17 18:43:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:07,589 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:07,589 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:07,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:07,790 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:07,791 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-04-17 18:43:07,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:07,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955038515] [2020-04-17 18:43:07,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:07,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955038515] [2020-04-17 18:43:07,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040509003] [2020-04-17 18:43:07,853 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:07,896 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:07,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:07,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:07,898 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:07,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:07,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:07,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:07,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135145670] [2020-04-17 18:43:07,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:07,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:07,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:07,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:07,974 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-04-17 18:43:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:08,520 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-04-17 18:43:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:08,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:08,522 INFO L225 Difference]: With dead ends: 238 [2020-04-17 18:43:08,522 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 18:43:08,522 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 18:43:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-04-17 18:43:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 18:43:08,526 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 18:43:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:08,526 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 18:43:08,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 18:43:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:08,526 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:08,527 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:08,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:08,729 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:08,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:08,730 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-04-17 18:43:08,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:08,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371591191] [2020-04-17 18:43:08,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:08,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371591191] [2020-04-17 18:43:08,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456801906] [2020-04-17 18:43:08,801 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:08,841 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:08,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:09,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:09,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:09,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627689763] [2020-04-17 18:43:09,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:09,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:09,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:09,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:09,300 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 18:43:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:09,533 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-04-17 18:43:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:09,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:09,534 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:43:09,534 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 18:43:09,535 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 18:43:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-04-17 18:43:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 18:43:09,538 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 18:43:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:09,538 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 18:43:09,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 18:43:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:09,539 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:09,539 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:09,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:09,740 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-04-17 18:43:09,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:09,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780056032] [2020-04-17 18:43:09,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:09,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780056032] [2020-04-17 18:43:09,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623880202] [2020-04-17 18:43:09,814 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:09,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:09,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:09,857 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:09,858 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:09,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:09,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:09,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515942898] [2020-04-17 18:43:09,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:09,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:09,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:09,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:09,966 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 18:43:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:10,377 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-04-17 18:43:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:10,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:10,378 INFO L225 Difference]: With dead ends: 206 [2020-04-17 18:43:10,378 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 18:43:10,379 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:10,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 18:43:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-04-17 18:43:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-04-17 18:43:10,382 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-04-17 18:43:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:10,383 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-04-17 18:43:10,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-04-17 18:43:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:10,383 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:10,383 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:10,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:10,584 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:10,584 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-04-17 18:43:10,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:10,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068175003] [2020-04-17 18:43:10,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:10,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068175003] [2020-04-17 18:43:10,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074298381] [2020-04-17 18:43:10,653 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:10,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:10,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:10,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:10,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:10,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:10,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:10,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:10,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310403929] [2020-04-17 18:43:10,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:10,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:10,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:10,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:10,811 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 15 states. [2020-04-17 18:43:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:11,452 INFO L93 Difference]: Finished difference Result 234 states and 557 transitions. [2020-04-17 18:43:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:11,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:11,454 INFO L225 Difference]: With dead ends: 234 [2020-04-17 18:43:11,454 INFO L226 Difference]: Without dead ends: 229 [2020-04-17 18:43:11,454 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:11,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-04-17 18:43:11,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 139. [2020-04-17 18:43:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:43:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-04-17 18:43:11,458 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-04-17 18:43:11,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:11,458 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-04-17 18:43:11,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-04-17 18:43:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:11,458 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:11,458 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:11,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:11,659 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:11,660 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-04-17 18:43:11,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:11,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803783884] [2020-04-17 18:43:11,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:11,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803783884] [2020-04-17 18:43:11,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493940075] [2020-04-17 18:43:11,725 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:11,769 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:11,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:11,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:11,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:11,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:11,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:11,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177389387] [2020-04-17 18:43:11,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:11,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:11,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:11,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:11,897 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-04-17 18:43:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:12,083 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 18:43:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:12,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:12,085 INFO L225 Difference]: With dead ends: 194 [2020-04-17 18:43:12,085 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 18:43:12,085 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:43:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 18:43:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-04-17 18:43:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-04-17 18:43:12,089 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-04-17 18:43:12,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:12,089 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-04-17 18:43:12,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-04-17 18:43:12,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:12,090 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:12,090 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:12,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:12,293 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:12,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:12,294 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-04-17 18:43:12,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:12,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504922095] [2020-04-17 18:43:12,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:12,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504922095] [2020-04-17 18:43:12,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171001511] [2020-04-17 18:43:12,362 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:12,401 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:12,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:12,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:12,402 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:13,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:13,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999360648] [2020-04-17 18:43:13,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:13,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:13,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:13,042 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-04-17 18:43:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:13,289 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-04-17 18:43:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:13,289 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:13,290 INFO L225 Difference]: With dead ends: 205 [2020-04-17 18:43:13,290 INFO L226 Difference]: Without dead ends: 203 [2020-04-17 18:43:13,291 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-04-17 18:43:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-04-17 18:43:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-04-17 18:43:13,294 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-04-17 18:43:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:13,294 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-04-17 18:43:13,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-04-17 18:43:13,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:13,295 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:13,295 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:13,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:13,496 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:13,496 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-04-17 18:43:13,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:13,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423520260] [2020-04-17 18:43:13,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423520260] [2020-04-17 18:43:13,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976829515] [2020-04-17 18:43:13,565 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:13,605 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:13,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:13,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:13,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:13,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:13,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009793009] [2020-04-17 18:43:13,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:13,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:13,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:13,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:13,723 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-04-17 18:43:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:13,936 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 18:43:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:13,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:13,938 INFO L225 Difference]: With dead ends: 201 [2020-04-17 18:43:13,938 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 18:43:13,938 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 18:43:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-04-17 18:43:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 18:43:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-04-17 18:43:13,941 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-04-17 18:43:13,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:13,942 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-04-17 18:43:13,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-04-17 18:43:13,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:13,942 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:13,942 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:14,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:14,143 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:14,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:14,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-04-17 18:43:14,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:14,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572877553] [2020-04-17 18:43:14,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:14,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572877553] [2020-04-17 18:43:14,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023186875] [2020-04-17 18:43:14,203 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:14,243 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:14,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:14,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:14,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:14,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383736872] [2020-04-17 18:43:14,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:14,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:14,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:14,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:14,339 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-04-17 18:43:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:14,530 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 18:43:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:14,531 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:14,532 INFO L225 Difference]: With dead ends: 194 [2020-04-17 18:43:14,532 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 18:43:14,532 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:43:14,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 18:43:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-04-17 18:43:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-04-17 18:43:14,535 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-04-17 18:43:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:14,535 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-04-17 18:43:14,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-04-17 18:43:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:14,536 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:14,536 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:14,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:14,737 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:14,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:14,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-04-17 18:43:14,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:14,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217196361] [2020-04-17 18:43:14,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:14,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217196361] [2020-04-17 18:43:14,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536067092] [2020-04-17 18:43:14,800 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:14,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:14,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:14,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:14,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:15,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:15,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:15,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950429326] [2020-04-17 18:43:15,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:15,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:15,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:15,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:15,403 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-04-17 18:43:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:15,689 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-04-17 18:43:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:15,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:15,690 INFO L225 Difference]: With dead ends: 209 [2020-04-17 18:43:15,690 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:43:15,691 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:43:15,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:43:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-04-17 18:43:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-04-17 18:43:15,695 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-04-17 18:43:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:15,695 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-04-17 18:43:15,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-04-17 18:43:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:15,696 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:15,696 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:15,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:15,896 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:15,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:15,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-04-17 18:43:15,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:15,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515856860] [2020-04-17 18:43:15,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:15,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515856860] [2020-04-17 18:43:15,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975630823] [2020-04-17 18:43:15,958 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:15,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:15,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:15,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:16,000 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:16,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:16,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:16,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786362650] [2020-04-17 18:43:16,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:16,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:16,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:16,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:16,103 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-04-17 18:43:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:16,371 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-04-17 18:43:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:16,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:16,373 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:43:16,373 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 18:43:16,373 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 18:43:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-04-17 18:43:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:43:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 18:43:16,376 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 18:43:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:16,376 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 18:43:16,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 18:43:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:16,377 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:16,377 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:16,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:16,578 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:16,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:16,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-04-17 18:43:16,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:16,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521724058] [2020-04-17 18:43:16,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:16,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521724058] [2020-04-17 18:43:16,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586477602] [2020-04-17 18:43:16,641 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:16,682 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:16,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:16,683 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:16,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:16,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:16,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:16,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478135283] [2020-04-17 18:43:16,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:16,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:16,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:16,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:16,791 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-04-17 18:43:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:17,047 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 18:43:17,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:43:17,047 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:17,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:17,048 INFO L225 Difference]: With dead ends: 201 [2020-04-17 18:43:17,048 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 18:43:17,048 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 18:43:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-04-17 18:43:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-04-17 18:43:17,051 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-04-17 18:43:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:17,051 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-04-17 18:43:17,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-04-17 18:43:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:17,051 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:17,051 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:17,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:17,252 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:17,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-04-17 18:43:17,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:17,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707833277] [2020-04-17 18:43:17,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:17,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707833277] [2020-04-17 18:43:17,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847408655] [2020-04-17 18:43:17,320 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:17,359 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:17,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:17,360 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:17,361 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:17,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:17,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:17,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776772096] [2020-04-17 18:43:17,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:17,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:17,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:17,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:17,471 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-04-17 18:43:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:17,838 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-04-17 18:43:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:43:17,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:17,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:17,840 INFO L225 Difference]: With dead ends: 215 [2020-04-17 18:43:17,840 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 18:43:17,840 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:17,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 18:43:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-04-17 18:43:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 18:43:17,845 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 18:43:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:17,845 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 18:43:17,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 18:43:17,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:17,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:17,846 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:18,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:18,048 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:18,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:18,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-04-17 18:43:18,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:18,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200249156] [2020-04-17 18:43:18,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:18,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200249156] [2020-04-17 18:43:18,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440090417] [2020-04-17 18:43:18,114 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:18,155 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:18,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:18,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:18,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:18,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:18,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:18,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566516932] [2020-04-17 18:43:18,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:18,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:18,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:18,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:18,254 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 18:43:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:18,566 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-04-17 18:43:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:43:18,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:18,568 INFO L225 Difference]: With dead ends: 196 [2020-04-17 18:43:18,568 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 18:43:18,569 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:43:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 18:43:18,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-04-17 18:43:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:18,573 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:18,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:18,573 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:18,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:18,574 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:18,574 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:18,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:18,776 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:18,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:18,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-04-17 18:43:18,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:18,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865768048] [2020-04-17 18:43:18,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:18,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865768048] [2020-04-17 18:43:18,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148547890] [2020-04-17 18:43:18,844 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:18,884 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:18,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:18,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:18,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:18,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:18,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544817725] [2020-04-17 18:43:18,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:18,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:18,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:18,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:18,969 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:19,249 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-04-17 18:43:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:19,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:19,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:19,250 INFO L225 Difference]: With dead ends: 191 [2020-04-17 18:43:19,251 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 18:43:19,251 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:19,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 18:43:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-04-17 18:43:19,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:19,255 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:19,255 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:19,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:19,256 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:19,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:19,256 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:19,256 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:19,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:19,459 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:19,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-04-17 18:43:19,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:19,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142715081] [2020-04-17 18:43:19,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:19,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142715081] [2020-04-17 18:43:19,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999525146] [2020-04-17 18:43:19,521 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:19,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:19,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:19,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:19,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:19,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:19,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:19,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:19,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871191713] [2020-04-17 18:43:19,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:19,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:19,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:19,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:19,664 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:20,091 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-04-17 18:43:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:20,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:20,093 INFO L225 Difference]: With dead ends: 232 [2020-04-17 18:43:20,093 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 18:43:20,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:20,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 18:43:20,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-04-17 18:43:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 18:43:20,097 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 18:43:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:20,097 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 18:43:20,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 18:43:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:20,097 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:20,097 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:20,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:20,298 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-04-17 18:43:20,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:20,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617032307] [2020-04-17 18:43:20,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:20,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617032307] [2020-04-17 18:43:20,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259726122] [2020-04-17 18:43:20,381 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:20,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:20,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:20,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:20,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:20,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:20,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:20,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784559550] [2020-04-17 18:43:20,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:20,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:20,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:20,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:20,538 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 18:43:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:20,964 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-04-17 18:43:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:43:20,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:20,965 INFO L225 Difference]: With dead ends: 222 [2020-04-17 18:43:20,965 INFO L226 Difference]: Without dead ends: 220 [2020-04-17 18:43:20,966 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:20,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-04-17 18:43:20,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-04-17 18:43:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:20,969 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:20,969 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:20,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:20,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:20,969 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:20,969 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:21,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:21,170 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-04-17 18:43:21,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:21,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332733678] [2020-04-17 18:43:21,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:21,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332733678] [2020-04-17 18:43:21,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261671373] [2020-04-17 18:43:21,228 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:21,270 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:21,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:21,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:21,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:21,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:21,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:21,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:21,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808306736] [2020-04-17 18:43:21,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:21,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:21,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:21,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:21,381 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:21,915 WARN L192 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-04-17 18:43:22,483 WARN L192 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-04-17 18:43:23,372 WARN L192 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-04-17 18:43:24,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:24,271 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-04-17 18:43:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:24,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:24,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:24,273 INFO L225 Difference]: With dead ends: 254 [2020-04-17 18:43:24,273 INFO L226 Difference]: Without dead ends: 246 [2020-04-17 18:43:24,273 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:24,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-17 18:43:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-04-17 18:43:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 18:43:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-04-17 18:43:24,277 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-04-17 18:43:24,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:24,277 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-04-17 18:43:24,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:24,277 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-04-17 18:43:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:24,278 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:24,278 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:24,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:24,481 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-04-17 18:43:24,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:24,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777656203] [2020-04-17 18:43:24,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:24,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777656203] [2020-04-17 18:43:24,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233568741] [2020-04-17 18:43:24,546 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:24,587 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:24,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:24,588 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:24,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:24,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:25,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:25,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:43:25,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641341596] [2020-04-17 18:43:25,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:25,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:25,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:25,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 18:43:25,065 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 16 states. [2020-04-17 18:43:25,969 WARN L192 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-17 18:43:33,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:33,886 INFO L93 Difference]: Finished difference Result 251 states and 594 transitions. [2020-04-17 18:43:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:43:33,886 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:43:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:33,887 INFO L225 Difference]: With dead ends: 251 [2020-04-17 18:43:33,887 INFO L226 Difference]: Without dead ends: 242 [2020-04-17 18:43:33,887 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=415, Invalid=987, Unknown=4, NotChecked=0, Total=1406 [2020-04-17 18:43:33,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-04-17 18:43:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 139. [2020-04-17 18:43:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:43:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-04-17 18:43:33,890 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-04-17 18:43:33,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:33,891 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-04-17 18:43:33,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:43:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-04-17 18:43:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:33,891 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:33,891 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:34,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:34,095 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:34,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-04-17 18:43:34,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:34,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233782552] [2020-04-17 18:43:34,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:34,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233782552] [2020-04-17 18:43:34,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727030720] [2020-04-17 18:43:34,166 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:34,207 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:34,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:34,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:34,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:34,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:34,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:34,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892186124] [2020-04-17 18:43:34,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:34,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:34,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:34,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:34,320 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-04-17 18:43:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:34,655 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-04-17 18:43:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:34,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:34,656 INFO L225 Difference]: With dead ends: 208 [2020-04-17 18:43:34,657 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 18:43:34,657 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:43:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 18:43:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-04-17 18:43:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:43:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-04-17 18:43:34,660 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-04-17 18:43:34,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:34,660 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-04-17 18:43:34,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-04-17 18:43:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:34,661 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:34,661 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:34,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:34,862 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:34,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:34,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-04-17 18:43:34,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:34,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788756971] [2020-04-17 18:43:34,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:34,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788756971] [2020-04-17 18:43:34,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997002541] [2020-04-17 18:43:34,923 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:34,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:34,966 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:35,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:35,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:35,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060052247] [2020-04-17 18:43:35,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:35,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:35,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:35,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:35,049 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-04-17 18:43:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:35,455 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-04-17 18:43:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:35,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:35,456 INFO L225 Difference]: With dead ends: 215 [2020-04-17 18:43:35,456 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 18:43:35,457 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:43:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 18:43:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-04-17 18:43:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 18:43:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 18:43:35,460 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 18:43:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:35,460 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 18:43:35,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 18:43:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:35,461 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:35,461 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:35,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:35,661 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:35,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-04-17 18:43:35,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:35,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361384236] [2020-04-17 18:43:35,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:35,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361384236] [2020-04-17 18:43:35,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220735788] [2020-04-17 18:43:35,725 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:35,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:35,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:35,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:35,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:35,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:35,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:35,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:35,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036792847] [2020-04-17 18:43:35,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:35,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:35,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:35,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:35,848 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 18:43:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:36,311 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-04-17 18:43:36,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:36,311 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:36,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:36,312 INFO L225 Difference]: With dead ends: 236 [2020-04-17 18:43:36,313 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 18:43:36,313 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 18:43:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-04-17 18:43:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 18:43:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 18:43:36,316 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 18:43:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:36,317 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 18:43:36,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 18:43:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:36,317 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:36,317 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:36,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:36,518 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:36,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:36,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-04-17 18:43:36,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:36,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134665473] [2020-04-17 18:43:36,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:36,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134665473] [2020-04-17 18:43:36,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620222243] [2020-04-17 18:43:36,595 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:36,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:36,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:36,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:36,636 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:36,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:36,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:36,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:36,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656872675] [2020-04-17 18:43:36,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:36,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:36,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:36,712 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 18:43:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:37,207 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-04-17 18:43:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:37,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:37,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:37,208 INFO L225 Difference]: With dead ends: 241 [2020-04-17 18:43:37,208 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 18:43:37,209 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 18:43:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-04-17 18:43:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-04-17 18:43:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-04-17 18:43:37,212 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-04-17 18:43:37,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:37,212 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-04-17 18:43:37,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-04-17 18:43:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:37,212 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:37,212 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:37,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:37,413 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:37,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:37,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-04-17 18:43:37,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:37,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435630456] [2020-04-17 18:43:37,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:37,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435630456] [2020-04-17 18:43:37,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204017424] [2020-04-17 18:43:37,484 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:37,545 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:37,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:37,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:37,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:37,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:37,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:37,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:37,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012824898] [2020-04-17 18:43:37,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:37,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:37,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:37,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:37,671 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-04-17 18:43:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:38,179 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-04-17 18:43:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:43:38,179 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:38,180 INFO L225 Difference]: With dead ends: 232 [2020-04-17 18:43:38,181 INFO L226 Difference]: Without dead ends: 224 [2020-04-17 18:43:38,181 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:43:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-04-17 18:43:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-04-17 18:43:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 18:43:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-04-17 18:43:38,185 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-04-17 18:43:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:38,185 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-04-17 18:43:38,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-04-17 18:43:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:38,186 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:38,186 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:38,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:38,386 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:38,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:38,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-04-17 18:43:38,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:38,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845582440] [2020-04-17 18:43:38,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 18:43:38,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845582440] [2020-04-17 18:43:38,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253436790] [2020-04-17 18:43:38,446 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:38,493 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:43:38,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:38,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:38,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:38,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:38,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:38,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 13 [2020-04-17 18:43:38,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799005790] [2020-04-17 18:43:38,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:38,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:38,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:38,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:38,621 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 15 states. [2020-04-17 18:43:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:38,997 INFO L93 Difference]: Finished difference Result 155 states and 365 transitions. [2020-04-17 18:43:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:38,998 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:38,998 INFO L225 Difference]: With dead ends: 155 [2020-04-17 18:43:38,998 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 18:43:38,999 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:43:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 18:43:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 117. [2020-04-17 18:43:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 18:43:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2020-04-17 18:43:39,001 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 13 [2020-04-17 18:43:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:39,002 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2020-04-17 18:43:39,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2020-04-17 18:43:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:39,002 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:39,002 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:39,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:39,203 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:39,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-04-17 18:43:39,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:39,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093686612] [2020-04-17 18:43:39,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 18:43:39,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093686612] [2020-04-17 18:43:39,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850714441] [2020-04-17 18:43:39,282 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:39,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:43:39,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:39,323 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:43:39,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:39,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 18:43:39,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2020-04-17 18:43:39,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283956877] [2020-04-17 18:43:39,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:43:39,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:39,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:43:39,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:43:39,365 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 8 states. [2020-04-17 18:43:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:39,386 INFO L93 Difference]: Finished difference Result 190 states and 483 transitions. [2020-04-17 18:43:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:43:39,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-04-17 18:43:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:39,387 INFO L225 Difference]: With dead ends: 190 [2020-04-17 18:43:39,388 INFO L226 Difference]: Without dead ends: 178 [2020-04-17 18:43:39,388 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:43:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-04-17 18:43:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-04-17 18:43:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-04-17 18:43:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 454 transitions. [2020-04-17 18:43:39,392 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 454 transitions. Word has length 13 [2020-04-17 18:43:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:39,392 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 454 transitions. [2020-04-17 18:43:39,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:43:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 454 transitions. [2020-04-17 18:43:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:43:39,392 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:39,392 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:39,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:39,593 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-04-17 18:43:39,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:39,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095773656] [2020-04-17 18:43:39,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:39,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095773656] [2020-04-17 18:43:39,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799859503] [2020-04-17 18:43:39,678 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:39,717 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:39,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:39,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:39,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:39,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:39,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:39,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065918020] [2020-04-17 18:43:39,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:39,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:39,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:39,842 INFO L87 Difference]: Start difference. First operand 178 states and 454 transitions. Second operand 17 states. [2020-04-17 18:43:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:39,904 INFO L93 Difference]: Finished difference Result 216 states and 530 transitions. [2020-04-17 18:43:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:43:39,905 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:43:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:39,906 INFO L225 Difference]: With dead ends: 216 [2020-04-17 18:43:39,906 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 18:43:39,906 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 18:43:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 186. [2020-04-17 18:43:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-04-17 18:43:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 478 transitions. [2020-04-17 18:43:39,910 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 478 transitions. Word has length 14 [2020-04-17 18:43:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:39,911 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 478 transitions. [2020-04-17 18:43:39,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 478 transitions. [2020-04-17 18:43:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:43:39,911 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:39,911 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:40,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:40,114 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:40,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-04-17 18:43:40,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:40,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798079969] [2020-04-17 18:43:40,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:40,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798079969] [2020-04-17 18:43:40,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898255718] [2020-04-17 18:43:40,199 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:40,239 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:40,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:40,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:40,240 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:40,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:40,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:40,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650758941] [2020-04-17 18:43:40,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:40,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:40,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:40,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:40,363 INFO L87 Difference]: Start difference. First operand 186 states and 478 transitions. Second operand 17 states. [2020-04-17 18:43:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:40,536 INFO L93 Difference]: Finished difference Result 232 states and 562 transitions. [2020-04-17 18:43:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:43:40,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:43:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:40,537 INFO L225 Difference]: With dead ends: 232 [2020-04-17 18:43:40,537 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 18:43:40,538 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:43:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 18:43:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 184. [2020-04-17 18:43:40,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 18:43:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 18:43:40,541 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 18:43:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:40,541 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 18:43:40,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 18:43:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:43:40,542 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:40,542 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:40,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:40,743 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:40,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:40,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-04-17 18:43:40,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:40,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211440966] [2020-04-17 18:43:40,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:40,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211440966] [2020-04-17 18:43:40,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435240365] [2020-04-17 18:43:40,828 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:40,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:40,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:45,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:45,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:45,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495162918] [2020-04-17 18:43:45,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:45,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:45,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:45,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=183, Unknown=1, NotChecked=0, Total=272 [2020-04-17 18:43:45,688 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 17 states. [2020-04-17 18:43:46,112 WARN L192 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 18:43:46,638 WARN L192 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 18:43:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:46,655 INFO L93 Difference]: Finished difference Result 250 states and 600 transitions. [2020-04-17 18:43:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:43:46,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:43:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:46,656 INFO L225 Difference]: With dead ends: 250 [2020-04-17 18:43:46,657 INFO L226 Difference]: Without dead ends: 248 [2020-04-17 18:43:46,657 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=174, Invalid=331, Unknown=1, NotChecked=0, Total=506 [2020-04-17 18:43:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-04-17 18:43:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 182. [2020-04-17 18:43:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-04-17 18:43:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 466 transitions. [2020-04-17 18:43:46,660 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 466 transitions. Word has length 14 [2020-04-17 18:43:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:46,661 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 466 transitions. [2020-04-17 18:43:46,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 466 transitions. [2020-04-17 18:43:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:43:46,661 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:46,661 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:46,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:46,862 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:46,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-04-17 18:43:46,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:46,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911354460] [2020-04-17 18:43:46,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:46,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911354460] [2020-04-17 18:43:46,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825533471] [2020-04-17 18:43:46,954 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:46,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:46,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:46,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:46,996 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:49,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:49,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:49,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024638091] [2020-04-17 18:43:49,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:49,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:49,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:49,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:49,119 INFO L87 Difference]: Start difference. First operand 182 states and 466 transitions. Second operand 17 states. [2020-04-17 18:43:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:49,419 INFO L93 Difference]: Finished difference Result 248 states and 594 transitions. [2020-04-17 18:43:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:43:49,420 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:43:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:49,421 INFO L225 Difference]: With dead ends: 248 [2020-04-17 18:43:49,421 INFO L226 Difference]: Without dead ends: 246 [2020-04-17 18:43:49,424 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:43:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-17 18:43:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 184. [2020-04-17 18:43:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 18:43:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 18:43:49,428 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 18:43:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:49,428 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 18:43:49,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 18:43:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:43:49,429 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:49,429 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:49,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:49,632 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:49,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-04-17 18:43:49,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:49,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665938629] [2020-04-17 18:43:49,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:49,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665938629] [2020-04-17 18:43:49,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286281591] [2020-04-17 18:43:49,738 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:49,781 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:49,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:49,782 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:49,783 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:49,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:49,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:43:49,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173968196] [2020-04-17 18:43:49,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:43:49,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:49,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:43:49,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:43:49,973 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 17 states. [2020-04-17 18:43:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:50,240 INFO L93 Difference]: Finished difference Result 264 states and 626 transitions. [2020-04-17 18:43:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:43:50,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:43:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:50,241 INFO L225 Difference]: With dead ends: 264 [2020-04-17 18:43:50,242 INFO L226 Difference]: Without dead ends: 262 [2020-04-17 18:43:50,242 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:43:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-04-17 18:43:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 184. [2020-04-17 18:43:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 18:43:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 18:43:50,246 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 18:43:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:50,246 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 18:43:50,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:43:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 18:43:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:43:50,247 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:50,247 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:50,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:50,450 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:50,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-04-17 18:43:50,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:50,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711218978] [2020-04-17 18:43:50,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:50,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711218978] [2020-04-17 18:43:50,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449277152] [2020-04-17 18:43:50,535 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:50,577 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:50,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:50,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:43:50,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:58,997 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-17 18:43:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:58,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:58,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:43:58,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331325554] [2020-04-17 18:43:58,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:43:58,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:58,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:43:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=207, Unknown=3, NotChecked=0, Total=306 [2020-04-17 18:43:58,999 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 18 states. [2020-04-17 18:44:01,334 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 18:44:05,531 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 29 [2020-04-17 18:44:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:13,597 INFO L93 Difference]: Finished difference Result 265 states and 627 transitions. [2020-04-17 18:44:13,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:44:13,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:44:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:13,599 INFO L225 Difference]: With dead ends: 265 [2020-04-17 18:44:13,599 INFO L226 Difference]: Without dead ends: 263 [2020-04-17 18:44:13,599 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=209, Invalid=388, Unknown=3, NotChecked=0, Total=600 [2020-04-17 18:44:13,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-17 18:44:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 180. [2020-04-17 18:44:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-04-17 18:44:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 460 transitions. [2020-04-17 18:44:13,603 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 460 transitions. Word has length 14 [2020-04-17 18:44:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:13,603 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 460 transitions. [2020-04-17 18:44:13,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:44:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 460 transitions. [2020-04-17 18:44:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:13,603 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:13,603 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:13,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:13,804 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:13,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-04-17 18:44:13,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:13,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080952481] [2020-04-17 18:44:13,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:13,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080952481] [2020-04-17 18:44:13,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097634443] [2020-04-17 18:44:13,887 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:13,928 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:13,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:13,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:13,929 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:14,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:14,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:14,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285111464] [2020-04-17 18:44:14,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:14,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:14,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:14,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:14,061 INFO L87 Difference]: Start difference. First operand 180 states and 460 transitions. Second operand 17 states. [2020-04-17 18:44:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:14,318 INFO L93 Difference]: Finished difference Result 252 states and 602 transitions. [2020-04-17 18:44:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:44:14,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:14,319 INFO L225 Difference]: With dead ends: 252 [2020-04-17 18:44:14,319 INFO L226 Difference]: Without dead ends: 250 [2020-04-17 18:44:14,320 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:44:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-04-17 18:44:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 183. [2020-04-17 18:44:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-04-17 18:44:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2020-04-17 18:44:14,323 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 14 [2020-04-17 18:44:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:14,323 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2020-04-17 18:44:14,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:14,323 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2020-04-17 18:44:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:14,324 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:14,324 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:14,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:14,525 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:14,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:14,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-04-17 18:44:14,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:14,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92643021] [2020-04-17 18:44:14,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:14,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92643021] [2020-04-17 18:44:14,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355444898] [2020-04-17 18:44:14,617 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:14,659 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:44:14,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:14,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:14,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:15,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:15,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:15,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536879618] [2020-04-17 18:44:15,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:15,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:15,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:15,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:15,127 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand 17 states. [2020-04-17 18:44:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:15,422 INFO L93 Difference]: Finished difference Result 268 states and 634 transitions. [2020-04-17 18:44:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:15,422 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:15,423 INFO L225 Difference]: With dead ends: 268 [2020-04-17 18:44:15,423 INFO L226 Difference]: Without dead ends: 266 [2020-04-17 18:44:15,424 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:44:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-04-17 18:44:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 184. [2020-04-17 18:44:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 18:44:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 18:44:15,428 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 18:44:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:15,428 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 18:44:15,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 18:44:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:15,428 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:15,428 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:15,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:15,629 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:15,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-04-17 18:44:15,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:15,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570312956] [2020-04-17 18:44:15,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:15,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570312956] [2020-04-17 18:44:15,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932921926] [2020-04-17 18:44:15,718 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:15,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:15,758 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:15,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:15,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:15,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564998179] [2020-04-17 18:44:15,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:15,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:15,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:15,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:15,868 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 17 states. [2020-04-17 18:44:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:16,111 INFO L93 Difference]: Finished difference Result 267 states and 635 transitions. [2020-04-17 18:44:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:16,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:16,113 INFO L225 Difference]: With dead ends: 267 [2020-04-17 18:44:16,113 INFO L226 Difference]: Without dead ends: 265 [2020-04-17 18:44:16,114 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:44:16,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-04-17 18:44:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 183. [2020-04-17 18:44:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-04-17 18:44:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2020-04-17 18:44:16,119 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 14 [2020-04-17 18:44:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:16,119 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2020-04-17 18:44:16,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2020-04-17 18:44:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:16,120 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:16,120 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:16,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:16,323 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:16,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-04-17 18:44:16,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:16,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968376870] [2020-04-17 18:44:16,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:16,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968376870] [2020-04-17 18:44:16,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980138810] [2020-04-17 18:44:16,420 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:16,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:16,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:16,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:16,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:16,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:16,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:16,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500547211] [2020-04-17 18:44:16,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:16,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:16,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:16,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:16,629 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand 17 states. [2020-04-17 18:44:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:16,841 INFO L93 Difference]: Finished difference Result 246 states and 586 transitions. [2020-04-17 18:44:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:16,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:16,843 INFO L225 Difference]: With dead ends: 246 [2020-04-17 18:44:16,843 INFO L226 Difference]: Without dead ends: 236 [2020-04-17 18:44:16,843 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-04-17 18:44:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 180. [2020-04-17 18:44:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-04-17 18:44:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 458 transitions. [2020-04-17 18:44:16,848 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 458 transitions. Word has length 14 [2020-04-17 18:44:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:16,848 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 458 transitions. [2020-04-17 18:44:16,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 458 transitions. [2020-04-17 18:44:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:16,848 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:16,849 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:17,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:17,052 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:17,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-04-17 18:44:17,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:17,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143533607] [2020-04-17 18:44:17,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:17,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143533607] [2020-04-17 18:44:17,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932266614] [2020-04-17 18:44:17,147 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:17,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:44:17,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:17,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:17,190 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:17,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:17,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:17,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781492200] [2020-04-17 18:44:17,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:17,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:17,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:17,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:17,320 INFO L87 Difference]: Start difference. First operand 180 states and 458 transitions. Second operand 17 states. [2020-04-17 18:44:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:17,544 INFO L93 Difference]: Finished difference Result 244 states and 586 transitions. [2020-04-17 18:44:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:17,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:17,545 INFO L225 Difference]: With dead ends: 244 [2020-04-17 18:44:17,546 INFO L226 Difference]: Without dead ends: 242 [2020-04-17 18:44:17,546 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-04-17 18:44:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2020-04-17 18:44:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-04-17 18:44:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 471 transitions. [2020-04-17 18:44:17,550 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 471 transitions. Word has length 14 [2020-04-17 18:44:17,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:17,550 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 471 transitions. [2020-04-17 18:44:17,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 471 transitions. [2020-04-17 18:44:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:17,551 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:17,551 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:17,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:17,752 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:17,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-04-17 18:44:17,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:17,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451597126] [2020-04-17 18:44:17,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:17,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451597126] [2020-04-17 18:44:17,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121056888] [2020-04-17 18:44:17,845 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:17,884 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:17,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:17,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:17,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:19,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:19,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:19,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272758470] [2020-04-17 18:44:19,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:19,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:19,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:19,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:19,348 INFO L87 Difference]: Start difference. First operand 185 states and 471 transitions. Second operand 17 states. [2020-04-17 18:44:19,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:19,591 INFO L93 Difference]: Finished difference Result 257 states and 610 transitions. [2020-04-17 18:44:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:44:19,591 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:19,592 INFO L225 Difference]: With dead ends: 257 [2020-04-17 18:44:19,592 INFO L226 Difference]: Without dead ends: 255 [2020-04-17 18:44:19,593 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-04-17 18:44:19,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 184. [2020-04-17 18:44:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 18:44:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 468 transitions. [2020-04-17 18:44:19,598 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 468 transitions. Word has length 14 [2020-04-17 18:44:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:19,599 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 468 transitions. [2020-04-17 18:44:19,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:19,599 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 468 transitions. [2020-04-17 18:44:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:19,599 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:19,599 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:19,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:19,803 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:19,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:19,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-04-17 18:44:19,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:19,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498265304] [2020-04-17 18:44:19,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:19,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498265304] [2020-04-17 18:44:19,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734267980] [2020-04-17 18:44:19,897 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:19,937 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:19,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:19,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:19,938 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:29,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:29,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:29,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86030424] [2020-04-17 18:44:29,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:29,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:29,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:29,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=190, Unknown=1, NotChecked=0, Total=272 [2020-04-17 18:44:29,444 INFO L87 Difference]: Start difference. First operand 184 states and 468 transitions. Second operand 17 states. [2020-04-17 18:44:29,868 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 18:44:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:30,020 INFO L93 Difference]: Finished difference Result 273 states and 644 transitions. [2020-04-17 18:44:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:30,020 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:30,021 INFO L225 Difference]: With dead ends: 273 [2020-04-17 18:44:30,021 INFO L226 Difference]: Without dead ends: 271 [2020-04-17 18:44:30,022 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=197, Invalid=402, Unknown=1, NotChecked=0, Total=600 [2020-04-17 18:44:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-04-17 18:44:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 189. [2020-04-17 18:44:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-04-17 18:44:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 481 transitions. [2020-04-17 18:44:30,026 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 481 transitions. Word has length 14 [2020-04-17 18:44:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:30,026 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 481 transitions. [2020-04-17 18:44:30,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 481 transitions. [2020-04-17 18:44:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:30,027 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:30,027 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:30,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:30,230 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:30,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:30,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-04-17 18:44:30,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:30,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994071714] [2020-04-17 18:44:30,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:30,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994071714] [2020-04-17 18:44:30,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842561395] [2020-04-17 18:44:30,327 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:30,370 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:44:30,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:30,371 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:30,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:30,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:30,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:30,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954832738] [2020-04-17 18:44:30,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:30,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:30,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:30,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:30,489 INFO L87 Difference]: Start difference. First operand 189 states and 481 transitions. Second operand 17 states. [2020-04-17 18:44:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:30,745 INFO L93 Difference]: Finished difference Result 276 states and 647 transitions. [2020-04-17 18:44:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:30,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:30,748 INFO L225 Difference]: With dead ends: 276 [2020-04-17 18:44:30,748 INFO L226 Difference]: Without dead ends: 266 [2020-04-17 18:44:30,748 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:44:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-04-17 18:44:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 189. [2020-04-17 18:44:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-04-17 18:44:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 477 transitions. [2020-04-17 18:44:30,753 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 477 transitions. Word has length 14 [2020-04-17 18:44:30,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:30,753 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 477 transitions. [2020-04-17 18:44:30,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:30,753 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 477 transitions. [2020-04-17 18:44:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:30,754 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:30,754 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:30,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:30,957 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:30,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:30,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-04-17 18:44:30,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:30,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037635863] [2020-04-17 18:44:30,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:31,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037635863] [2020-04-17 18:44:31,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348005753] [2020-04-17 18:44:31,061 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:31,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:31,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:31,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:31,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:31,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653127871] [2020-04-17 18:44:31,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:31,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:31,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:31,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:31,229 INFO L87 Difference]: Start difference. First operand 189 states and 477 transitions. Second operand 17 states. [2020-04-17 18:44:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:31,465 INFO L93 Difference]: Finished difference Result 252 states and 602 transitions. [2020-04-17 18:44:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:31,465 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:31,466 INFO L225 Difference]: With dead ends: 252 [2020-04-17 18:44:31,466 INFO L226 Difference]: Without dead ends: 250 [2020-04-17 18:44:31,467 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-04-17 18:44:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 186. [2020-04-17 18:44:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-04-17 18:44:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 470 transitions. [2020-04-17 18:44:31,470 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 470 transitions. Word has length 14 [2020-04-17 18:44:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:31,471 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 470 transitions. [2020-04-17 18:44:31,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 470 transitions. [2020-04-17 18:44:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:31,471 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:31,471 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:31,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:31,672 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:31,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:31,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-04-17 18:44:31,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:31,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336682770] [2020-04-17 18:44:31,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:31,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336682770] [2020-04-17 18:44:31,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297084900] [2020-04-17 18:44:31,822 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:31,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:31,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:31,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:31,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:32,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:32,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:32,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018538638] [2020-04-17 18:44:32,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:32,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:32,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:32,090 INFO L87 Difference]: Start difference. First operand 186 states and 470 transitions. Second operand 17 states. [2020-04-17 18:44:32,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:32,299 INFO L93 Difference]: Finished difference Result 241 states and 575 transitions. [2020-04-17 18:44:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:44:32,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:32,300 INFO L225 Difference]: With dead ends: 241 [2020-04-17 18:44:32,300 INFO L226 Difference]: Without dead ends: 236 [2020-04-17 18:44:32,300 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:44:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-04-17 18:44:32,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 188. [2020-04-17 18:44:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 18:44:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 472 transitions. [2020-04-17 18:44:32,304 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 472 transitions. Word has length 14 [2020-04-17 18:44:32,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:32,304 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 472 transitions. [2020-04-17 18:44:32,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 472 transitions. [2020-04-17 18:44:32,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:32,305 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:32,305 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:32,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:32,509 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:32,509 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-04-17 18:44:32,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:32,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957785248] [2020-04-17 18:44:32,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:32,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957785248] [2020-04-17 18:44:32,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62846206] [2020-04-17 18:44:32,648 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:32,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:44:32,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:32,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:32,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:32,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:32,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:32,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759727964] [2020-04-17 18:44:32,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:32,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:32,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:32,854 INFO L87 Difference]: Start difference. First operand 188 states and 472 transitions. Second operand 17 states. [2020-04-17 18:44:32,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:32,924 INFO L93 Difference]: Finished difference Result 237 states and 570 transitions. [2020-04-17 18:44:32,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:44:32,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:32,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:32,926 INFO L225 Difference]: With dead ends: 237 [2020-04-17 18:44:32,926 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 18:44:32,926 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:44:32,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 18:44:32,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 196. [2020-04-17 18:44:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 18:44:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 496 transitions. [2020-04-17 18:44:32,931 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 496 transitions. Word has length 14 [2020-04-17 18:44:32,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:32,931 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 496 transitions. [2020-04-17 18:44:32,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 496 transitions. [2020-04-17 18:44:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:32,931 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:32,931 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:33,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:33,132 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-04-17 18:44:33,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:33,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125061047] [2020-04-17 18:44:33,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:33,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125061047] [2020-04-17 18:44:33,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947056111] [2020-04-17 18:44:33,245 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:33,286 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:33,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:33,287 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:33,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:33,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:33,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:33,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724641337] [2020-04-17 18:44:33,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:33,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:33,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:33,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:33,411 INFO L87 Difference]: Start difference. First operand 196 states and 496 transitions. Second operand 17 states. [2020-04-17 18:44:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:33,607 INFO L93 Difference]: Finished difference Result 249 states and 594 transitions. [2020-04-17 18:44:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:33,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:33,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:33,608 INFO L225 Difference]: With dead ends: 249 [2020-04-17 18:44:33,608 INFO L226 Difference]: Without dead ends: 247 [2020-04-17 18:44:33,608 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:44:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-04-17 18:44:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 194. [2020-04-17 18:44:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 18:44:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 18:44:33,613 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 18:44:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:33,613 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 18:44:33,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 18:44:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:33,613 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:33,613 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:33,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:33,814 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:33,815 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-04-17 18:44:33,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:33,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625033720] [2020-04-17 18:44:33,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:33,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625033720] [2020-04-17 18:44:33,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975846293] [2020-04-17 18:44:33,919 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:33,961 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:33,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:33,962 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:33,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:35,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:35,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:35,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968549768] [2020-04-17 18:44:35,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:35,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:35,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:35,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=194, Unknown=2, NotChecked=0, Total=272 [2020-04-17 18:44:35,321 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 17 states. [2020-04-17 18:44:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:35,579 INFO L93 Difference]: Finished difference Result 265 states and 628 transitions. [2020-04-17 18:44:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:35,579 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:35,580 INFO L225 Difference]: With dead ends: 265 [2020-04-17 18:44:35,580 INFO L226 Difference]: Without dead ends: 263 [2020-04-17 18:44:35,581 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=180, Invalid=370, Unknown=2, NotChecked=0, Total=552 [2020-04-17 18:44:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-17 18:44:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 192. [2020-04-17 18:44:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 18:44:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 484 transitions. [2020-04-17 18:44:35,585 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 484 transitions. Word has length 14 [2020-04-17 18:44:35,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:35,585 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 484 transitions. [2020-04-17 18:44:35,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:35,585 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 484 transitions. [2020-04-17 18:44:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:35,586 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:35,586 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:35,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:35,786 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:35,787 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-04-17 18:44:35,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:35,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710200663] [2020-04-17 18:44:35,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:35,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710200663] [2020-04-17 18:44:35,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746725331] [2020-04-17 18:44:35,877 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:35,920 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:44:35,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:35,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:35,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:37,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:37,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:44:37,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470688254] [2020-04-17 18:44:37,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:44:37,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:37,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:44:37,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=220, Unknown=2, NotChecked=0, Total=306 [2020-04-17 18:44:37,142 INFO L87 Difference]: Start difference. First operand 192 states and 484 transitions. Second operand 18 states. [2020-04-17 18:44:40,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:40,191 INFO L93 Difference]: Finished difference Result 270 states and 635 transitions. [2020-04-17 18:44:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:44:40,191 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:44:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:40,192 INFO L225 Difference]: With dead ends: 270 [2020-04-17 18:44:40,192 INFO L226 Difference]: Without dead ends: 268 [2020-04-17 18:44:40,192 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=227, Invalid=473, Unknown=2, NotChecked=0, Total=702 [2020-04-17 18:44:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-17 18:44:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 194. [2020-04-17 18:44:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 18:44:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 18:44:40,196 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 18:44:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:40,197 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 18:44:40,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:44:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 18:44:40,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:40,197 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:40,197 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:40,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:40,398 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-04-17 18:44:40,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:40,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606166998] [2020-04-17 18:44:40,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:40,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606166998] [2020-04-17 18:44:40,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515836873] [2020-04-17 18:44:40,486 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:40,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:40,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:46,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:46,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:46,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416738775] [2020-04-17 18:44:46,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:46,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:46,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:46,988 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 17 states. [2020-04-17 18:44:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:47,333 INFO L93 Difference]: Finished difference Result 282 states and 661 transitions. [2020-04-17 18:44:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:44:47,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:47,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:47,334 INFO L225 Difference]: With dead ends: 282 [2020-04-17 18:44:47,334 INFO L226 Difference]: Without dead ends: 280 [2020-04-17 18:44:47,335 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:44:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-04-17 18:44:47,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2020-04-17 18:44:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 18:44:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 18:44:47,339 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 18:44:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:47,339 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 18:44:47,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 18:44:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:47,339 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:47,340 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:47,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:47,540 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-04-17 18:44:47,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:47,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622688919] [2020-04-17 18:44:47,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:47,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622688919] [2020-04-17 18:44:47,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237337532] [2020-04-17 18:44:47,630 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:47,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:47,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:47,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:47,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:47,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:47,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:47,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533515625] [2020-04-17 18:44:47,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:47,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:47,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:47,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:47,863 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 17 states. [2020-04-17 18:44:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:48,216 INFO L93 Difference]: Finished difference Result 270 states and 637 transitions. [2020-04-17 18:44:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:44:48,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:48,218 INFO L225 Difference]: With dead ends: 270 [2020-04-17 18:44:48,218 INFO L226 Difference]: Without dead ends: 268 [2020-04-17 18:44:48,218 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:44:48,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-17 18:44:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 190. [2020-04-17 18:44:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-04-17 18:44:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 478 transitions. [2020-04-17 18:44:48,223 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 478 transitions. Word has length 14 [2020-04-17 18:44:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:48,223 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 478 transitions. [2020-04-17 18:44:48,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 478 transitions. [2020-04-17 18:44:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:48,224 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:48,224 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:48,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:48,427 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:48,427 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-04-17 18:44:48,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:48,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141210185] [2020-04-17 18:44:48,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:48,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141210185] [2020-04-17 18:44:48,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100157243] [2020-04-17 18:44:48,554 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:48,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:44:48,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:48,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:48,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:48,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:48,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:48,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783775307] [2020-04-17 18:44:48,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:48,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:48,722 INFO L87 Difference]: Start difference. First operand 190 states and 478 transitions. Second operand 17 states. [2020-04-17 18:44:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:49,063 INFO L93 Difference]: Finished difference Result 261 states and 618 transitions. [2020-04-17 18:44:49,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:44:49,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:49,064 INFO L225 Difference]: With dead ends: 261 [2020-04-17 18:44:49,064 INFO L226 Difference]: Without dead ends: 259 [2020-04-17 18:44:49,065 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:44:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-04-17 18:44:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 193. [2020-04-17 18:44:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-04-17 18:44:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 487 transitions. [2020-04-17 18:44:49,069 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 487 transitions. Word has length 14 [2020-04-17 18:44:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:49,069 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 487 transitions. [2020-04-17 18:44:49,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 487 transitions. [2020-04-17 18:44:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:49,070 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:49,070 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:49,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:49,272 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:49,272 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-04-17 18:44:49,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:49,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990981811] [2020-04-17 18:44:49,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:49,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990981811] [2020-04-17 18:44:49,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534073412] [2020-04-17 18:44:49,358 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:49,400 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:49,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:49,400 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:49,401 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:49,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:49,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:49,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153296004] [2020-04-17 18:44:49,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:49,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:49,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:49,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:49,897 INFO L87 Difference]: Start difference. First operand 193 states and 487 transitions. Second operand 17 states. [2020-04-17 18:44:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:50,246 INFO L93 Difference]: Finished difference Result 286 states and 669 transitions. [2020-04-17 18:44:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:44:50,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:50,252 INFO L225 Difference]: With dead ends: 286 [2020-04-17 18:44:50,252 INFO L226 Difference]: Without dead ends: 284 [2020-04-17 18:44:50,252 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:44:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-04-17 18:44:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 194. [2020-04-17 18:44:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 18:44:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 18:44:50,256 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 18:44:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:50,256 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 18:44:50,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 18:44:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:50,256 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:50,257 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:50,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:50,457 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:50,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:50,458 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-04-17 18:44:50,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:50,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808850414] [2020-04-17 18:44:50,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:50,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808850414] [2020-04-17 18:44:50,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725432976] [2020-04-17 18:44:50,537 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:50,579 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:50,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:50,580 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:50,581 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:50,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:50,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:50,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014714688] [2020-04-17 18:44:50,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:50,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:50,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:50,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:50,694 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 17 states. [2020-04-17 18:44:50,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:50,980 INFO L93 Difference]: Finished difference Result 288 states and 676 transitions. [2020-04-17 18:44:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:44:50,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:50,981 INFO L225 Difference]: With dead ends: 288 [2020-04-17 18:44:50,981 INFO L226 Difference]: Without dead ends: 286 [2020-04-17 18:44:50,982 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:44:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-04-17 18:44:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 193. [2020-04-17 18:44:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-04-17 18:44:50,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 487 transitions. [2020-04-17 18:44:50,985 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 487 transitions. Word has length 14 [2020-04-17 18:44:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:50,985 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 487 transitions. [2020-04-17 18:44:50,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:50,985 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 487 transitions. [2020-04-17 18:44:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:50,985 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:50,986 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:51,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:51,186 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:51,187 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-04-17 18:44:51,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:51,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357550484] [2020-04-17 18:44:51,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:51,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357550484] [2020-04-17 18:44:51,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593898869] [2020-04-17 18:44:51,281 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:51,342 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:44:51,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:51,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:51,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:51,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:51,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:51,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337079400] [2020-04-17 18:44:51,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:51,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:51,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:51,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:51,535 INFO L87 Difference]: Start difference. First operand 193 states and 487 transitions. Second operand 17 states. [2020-04-17 18:44:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:51,832 INFO L93 Difference]: Finished difference Result 254 states and 600 transitions. [2020-04-17 18:44:51,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:44:51,832 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:51,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:51,833 INFO L225 Difference]: With dead ends: 254 [2020-04-17 18:44:51,833 INFO L226 Difference]: Without dead ends: 244 [2020-04-17 18:44:51,833 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:44:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-04-17 18:44:51,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 188. [2020-04-17 18:44:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 18:44:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 470 transitions. [2020-04-17 18:44:51,836 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 470 transitions. Word has length 14 [2020-04-17 18:44:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:51,836 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 470 transitions. [2020-04-17 18:44:51,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 470 transitions. [2020-04-17 18:44:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:51,837 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:51,837 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:52,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:52,040 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:52,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-04-17 18:44:52,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:52,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358565571] [2020-04-17 18:44:52,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:52,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358565571] [2020-04-17 18:44:52,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375398558] [2020-04-17 18:44:52,153 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:52,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:52,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:52,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:52,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:52,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780377671] [2020-04-17 18:44:52,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:52,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:52,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:52,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:52,325 INFO L87 Difference]: Start difference. First operand 188 states and 470 transitions. Second operand 17 states. [2020-04-17 18:44:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:52,414 INFO L93 Difference]: Finished difference Result 229 states and 552 transitions. [2020-04-17 18:44:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:44:52,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:52,415 INFO L225 Difference]: With dead ends: 229 [2020-04-17 18:44:52,415 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 18:44:52,416 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:44:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 18:44:52,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 194. [2020-04-17 18:44:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 18:44:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 488 transitions. [2020-04-17 18:44:52,420 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 488 transitions. Word has length 14 [2020-04-17 18:44:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:52,420 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 488 transitions. [2020-04-17 18:44:52,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 488 transitions. [2020-04-17 18:44:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:52,421 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:52,421 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:52,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:52,622 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:52,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-04-17 18:44:52,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:52,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137859022] [2020-04-17 18:44:52,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:52,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137859022] [2020-04-17 18:44:52,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655986263] [2020-04-17 18:44:52,718 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:52,754 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:52,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:52,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:52,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:52,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:52,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:52,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380175430] [2020-04-17 18:44:52,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:52,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:52,882 INFO L87 Difference]: Start difference. First operand 194 states and 488 transitions. Second operand 17 states. [2020-04-17 18:44:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:53,123 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-04-17 18:44:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:44:53,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:53,124 INFO L225 Difference]: With dead ends: 255 [2020-04-17 18:44:53,124 INFO L226 Difference]: Without dead ends: 253 [2020-04-17 18:44:53,125 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-04-17 18:44:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 192. [2020-04-17 18:44:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 18:44:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 18:44:53,129 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 18:44:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:53,129 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 18:44:53,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 18:44:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:53,129 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:53,130 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:53,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:53,330 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:53,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:53,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-04-17 18:44:53,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:53,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108400829] [2020-04-17 18:44:53,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:53,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108400829] [2020-04-17 18:44:53,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014923729] [2020-04-17 18:44:53,432 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:53,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:44:53,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:53,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:53,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:58,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:58,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:58,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64183615] [2020-04-17 18:44:58,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:58,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:58,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:58,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:58,168 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 18:44:58,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:58,451 INFO L93 Difference]: Finished difference Result 267 states and 630 transitions. [2020-04-17 18:44:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:44:58,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:58,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:58,453 INFO L225 Difference]: With dead ends: 267 [2020-04-17 18:44:58,453 INFO L226 Difference]: Without dead ends: 265 [2020-04-17 18:44:58,453 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:44:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-04-17 18:44:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 190. [2020-04-17 18:44:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-04-17 18:44:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 476 transitions. [2020-04-17 18:44:58,458 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 476 transitions. Word has length 14 [2020-04-17 18:44:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:58,458 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 476 transitions. [2020-04-17 18:44:58,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 476 transitions. [2020-04-17 18:44:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:58,459 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:58,459 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:58,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:58,662 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:58,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-04-17 18:44:58,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:58,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861936260] [2020-04-17 18:44:58,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:58,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861936260] [2020-04-17 18:44:58,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929928579] [2020-04-17 18:44:58,754 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:58,799 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:58,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:58,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:58,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:05,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:05,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:05,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101691513] [2020-04-17 18:45:05,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:05,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:05,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:05,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:05,281 INFO L87 Difference]: Start difference. First operand 190 states and 476 transitions. Second operand 17 states. [2020-04-17 18:45:05,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:05,695 INFO L93 Difference]: Finished difference Result 262 states and 618 transitions. [2020-04-17 18:45:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:05,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:05,696 INFO L225 Difference]: With dead ends: 262 [2020-04-17 18:45:05,697 INFO L226 Difference]: Without dead ends: 260 [2020-04-17 18:45:05,697 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:45:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-04-17 18:45:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 192. [2020-04-17 18:45:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 18:45:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 18:45:05,701 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 18:45:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:05,702 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 18:45:05,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 18:45:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:05,702 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:05,702 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:05,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:05,906 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:05,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:05,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-04-17 18:45:05,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:05,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240568917] [2020-04-17 18:45:05,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:05,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240568917] [2020-04-17 18:45:05,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792057363] [2020-04-17 18:45:05,984 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:06,027 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:06,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:06,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:06,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:06,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:06,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:06,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863999420] [2020-04-17 18:45:06,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:06,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:06,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:06,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:06,178 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 18:45:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:06,546 INFO L93 Difference]: Finished difference Result 280 states and 655 transitions. [2020-04-17 18:45:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:45:06,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:06,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:06,548 INFO L225 Difference]: With dead ends: 280 [2020-04-17 18:45:06,548 INFO L226 Difference]: Without dead ends: 278 [2020-04-17 18:45:06,548 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:45:06,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-04-17 18:45:06,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 192. [2020-04-17 18:45:06,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 18:45:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 18:45:06,552 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 18:45:06,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:06,552 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 18:45:06,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 18:45:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:06,553 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:06,553 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:06,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:06,754 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:06,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:06,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-04-17 18:45:06,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:06,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549452122] [2020-04-17 18:45:06,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:06,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549452122] [2020-04-17 18:45:06,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790316766] [2020-04-17 18:45:06,842 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:06,885 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:45:06,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:06,886 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:06,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:07,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:07,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:07,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079994947] [2020-04-17 18:45:07,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:07,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:07,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:07,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:07,039 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 18:45:07,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:07,399 INFO L93 Difference]: Finished difference Result 267 states and 631 transitions. [2020-04-17 18:45:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:45:07,400 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:07,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:07,401 INFO L225 Difference]: With dead ends: 267 [2020-04-17 18:45:07,401 INFO L226 Difference]: Without dead ends: 265 [2020-04-17 18:45:07,401 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:45:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-04-17 18:45:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 188. [2020-04-17 18:45:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 18:45:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 470 transitions. [2020-04-17 18:45:07,404 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 470 transitions. Word has length 14 [2020-04-17 18:45:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:07,404 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 470 transitions. [2020-04-17 18:45:07,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 470 transitions. [2020-04-17 18:45:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:07,405 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:07,405 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:07,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:07,606 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:07,606 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-04-17 18:45:07,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:07,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981163174] [2020-04-17 18:45:07,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:07,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981163174] [2020-04-17 18:45:07,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555251477] [2020-04-17 18:45:07,720 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:07,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:07,762 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:07,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:07,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:07,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918641608] [2020-04-17 18:45:07,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:07,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:07,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:07,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:07,909 INFO L87 Difference]: Start difference. First operand 188 states and 470 transitions. Second operand 17 states. [2020-04-17 18:45:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:08,041 INFO L93 Difference]: Finished difference Result 221 states and 536 transitions. [2020-04-17 18:45:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:45:08,042 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:08,042 INFO L225 Difference]: With dead ends: 221 [2020-04-17 18:45:08,042 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 18:45:08,043 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:45:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 18:45:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 192. [2020-04-17 18:45:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 18:45:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 18:45:08,046 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 18:45:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:08,046 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 18:45:08,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 18:45:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:08,047 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:08,047 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:08,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:08,248 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:08,248 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-04-17 18:45:08,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:08,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765062030] [2020-04-17 18:45:08,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:08,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765062030] [2020-04-17 18:45:08,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831263793] [2020-04-17 18:45:08,345 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:08,388 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:08,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:08,389 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:08,390 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:08,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:08,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:08,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382442420] [2020-04-17 18:45:08,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:08,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:08,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:08,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:08,518 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 18:45:08,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:08,768 INFO L93 Difference]: Finished difference Result 247 states and 588 transitions. [2020-04-17 18:45:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:08,768 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:08,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:08,769 INFO L225 Difference]: With dead ends: 247 [2020-04-17 18:45:08,769 INFO L226 Difference]: Without dead ends: 245 [2020-04-17 18:45:08,769 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:45:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-04-17 18:45:08,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 190. [2020-04-17 18:45:08,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-04-17 18:45:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 476 transitions. [2020-04-17 18:45:08,773 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 476 transitions. Word has length 14 [2020-04-17 18:45:08,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:08,773 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 476 transitions. [2020-04-17 18:45:08,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 476 transitions. [2020-04-17 18:45:08,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:08,774 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:08,774 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:08,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:08,975 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:08,976 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-04-17 18:45:08,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:08,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462936754] [2020-04-17 18:45:08,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:09,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462936754] [2020-04-17 18:45:09,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708636308] [2020-04-17 18:45:09,070 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:09,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:45:09,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:09,114 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:09,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:13,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:13,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:13,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621453608] [2020-04-17 18:45:13,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:13,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:13,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:13,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:13,459 INFO L87 Difference]: Start difference. First operand 190 states and 476 transitions. Second operand 17 states. [2020-04-17 18:45:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:13,785 INFO L93 Difference]: Finished difference Result 259 states and 614 transitions. [2020-04-17 18:45:13,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:13,786 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:13,786 INFO L225 Difference]: With dead ends: 259 [2020-04-17 18:45:13,786 INFO L226 Difference]: Without dead ends: 257 [2020-04-17 18:45:13,787 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:45:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-04-17 18:45:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 188. [2020-04-17 18:45:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 18:45:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 470 transitions. [2020-04-17 18:45:13,790 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 470 transitions. Word has length 14 [2020-04-17 18:45:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:13,790 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 470 transitions. [2020-04-17 18:45:13,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 470 transitions. [2020-04-17 18:45:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:13,791 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:13,791 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:13,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:13,992 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-04-17 18:45:13,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:13,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173668438] [2020-04-17 18:45:13,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:14,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173668438] [2020-04-17 18:45:14,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300509427] [2020-04-17 18:45:14,089 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:14,130 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:45:14,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:14,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:14,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:14,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:14,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:14,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858259666] [2020-04-17 18:45:14,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:14,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:14,254 INFO L87 Difference]: Start difference. First operand 188 states and 470 transitions. Second operand 17 states. [2020-04-17 18:45:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:14,418 INFO L93 Difference]: Finished difference Result 213 states and 520 transitions. [2020-04-17 18:45:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:45:14,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:14,419 INFO L225 Difference]: With dead ends: 213 [2020-04-17 18:45:14,419 INFO L226 Difference]: Without dead ends: 211 [2020-04-17 18:45:14,419 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:45:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-04-17 18:45:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 190. [2020-04-17 18:45:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-04-17 18:45:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 476 transitions. [2020-04-17 18:45:14,423 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 476 transitions. Word has length 14 [2020-04-17 18:45:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:14,423 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 476 transitions. [2020-04-17 18:45:14,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 476 transitions. [2020-04-17 18:45:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:14,424 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:14,424 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:14,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:14,625 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:14,625 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-04-17 18:45:14,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:14,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536810722] [2020-04-17 18:45:14,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:14,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536810722] [2020-04-17 18:45:14,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199079828] [2020-04-17 18:45:14,722 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:14,761 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:45:14,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:14,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:14,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:14,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:14,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:14,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735690220] [2020-04-17 18:45:14,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:14,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:14,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:14,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:14,878 INFO L87 Difference]: Start difference. First operand 190 states and 476 transitions. Second operand 17 states. [2020-04-17 18:45:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:15,173 INFO L93 Difference]: Finished difference Result 239 states and 572 transitions. [2020-04-17 18:45:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:45:15,173 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:15,174 INFO L225 Difference]: With dead ends: 239 [2020-04-17 18:45:15,174 INFO L226 Difference]: Without dead ends: 237 [2020-04-17 18:45:15,174 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:45:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-04-17 18:45:15,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 188. [2020-04-17 18:45:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 18:45:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 470 transitions. [2020-04-17 18:45:15,178 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 470 transitions. Word has length 14 [2020-04-17 18:45:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:15,178 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 470 transitions. [2020-04-17 18:45:15,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:15,178 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 470 transitions. [2020-04-17 18:45:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:15,179 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:15,179 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:15,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:15,379 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-04-17 18:45:15,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:15,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237738647] [2020-04-17 18:45:15,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:15,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237738647] [2020-04-17 18:45:15,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222092177] [2020-04-17 18:45:15,465 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:15,511 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:45:15,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:15,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:15,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:15,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:15,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:15,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929596554] [2020-04-17 18:45:15,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:15,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:15,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:15,637 INFO L87 Difference]: Start difference. First operand 188 states and 470 transitions. Second operand 17 states. [2020-04-17 18:45:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:15,807 INFO L93 Difference]: Finished difference Result 217 states and 532 transitions. [2020-04-17 18:45:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:45:15,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:15,808 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:45:15,809 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 18:45:15,809 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:45:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 18:45:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2020-04-17 18:45:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 18:45:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 490 transitions. [2020-04-17 18:45:15,813 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 490 transitions. Word has length 14 [2020-04-17 18:45:15,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:15,813 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 490 transitions. [2020-04-17 18:45:15,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 490 transitions. [2020-04-17 18:45:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:15,814 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:15,814 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:16,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:16,015 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:16,016 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-04-17 18:45:16,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:16,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339352198] [2020-04-17 18:45:16,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:16,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339352198] [2020-04-17 18:45:16,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655250507] [2020-04-17 18:45:16,090 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:16,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:16,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:16,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:45:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:16,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:16,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:16,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375252629] [2020-04-17 18:45:16,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:16,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:16,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:16,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:16,266 INFO L87 Difference]: Start difference. First operand 196 states and 490 transitions. Second operand 17 states. [2020-04-17 18:45:16,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:16,640 INFO L93 Difference]: Finished difference Result 241 states and 592 transitions. [2020-04-17 18:45:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:45:16,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:16,641 INFO L225 Difference]: With dead ends: 241 [2020-04-17 18:45:16,641 INFO L226 Difference]: Without dead ends: 236 [2020-04-17 18:45:16,641 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:45:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-04-17 18:45:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 196. [2020-04-17 18:45:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 18:45:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 490 transitions. [2020-04-17 18:45:16,646 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 490 transitions. Word has length 14 [2020-04-17 18:45:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:16,646 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 490 transitions. [2020-04-17 18:45:16,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:16,646 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 490 transitions. [2020-04-17 18:45:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:16,647 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:16,647 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:16,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:16,848 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-04-17 18:45:16,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:16,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479422638] [2020-04-17 18:45:16,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:16,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479422638] [2020-04-17 18:45:16,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410617167] [2020-04-17 18:45:16,932 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:16,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:16,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:16,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:16,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:17,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:17,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:17,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41949256] [2020-04-17 18:45:17,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:17,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:17,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:17,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:17,103 INFO L87 Difference]: Start difference. First operand 196 states and 490 transitions. Second operand 17 states. [2020-04-17 18:45:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:17,415 INFO L93 Difference]: Finished difference Result 245 states and 596 transitions. [2020-04-17 18:45:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:45:17,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:17,416 INFO L225 Difference]: With dead ends: 245 [2020-04-17 18:45:17,416 INFO L226 Difference]: Without dead ends: 243 [2020-04-17 18:45:17,416 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:45:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-04-17 18:45:17,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 198. [2020-04-17 18:45:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 18:45:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 497 transitions. [2020-04-17 18:45:17,420 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 497 transitions. Word has length 14 [2020-04-17 18:45:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:17,420 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 497 transitions. [2020-04-17 18:45:17,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 497 transitions. [2020-04-17 18:45:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:17,420 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:17,420 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:17,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:17,621 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:17,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:17,622 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-04-17 18:45:17,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:17,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397441130] [2020-04-17 18:45:17,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:17,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397441130] [2020-04-17 18:45:17,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78144716] [2020-04-17 18:45:17,697 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:17,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:45:17,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:17,742 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:17,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:17,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:45:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:17,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:17,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:17,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203530717] [2020-04-17 18:45:17,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:17,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:17,893 INFO L87 Difference]: Start difference. First operand 198 states and 497 transitions. Second operand 17 states. [2020-04-17 18:45:18,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:18,917 INFO L93 Difference]: Finished difference Result 267 states and 653 transitions. [2020-04-17 18:45:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:45:18,918 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:18,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:18,918 INFO L225 Difference]: With dead ends: 267 [2020-04-17 18:45:18,919 INFO L226 Difference]: Without dead ends: 262 [2020-04-17 18:45:18,919 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:45:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-04-17 18:45:18,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 198. [2020-04-17 18:45:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 18:45:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 497 transitions. [2020-04-17 18:45:18,924 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 497 transitions. Word has length 14 [2020-04-17 18:45:18,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:18,924 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 497 transitions. [2020-04-17 18:45:18,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 497 transitions. [2020-04-17 18:45:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:18,925 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:18,925 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:19,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:19,128 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:19,129 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-04-17 18:45:19,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:19,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240710478] [2020-04-17 18:45:19,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:19,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240710478] [2020-04-17 18:45:19,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411288355] [2020-04-17 18:45:19,198 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:19,236 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:45:19,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:19,237 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:19,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:19,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:45:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:19,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:19,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:19,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36970492] [2020-04-17 18:45:19,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:19,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:19,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:19,357 INFO L87 Difference]: Start difference. First operand 198 states and 497 transitions. Second operand 17 states. [2020-04-17 18:45:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:19,716 INFO L93 Difference]: Finished difference Result 266 states and 648 transitions. [2020-04-17 18:45:19,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:45:19,716 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:19,717 INFO L225 Difference]: With dead ends: 266 [2020-04-17 18:45:19,717 INFO L226 Difference]: Without dead ends: 261 [2020-04-17 18:45:19,718 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:45:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-04-17 18:45:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 196. [2020-04-17 18:45:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 18:45:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 490 transitions. [2020-04-17 18:45:19,721 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 490 transitions. Word has length 14 [2020-04-17 18:45:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:19,722 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 490 transitions. [2020-04-17 18:45:19,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 490 transitions. [2020-04-17 18:45:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:19,723 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:19,723 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:19,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:19,926 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:19,927 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-04-17 18:45:19,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:19,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343419487] [2020-04-17 18:45:19,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:19,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343419487] [2020-04-17 18:45:19,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942865428] [2020-04-17 18:45:19,998 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:20,040 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:45:20,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:20,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:20,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:21,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:21,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:21,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341664540] [2020-04-17 18:45:21,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:21,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:21,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:21,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=206, Unknown=2, NotChecked=0, Total=272 [2020-04-17 18:45:21,383 INFO L87 Difference]: Start difference. First operand 196 states and 490 transitions. Second operand 17 states. [2020-04-17 18:45:21,888 WARN L192 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 18:45:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:22,585 INFO L93 Difference]: Finished difference Result 272 states and 650 transitions. [2020-04-17 18:45:22,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:45:22,585 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:22,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:22,586 INFO L225 Difference]: With dead ends: 272 [2020-04-17 18:45:22,586 INFO L226 Difference]: Without dead ends: 270 [2020-04-17 18:45:22,586 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=201, Invalid=499, Unknown=2, NotChecked=0, Total=702 [2020-04-17 18:45:22,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-04-17 18:45:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 198. [2020-04-17 18:45:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 18:45:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 497 transitions. [2020-04-17 18:45:22,590 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 497 transitions. Word has length 14 [2020-04-17 18:45:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:22,590 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 497 transitions. [2020-04-17 18:45:22,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 497 transitions. [2020-04-17 18:45:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:22,591 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:22,591 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:22,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:22,794 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:22,795 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-04-17 18:45:22,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:22,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403779629] [2020-04-17 18:45:22,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:22,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403779629] [2020-04-17 18:45:22,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041450635] [2020-04-17 18:45:22,864 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:22,906 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:45:22,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:22,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:22,908 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:23,650 WARN L192 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-04-17 18:45:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:25,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:25,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:25,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915725535] [2020-04-17 18:45:25,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:25,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:25,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:25,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:25,684 INFO L87 Difference]: Start difference. First operand 198 states and 497 transitions. Second operand 17 states. [2020-04-17 18:45:26,021 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-17 18:45:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:26,928 INFO L93 Difference]: Finished difference Result 282 states and 681 transitions. [2020-04-17 18:45:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:45:26,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:26,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:26,929 INFO L225 Difference]: With dead ends: 282 [2020-04-17 18:45:26,930 INFO L226 Difference]: Without dead ends: 280 [2020-04-17 18:45:26,930 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:45:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-04-17 18:45:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 202. [2020-04-17 18:45:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-04-17 18:45:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 511 transitions. [2020-04-17 18:45:26,934 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 511 transitions. Word has length 14 [2020-04-17 18:45:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:26,934 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 511 transitions. [2020-04-17 18:45:26,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:26,934 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 511 transitions. [2020-04-17 18:45:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:26,935 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:26,935 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:27,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:27,136 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-04-17 18:45:27,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:27,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278606920] [2020-04-17 18:45:27,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:27,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278606920] [2020-04-17 18:45:27,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358507941] [2020-04-17 18:45:27,212 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:27,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:27,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:27,908 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_489 Int)) (and (<= (div (+ (* v_~i~0_489 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ v_~i~0_489 (* 2 c_~j~0))) (<= c_~j~0 (+ v_~i~0_489 1)))) is different from true [2020-04-17 18:45:27,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:45:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:27,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:27,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:27,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033533242] [2020-04-17 18:45:27,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:27,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:27,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:27,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=159, Unknown=1, NotChecked=28, Total=272 [2020-04-17 18:45:27,923 INFO L87 Difference]: Start difference. First operand 202 states and 511 transitions. Second operand 17 states. [2020-04-17 18:45:28,844 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-17 18:45:29,515 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 18:45:31,018 WARN L192 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-04-17 18:45:31,631 WARN L192 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-04-17 18:45:31,960 WARN L192 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-04-17 18:45:32,646 WARN L192 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-04-17 18:45:33,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:33,576 INFO L93 Difference]: Finished difference Result 297 states and 731 transitions. [2020-04-17 18:45:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:45:33,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:33,577 INFO L225 Difference]: With dead ends: 297 [2020-04-17 18:45:33,577 INFO L226 Difference]: Without dead ends: 292 [2020-04-17 18:45:33,577 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=464, Invalid=1017, Unknown=5, NotChecked=74, Total=1560 [2020-04-17 18:45:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-04-17 18:45:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 202. [2020-04-17 18:45:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-04-17 18:45:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 511 transitions. [2020-04-17 18:45:33,581 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 511 transitions. Word has length 14 [2020-04-17 18:45:33,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:33,581 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 511 transitions. [2020-04-17 18:45:33,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 511 transitions. [2020-04-17 18:45:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:33,582 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:33,582 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:33,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:33,783 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:33,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:33,783 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-04-17 18:45:33,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:33,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653513243] [2020-04-17 18:45:33,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:33,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653513243] [2020-04-17 18:45:33,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962769343] [2020-04-17 18:45:33,861 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:33,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:33,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:33,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:33,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:35,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:45:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:35,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:35,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:45:35,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53588022] [2020-04-17 18:45:35,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:45:35,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:35,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:45:35,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=213, Unknown=3, NotChecked=0, Total=306 [2020-04-17 18:45:35,598 INFO L87 Difference]: Start difference. First operand 202 states and 511 transitions. Second operand 18 states. [2020-04-17 18:45:36,535 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2020-04-17 18:45:38,915 WARN L192 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-04-17 18:45:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:43,205 INFO L93 Difference]: Finished difference Result 328 states and 801 transitions. [2020-04-17 18:45:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:45:43,206 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:45:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:43,207 INFO L225 Difference]: With dead ends: 328 [2020-04-17 18:45:43,207 INFO L226 Difference]: Without dead ends: 320 [2020-04-17 18:45:43,207 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=401, Invalid=925, Unknown=6, NotChecked=0, Total=1332 [2020-04-17 18:45:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-04-17 18:45:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 198. [2020-04-17 18:45:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 18:45:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 500 transitions. [2020-04-17 18:45:43,212 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 500 transitions. Word has length 14 [2020-04-17 18:45:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:43,212 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 500 transitions. [2020-04-17 18:45:43,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:45:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 500 transitions. [2020-04-17 18:45:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:43,212 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:43,212 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:43,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:43,413 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:43,414 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-04-17 18:45:43,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:43,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087799061] [2020-04-17 18:45:43,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:43,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087799061] [2020-04-17 18:45:43,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693142012] [2020-04-17 18:45:43,485 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:43,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:45:43,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:43,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:43,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:43,888 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-04-17 18:45:43,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:45:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:43,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:43,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:43,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941189542] [2020-04-17 18:45:43,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:43,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:43,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:43,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:43,904 INFO L87 Difference]: Start difference. First operand 198 states and 500 transitions. Second operand 17 states. [2020-04-17 18:45:45,122 WARN L192 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-17 18:45:46,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:46,142 INFO L93 Difference]: Finished difference Result 286 states and 702 transitions. [2020-04-17 18:45:46,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:45:46,142 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:46,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:46,143 INFO L225 Difference]: With dead ends: 286 [2020-04-17 18:45:46,143 INFO L226 Difference]: Without dead ends: 281 [2020-04-17 18:45:46,144 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=338, Invalid=716, Unknown=2, NotChecked=0, Total=1056 [2020-04-17 18:45:46,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-04-17 18:45:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2020-04-17 18:45:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 18:45:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 490 transitions. [2020-04-17 18:45:46,148 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 490 transitions. Word has length 14 [2020-04-17 18:45:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:46,148 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 490 transitions. [2020-04-17 18:45:46,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 490 transitions. [2020-04-17 18:45:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:46,148 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:46,149 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:46,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:46,349 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:46,350 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-04-17 18:45:46,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:46,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136632661] [2020-04-17 18:45:46,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:46,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136632661] [2020-04-17 18:45:46,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347883414] [2020-04-17 18:45:46,432 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:46,474 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:45:46,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:46,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:46,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:53,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:53,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:53,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018835495] [2020-04-17 18:45:53,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:53,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:53,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:53,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:53,478 INFO L87 Difference]: Start difference. First operand 196 states and 490 transitions. Second operand 17 states. [2020-04-17 18:45:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:53,841 INFO L93 Difference]: Finished difference Result 275 states and 652 transitions. [2020-04-17 18:45:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:53,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:53,843 INFO L225 Difference]: With dead ends: 275 [2020-04-17 18:45:53,843 INFO L226 Difference]: Without dead ends: 273 [2020-04-17 18:45:53,843 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:45:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-04-17 18:45:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 199. [2020-04-17 18:45:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-04-17 18:45:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 501 transitions. [2020-04-17 18:45:53,847 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 501 transitions. Word has length 14 [2020-04-17 18:45:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:53,848 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 501 transitions. [2020-04-17 18:45:53,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:53,848 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 501 transitions. [2020-04-17 18:45:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:53,848 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:53,848 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:54,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:54,049 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-04-17 18:45:54,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:54,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473836538] [2020-04-17 18:45:54,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:54,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473836538] [2020-04-17 18:45:54,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704744119] [2020-04-17 18:45:54,147 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:54,217 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:54,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:54,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:54,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:54,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:54,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:54,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237528212] [2020-04-17 18:45:54,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:54,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:54,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:54,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:54,479 INFO L87 Difference]: Start difference. First operand 199 states and 501 transitions. Second operand 17 states. [2020-04-17 18:45:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:54,836 INFO L93 Difference]: Finished difference Result 289 states and 680 transitions. [2020-04-17 18:45:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:54,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:54,837 INFO L225 Difference]: With dead ends: 289 [2020-04-17 18:45:54,837 INFO L226 Difference]: Without dead ends: 287 [2020-04-17 18:45:54,837 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:45:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-04-17 18:45:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 200. [2020-04-17 18:45:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-04-17 18:45:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 503 transitions. [2020-04-17 18:45:54,842 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 503 transitions. Word has length 14 [2020-04-17 18:45:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:54,842 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 503 transitions. [2020-04-17 18:45:54,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 503 transitions. [2020-04-17 18:45:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:54,843 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:54,843 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:55,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:55,044 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:55,044 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-04-17 18:45:55,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:55,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383036777] [2020-04-17 18:45:55,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:55,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383036777] [2020-04-17 18:45:55,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065792405] [2020-04-17 18:45:55,138 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:55,182 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:45:55,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:55,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:55,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:55,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:55,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:55,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688833791] [2020-04-17 18:45:55,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:55,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:55,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:55,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:55,326 INFO L87 Difference]: Start difference. First operand 200 states and 503 transitions. Second operand 17 states. [2020-04-17 18:45:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:55,659 INFO L93 Difference]: Finished difference Result 279 states and 660 transitions. [2020-04-17 18:45:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:45:55,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:55,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:55,660 INFO L225 Difference]: With dead ends: 279 [2020-04-17 18:45:55,660 INFO L226 Difference]: Without dead ends: 277 [2020-04-17 18:45:55,661 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:45:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-04-17 18:45:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-04-17 18:45:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 18:45:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 497 transitions. [2020-04-17 18:45:55,664 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 497 transitions. Word has length 14 [2020-04-17 18:45:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:55,664 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 497 transitions. [2020-04-17 18:45:55,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 497 transitions. [2020-04-17 18:45:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:55,664 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:55,664 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:55,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:55,869 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:55,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:55,870 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-04-17 18:45:55,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:55,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247812534] [2020-04-17 18:45:55,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:55,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247812534] [2020-04-17 18:45:55,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582653226] [2020-04-17 18:45:55,946 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:55,992 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:55,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:56,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:56,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:56,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79157596] [2020-04-17 18:45:56,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:56,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:56,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:56,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:56,658 INFO L87 Difference]: Start difference. First operand 198 states and 497 transitions. Second operand 17 states. [2020-04-17 18:45:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:57,215 INFO L93 Difference]: Finished difference Result 280 states and 665 transitions. [2020-04-17 18:45:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:45:57,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:57,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:57,216 INFO L225 Difference]: With dead ends: 280 [2020-04-17 18:45:57,216 INFO L226 Difference]: Without dead ends: 278 [2020-04-17 18:45:57,216 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:45:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-04-17 18:45:57,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 200. [2020-04-17 18:45:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-04-17 18:45:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 505 transitions. [2020-04-17 18:45:57,220 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 505 transitions. Word has length 14 [2020-04-17 18:45:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:57,220 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 505 transitions. [2020-04-17 18:45:57,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 505 transitions. [2020-04-17 18:45:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:57,221 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:57,221 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:57,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:57,425 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-04-17 18:45:57,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:57,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040257818] [2020-04-17 18:45:57,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:57,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040257818] [2020-04-17 18:45:57,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147821371] [2020-04-17 18:45:57,526 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:57,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:57,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:57,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:57,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:57,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:57,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:57,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645183861] [2020-04-17 18:45:57,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:57,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:57,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:57,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:57,735 INFO L87 Difference]: Start difference. First operand 200 states and 505 transitions. Second operand 17 states. [2020-04-17 18:45:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:58,290 INFO L93 Difference]: Finished difference Result 309 states and 730 transitions. [2020-04-17 18:45:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:45:58,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:58,291 INFO L225 Difference]: With dead ends: 309 [2020-04-17 18:45:58,291 INFO L226 Difference]: Without dead ends: 307 [2020-04-17 18:45:58,291 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:45:58,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-04-17 18:45:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 203. [2020-04-17 18:45:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-04-17 18:45:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 514 transitions. [2020-04-17 18:45:58,296 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 514 transitions. Word has length 14 [2020-04-17 18:45:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:58,296 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 514 transitions. [2020-04-17 18:45:58,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 514 transitions. [2020-04-17 18:45:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:58,297 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:58,297 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:58,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:58,500 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:58,500 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-04-17 18:45:58,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:58,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705328944] [2020-04-17 18:45:58,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:58,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705328944] [2020-04-17 18:45:58,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595534665] [2020-04-17 18:45:58,577 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:58,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:45:58,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:58,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:58,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:00,434 WARN L192 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-17 18:46:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:00,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:00,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:46:00,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861003319] [2020-04-17 18:46:00,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:46:00,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:00,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:46:00,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=222, Unknown=2, NotChecked=0, Total=306 [2020-04-17 18:46:00,436 INFO L87 Difference]: Start difference. First operand 203 states and 514 transitions. Second operand 18 states. [2020-04-17 18:46:01,393 WARN L192 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-04-17 18:46:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:04,109 INFO L93 Difference]: Finished difference Result 286 states and 688 transitions. [2020-04-17 18:46:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:46:04,110 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:46:04,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:04,110 INFO L225 Difference]: With dead ends: 286 [2020-04-17 18:46:04,110 INFO L226 Difference]: Without dead ends: 284 [2020-04-17 18:46:04,110 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=325, Invalid=729, Unknown=2, NotChecked=0, Total=1056 [2020-04-17 18:46:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-04-17 18:46:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 205. [2020-04-17 18:46:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-04-17 18:46:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 521 transitions. [2020-04-17 18:46:04,115 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 521 transitions. Word has length 14 [2020-04-17 18:46:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:04,115 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 521 transitions. [2020-04-17 18:46:04,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:46:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 521 transitions. [2020-04-17 18:46:04,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:04,116 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:04,116 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:04,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:04,317 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:04,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:04,317 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-04-17 18:46:04,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:04,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494415745] [2020-04-17 18:46:04,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:04,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494415745] [2020-04-17 18:46:04,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441393210] [2020-04-17 18:46:04,398 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:04,443 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:04,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:04,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:04,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:04,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:04,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:04,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:04,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607231659] [2020-04-17 18:46:04,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:04,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:04,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:04,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:04,663 INFO L87 Difference]: Start difference. First operand 205 states and 521 transitions. Second operand 17 states. [2020-04-17 18:46:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:05,463 INFO L93 Difference]: Finished difference Result 276 states and 679 transitions. [2020-04-17 18:46:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:46:05,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:05,464 INFO L225 Difference]: With dead ends: 276 [2020-04-17 18:46:05,464 INFO L226 Difference]: Without dead ends: 271 [2020-04-17 18:46:05,464 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:46:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-04-17 18:46:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 205. [2020-04-17 18:46:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-04-17 18:46:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 521 transitions. [2020-04-17 18:46:05,469 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 521 transitions. Word has length 14 [2020-04-17 18:46:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:05,469 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 521 transitions. [2020-04-17 18:46:05,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 521 transitions. [2020-04-17 18:46:05,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:05,469 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:05,469 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:05,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:05,670 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:05,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:05,671 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-04-17 18:46:05,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:05,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58712052] [2020-04-17 18:46:05,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:05,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58712052] [2020-04-17 18:46:05,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318950084] [2020-04-17 18:46:05,757 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:05,800 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:46:05,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:05,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:05,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:05,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:06,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:06,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:06,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649731222] [2020-04-17 18:46:06,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:06,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:06,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:06,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:06,392 INFO L87 Difference]: Start difference. First operand 205 states and 521 transitions. Second operand 17 states. [2020-04-17 18:46:09,486 WARN L192 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-17 18:46:10,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:10,242 INFO L93 Difference]: Finished difference Result 309 states and 759 transitions. [2020-04-17 18:46:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:46:10,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:10,243 INFO L225 Difference]: With dead ends: 309 [2020-04-17 18:46:10,244 INFO L226 Difference]: Without dead ends: 304 [2020-04-17 18:46:10,244 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:46:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-04-17 18:46:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 203. [2020-04-17 18:46:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-04-17 18:46:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 514 transitions. [2020-04-17 18:46:10,248 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 514 transitions. Word has length 14 [2020-04-17 18:46:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:10,249 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 514 transitions. [2020-04-17 18:46:10,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 514 transitions. [2020-04-17 18:46:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:10,249 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:10,249 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:10,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:10,450 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:10,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:10,451 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-04-17 18:46:10,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:10,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910900246] [2020-04-17 18:46:10,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:10,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910900246] [2020-04-17 18:46:10,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270566124] [2020-04-17 18:46:10,535 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:10,576 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:46:10,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:10,577 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:10,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:12,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:12,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:12,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561245762] [2020-04-17 18:46:12,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:12,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:12,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:12,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:12,776 INFO L87 Difference]: Start difference. First operand 203 states and 514 transitions. Second operand 17 states. [2020-04-17 18:46:13,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:13,436 INFO L93 Difference]: Finished difference Result 315 states and 760 transitions. [2020-04-17 18:46:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 18:46:13,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:13,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:13,438 INFO L225 Difference]: With dead ends: 315 [2020-04-17 18:46:13,438 INFO L226 Difference]: Without dead ends: 313 [2020-04-17 18:46:13,438 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=350, Invalid=840, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 18:46:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-04-17 18:46:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 207. [2020-04-17 18:46:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-04-17 18:46:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 528 transitions. [2020-04-17 18:46:13,442 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 528 transitions. Word has length 14 [2020-04-17 18:46:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:13,442 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 528 transitions. [2020-04-17 18:46:13,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 528 transitions. [2020-04-17 18:46:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:13,443 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:13,443 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:13,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:13,644 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:13,644 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-04-17 18:46:13,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:13,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982529682] [2020-04-17 18:46:13,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:13,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982529682] [2020-04-17 18:46:13,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265016678] [2020-04-17 18:46:13,729 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:13,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:13,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:13,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:13,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:13,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:13,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295194249] [2020-04-17 18:46:13,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:13,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:13,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:13,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:13,944 INFO L87 Difference]: Start difference. First operand 207 states and 528 transitions. Second operand 17 states. [2020-04-17 18:46:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:14,794 INFO L93 Difference]: Finished difference Result 357 states and 884 transitions. [2020-04-17 18:46:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:46:14,795 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:14,796 INFO L225 Difference]: With dead ends: 357 [2020-04-17 18:46:14,796 INFO L226 Difference]: Without dead ends: 349 [2020-04-17 18:46:14,796 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 18:46:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-04-17 18:46:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 208. [2020-04-17 18:46:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-04-17 18:46:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 533 transitions. [2020-04-17 18:46:14,801 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 533 transitions. Word has length 14 [2020-04-17 18:46:14,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:14,801 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 533 transitions. [2020-04-17 18:46:14,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 533 transitions. [2020-04-17 18:46:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:14,801 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:14,801 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:15,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:15,002 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:15,003 INFO L82 PathProgramCache]: Analyzing trace with hash -742318452, now seen corresponding path program 170 times [2020-04-17 18:46:15,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:15,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051126974] [2020-04-17 18:46:15,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:15,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051126974] [2020-04-17 18:46:15,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295641924] [2020-04-17 18:46:15,075 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:15,115 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:15,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:15,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:15,116 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:15,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:15,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:15,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:15,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301905974] [2020-04-17 18:46:15,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:15,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:15,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:15,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:15,315 INFO L87 Difference]: Start difference. First operand 208 states and 533 transitions. Second operand 17 states. [2020-04-17 18:46:16,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:16,253 INFO L93 Difference]: Finished difference Result 335 states and 824 transitions. [2020-04-17 18:46:16,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:46:16,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:16,254 INFO L225 Difference]: With dead ends: 335 [2020-04-17 18:46:16,254 INFO L226 Difference]: Without dead ends: 327 [2020-04-17 18:46:16,255 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 18:46:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-04-17 18:46:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 200. [2020-04-17 18:46:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-04-17 18:46:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 508 transitions. [2020-04-17 18:46:16,259 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 508 transitions. Word has length 14 [2020-04-17 18:46:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:16,259 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 508 transitions. [2020-04-17 18:46:16,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 508 transitions. [2020-04-17 18:46:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:16,259 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:16,259 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:16,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:16,460 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:16,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:16,461 INFO L82 PathProgramCache]: Analyzing trace with hash -742110132, now seen corresponding path program 171 times [2020-04-17 18:46:16,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:16,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201592480] [2020-04-17 18:46:16,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:16,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201592480] [2020-04-17 18:46:16,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219859116] [2020-04-17 18:46:16,534 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:16,578 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:16,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:16,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:16,580 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:16,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:16,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:16,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395880473] [2020-04-17 18:46:16,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:16,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:16,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:16,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:16,712 INFO L87 Difference]: Start difference. First operand 200 states and 508 transitions. Second operand 17 states. [2020-04-17 18:46:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:17,074 INFO L93 Difference]: Finished difference Result 278 states and 665 transitions. [2020-04-17 18:46:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:17,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:17,075 INFO L225 Difference]: With dead ends: 278 [2020-04-17 18:46:17,075 INFO L226 Difference]: Without dead ends: 276 [2020-04-17 18:46:17,076 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:17,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-04-17 18:46:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 199. [2020-04-17 18:46:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-04-17 18:46:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 505 transitions. [2020-04-17 18:46:17,080 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 505 transitions. Word has length 14 [2020-04-17 18:46:17,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:17,080 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 505 transitions. [2020-04-17 18:46:17,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 505 transitions. [2020-04-17 18:46:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:17,081 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:17,081 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:17,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:17,282 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:17,282 INFO L82 PathProgramCache]: Analyzing trace with hash -741447042, now seen corresponding path program 172 times [2020-04-17 18:46:17,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:17,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373366166] [2020-04-17 18:46:17,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:17,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373366166] [2020-04-17 18:46:17,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477315188] [2020-04-17 18:46:17,357 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:17,402 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:17,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:17,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:17,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:17,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:17,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:17,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926565630] [2020-04-17 18:46:17,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:17,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:17,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:17,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:17,578 INFO L87 Difference]: Start difference. First operand 199 states and 505 transitions. Second operand 17 states. [2020-04-17 18:46:18,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:18,113 INFO L93 Difference]: Finished difference Result 293 states and 707 transitions. [2020-04-17 18:46:18,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:46:18,114 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:18,114 INFO L225 Difference]: With dead ends: 293 [2020-04-17 18:46:18,115 INFO L226 Difference]: Without dead ends: 291 [2020-04-17 18:46:18,115 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:46:18,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-04-17 18:46:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 200. [2020-04-17 18:46:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-04-17 18:46:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 507 transitions. [2020-04-17 18:46:18,119 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 507 transitions. Word has length 14 [2020-04-17 18:46:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:18,119 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 507 transitions. [2020-04-17 18:46:18,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 507 transitions. [2020-04-17 18:46:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:18,120 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:18,120 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:18,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:18,321 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:18,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:18,322 INFO L82 PathProgramCache]: Analyzing trace with hash -741424722, now seen corresponding path program 173 times [2020-04-17 18:46:18,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:18,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461800295] [2020-04-17 18:46:18,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:18,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461800295] [2020-04-17 18:46:18,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613282081] [2020-04-17 18:46:18,391 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:18,434 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:46:18,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:18,435 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:18,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:18,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:18,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:18,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:18,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114888775] [2020-04-17 18:46:18,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:18,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:18,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:18,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:18,596 INFO L87 Difference]: Start difference. First operand 200 states and 507 transitions. Second operand 17 states. [2020-04-17 18:46:19,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:19,437 INFO L93 Difference]: Finished difference Result 325 states and 789 transitions. [2020-04-17 18:46:19,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:46:19,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:19,438 INFO L225 Difference]: With dead ends: 325 [2020-04-17 18:46:19,438 INFO L226 Difference]: Without dead ends: 320 [2020-04-17 18:46:19,438 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 18:46:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-04-17 18:46:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 196. [2020-04-17 18:46:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 18:46:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 490 transitions. [2020-04-17 18:46:19,442 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 490 transitions. Word has length 14 [2020-04-17 18:46:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:19,442 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 490 transitions. [2020-04-17 18:46:19,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 490 transitions. [2020-04-17 18:46:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:19,442 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:19,442 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:19,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:19,643 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:19,644 INFO L82 PathProgramCache]: Analyzing trace with hash -541944403, now seen corresponding path program 174 times [2020-04-17 18:46:19,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:19,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714962818] [2020-04-17 18:46:19,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:19,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714962818] [2020-04-17 18:46:19,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247810651] [2020-04-17 18:46:19,716 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:19,756 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:19,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:19,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:19,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:19,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:19,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:19,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125720426] [2020-04-17 18:46:19,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:19,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:19,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:19,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:19,883 INFO L87 Difference]: Start difference. First operand 196 states and 490 transitions. Second operand 17 states. [2020-04-17 18:46:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:20,217 INFO L93 Difference]: Finished difference Result 278 states and 656 transitions. [2020-04-17 18:46:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:20,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:20,218 INFO L225 Difference]: With dead ends: 278 [2020-04-17 18:46:20,218 INFO L226 Difference]: Without dead ends: 276 [2020-04-17 18:46:20,219 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:46:20,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-04-17 18:46:20,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 200. [2020-04-17 18:46:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-04-17 18:46:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 504 transitions. [2020-04-17 18:46:20,224 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 504 transitions. Word has length 14 [2020-04-17 18:46:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:20,224 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 504 transitions. [2020-04-17 18:46:20,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 504 transitions. [2020-04-17 18:46:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:20,225 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:20,225 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:20,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:20,428 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash -541943442, now seen corresponding path program 175 times [2020-04-17 18:46:20,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:20,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161458154] [2020-04-17 18:46:20,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:20,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161458154] [2020-04-17 18:46:20,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951088388] [2020-04-17 18:46:20,499 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:20,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:20,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:21,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:21,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:21,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947191643] [2020-04-17 18:46:21,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:21,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:21,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:21,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:21,012 INFO L87 Difference]: Start difference. First operand 200 states and 504 transitions. Second operand 17 states. [2020-04-17 18:46:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:21,357 INFO L93 Difference]: Finished difference Result 298 states and 696 transitions. [2020-04-17 18:46:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:21,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:21,358 INFO L225 Difference]: With dead ends: 298 [2020-04-17 18:46:21,358 INFO L226 Difference]: Without dead ends: 296 [2020-04-17 18:46:21,358 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:46:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-04-17 18:46:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 201. [2020-04-17 18:46:21,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-04-17 18:46:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 507 transitions. [2020-04-17 18:46:21,362 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 507 transitions. Word has length 14 [2020-04-17 18:46:21,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:21,362 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 507 transitions. [2020-04-17 18:46:21,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 507 transitions. [2020-04-17 18:46:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:21,363 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:21,363 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:21,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:21,564 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:21,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash -541914612, now seen corresponding path program 176 times [2020-04-17 18:46:21,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:21,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215716389] [2020-04-17 18:46:21,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:21,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215716389] [2020-04-17 18:46:21,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109044759] [2020-04-17 18:46:21,639 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:21,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:21,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:21,683 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:21,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:21,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:21,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:21,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659885775] [2020-04-17 18:46:21,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:21,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:21,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:21,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:21,816 INFO L87 Difference]: Start difference. First operand 201 states and 507 transitions. Second operand 17 states. [2020-04-17 18:46:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:22,152 INFO L93 Difference]: Finished difference Result 298 states and 699 transitions. [2020-04-17 18:46:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:22,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:22,154 INFO L225 Difference]: With dead ends: 298 [2020-04-17 18:46:22,154 INFO L226 Difference]: Without dead ends: 296 [2020-04-17 18:46:22,154 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-04-17 18:46:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 200. [2020-04-17 18:46:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-04-17 18:46:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 504 transitions. [2020-04-17 18:46:22,160 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 504 transitions. Word has length 14 [2020-04-17 18:46:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:22,160 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 504 transitions. [2020-04-17 18:46:22,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 504 transitions. [2020-04-17 18:46:22,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:22,162 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:22,162 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:22,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:22,366 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:22,367 INFO L82 PathProgramCache]: Analyzing trace with hash -540990130, now seen corresponding path program 177 times [2020-04-17 18:46:22,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:22,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527842989] [2020-04-17 18:46:22,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:22,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527842989] [2020-04-17 18:46:22,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526536094] [2020-04-17 18:46:22,450 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:22,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:22,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:22,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:22,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:22,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:22,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:22,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643254040] [2020-04-17 18:46:22,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:22,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:22,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:22,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:22,652 INFO L87 Difference]: Start difference. First operand 200 states and 504 transitions. Second operand 17 states. [2020-04-17 18:46:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:22,929 INFO L93 Difference]: Finished difference Result 270 states and 635 transitions. [2020-04-17 18:46:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:22,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:22,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:22,931 INFO L225 Difference]: With dead ends: 270 [2020-04-17 18:46:22,931 INFO L226 Difference]: Without dead ends: 262 [2020-04-17 18:46:22,931 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:46:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-04-17 18:46:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 198. [2020-04-17 18:46:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 18:46:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 496 transitions. [2020-04-17 18:46:22,935 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 496 transitions. Word has length 14 [2020-04-17 18:46:22,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:22,936 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 496 transitions. [2020-04-17 18:46:22,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 496 transitions. [2020-04-17 18:46:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:22,936 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:22,936 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:23,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:23,137 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:23,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:23,138 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 178 times [2020-04-17 18:46:23,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:23,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509103807] [2020-04-17 18:46:23,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:23,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509103807] [2020-04-17 18:46:23,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415308299] [2020-04-17 18:46:23,212 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:23,252 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:23,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:23,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:23,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:23,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:23,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:23,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608959003] [2020-04-17 18:46:23,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:23,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:23,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:23,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:23,370 INFO L87 Difference]: Start difference. First operand 198 states and 496 transitions. Second operand 17 states. [2020-04-17 18:46:23,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:23,893 INFO L93 Difference]: Finished difference Result 292 states and 687 transitions. [2020-04-17 18:46:23,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:46:23,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:23,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:23,894 INFO L225 Difference]: With dead ends: 292 [2020-04-17 18:46:23,894 INFO L226 Difference]: Without dead ends: 290 [2020-04-17 18:46:23,895 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:46:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-04-17 18:46:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 201. [2020-04-17 18:46:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-04-17 18:46:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 507 transitions. [2020-04-17 18:46:23,899 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 507 transitions. Word has length 14 [2020-04-17 18:46:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:23,899 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 507 transitions. [2020-04-17 18:46:23,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 507 transitions. [2020-04-17 18:46:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:23,899 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:23,899 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:24,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:24,100 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:24,101 INFO L82 PathProgramCache]: Analyzing trace with hash 95286048, now seen corresponding path program 179 times [2020-04-17 18:46:24,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:24,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33055841] [2020-04-17 18:46:24,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:24,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33055841] [2020-04-17 18:46:24,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197612177] [2020-04-17 18:46:24,191 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:24,234 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:24,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:24,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:24,235 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:24,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:24,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:24,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649910801] [2020-04-17 18:46:24,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:24,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:24,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:24,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:24,369 INFO L87 Difference]: Start difference. First operand 201 states and 507 transitions. Second operand 17 states. [2020-04-17 18:46:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:24,870 INFO L93 Difference]: Finished difference Result 330 states and 763 transitions. [2020-04-17 18:46:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:46:24,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:24,871 INFO L225 Difference]: With dead ends: 330 [2020-04-17 18:46:24,871 INFO L226 Difference]: Without dead ends: 323 [2020-04-17 18:46:24,872 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:46:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-04-17 18:46:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 206. [2020-04-17 18:46:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-04-17 18:46:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 519 transitions. [2020-04-17 18:46:24,876 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 519 transitions. Word has length 14 [2020-04-17 18:46:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:24,876 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 519 transitions. [2020-04-17 18:46:24,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 519 transitions. [2020-04-17 18:46:24,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:24,876 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:24,877 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:25,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:25,077 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:25,078 INFO L82 PathProgramCache]: Analyzing trace with hash 95314878, now seen corresponding path program 180 times [2020-04-17 18:46:25,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:25,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269150004] [2020-04-17 18:46:25,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:25,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269150004] [2020-04-17 18:46:25,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197082135] [2020-04-17 18:46:25,152 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:25,195 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:25,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:25,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:25,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:25,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:25,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:25,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938914058] [2020-04-17 18:46:25,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:25,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:25,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:25,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:25,319 INFO L87 Difference]: Start difference. First operand 206 states and 519 transitions. Second operand 17 states. [2020-04-17 18:46:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:25,741 INFO L93 Difference]: Finished difference Result 312 states and 731 transitions. [2020-04-17 18:46:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:46:25,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:25,742 INFO L225 Difference]: With dead ends: 312 [2020-04-17 18:46:25,742 INFO L226 Difference]: Without dead ends: 310 [2020-04-17 18:46:25,743 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:46:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-04-17 18:46:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 204. [2020-04-17 18:46:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-04-17 18:46:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 514 transitions. [2020-04-17 18:46:25,747 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 514 transitions. Word has length 14 [2020-04-17 18:46:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:25,747 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 514 transitions. [2020-04-17 18:46:25,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 514 transitions. [2020-04-17 18:46:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:25,748 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:25,748 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:25,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:25,948 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 181 times [2020-04-17 18:46:25,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:25,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748263892] [2020-04-17 18:46:25,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:26,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748263892] [2020-04-17 18:46:26,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915451025] [2020-04-17 18:46:26,025 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:26,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:26,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:26,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:26,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:26,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977515842] [2020-04-17 18:46:26,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:26,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:26,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:26,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:26,179 INFO L87 Difference]: Start difference. First operand 204 states and 514 transitions. Second operand 17 states. [2020-04-17 18:46:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:26,777 INFO L93 Difference]: Finished difference Result 294 states and 696 transitions. [2020-04-17 18:46:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:46:26,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:26,778 INFO L225 Difference]: With dead ends: 294 [2020-04-17 18:46:26,778 INFO L226 Difference]: Without dead ends: 292 [2020-04-17 18:46:26,779 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:46:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-04-17 18:46:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 206. [2020-04-17 18:46:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-04-17 18:46:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 522 transitions. [2020-04-17 18:46:26,783 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 522 transitions. Word has length 14 [2020-04-17 18:46:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:26,783 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 522 transitions. [2020-04-17 18:46:26,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 522 transitions. [2020-04-17 18:46:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:26,783 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:26,784 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:26,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:26,984 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash 115841838, now seen corresponding path program 182 times [2020-04-17 18:46:26,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:26,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786947880] [2020-04-17 18:46:26,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786947880] [2020-04-17 18:46:27,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171698917] [2020-04-17 18:46:27,057 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:27,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:27,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:27,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:27,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:27,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:27,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230816002] [2020-04-17 18:46:27,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:27,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:27,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:27,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:27,224 INFO L87 Difference]: Start difference. First operand 206 states and 522 transitions. Second operand 17 states. [2020-04-17 18:46:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:27,809 INFO L93 Difference]: Finished difference Result 315 states and 742 transitions. [2020-04-17 18:46:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 18:46:27,809 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:27,810 INFO L225 Difference]: With dead ends: 315 [2020-04-17 18:46:27,810 INFO L226 Difference]: Without dead ends: 313 [2020-04-17 18:46:27,811 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 18:46:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-04-17 18:46:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 208. [2020-04-17 18:46:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-04-17 18:46:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 528 transitions. [2020-04-17 18:46:27,815 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 528 transitions. Word has length 14 [2020-04-17 18:46:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:27,816 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 528 transitions. [2020-04-17 18:46:27,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 528 transitions. [2020-04-17 18:46:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:27,816 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:27,816 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:28,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:28,018 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:28,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:28,018 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 183 times [2020-04-17 18:46:28,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:28,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193381463] [2020-04-17 18:46:28,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:28,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193381463] [2020-04-17 18:46:28,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235220794] [2020-04-17 18:46:28,094 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:28,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:28,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:28,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:28,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:28,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:28,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:28,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804905020] [2020-04-17 18:46:28,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:28,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:28,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:28,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:28,259 INFO L87 Difference]: Start difference. First operand 208 states and 528 transitions. Second operand 17 states. [2020-04-17 18:46:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:28,864 INFO L93 Difference]: Finished difference Result 287 states and 693 transitions. [2020-04-17 18:46:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:46:28,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:28,866 INFO L225 Difference]: With dead ends: 287 [2020-04-17 18:46:28,866 INFO L226 Difference]: Without dead ends: 285 [2020-04-17 18:46:28,866 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 18:46:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-04-17 18:46:28,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 210. [2020-04-17 18:46:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-04-17 18:46:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 535 transitions. [2020-04-17 18:46:28,870 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 535 transitions. Word has length 14 [2020-04-17 18:46:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:28,870 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 535 transitions. [2020-04-17 18:46:28,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 535 transitions. [2020-04-17 18:46:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:28,871 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:28,871 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:29,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:29,072 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:29,072 INFO L82 PathProgramCache]: Analyzing trace with hash 116525326, now seen corresponding path program 184 times [2020-04-17 18:46:29,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:29,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463973858] [2020-04-17 18:46:29,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463973858] [2020-04-17 18:46:29,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701668280] [2020-04-17 18:46:29,144 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:29,186 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:29,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:29,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:29,187 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:29,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:29,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:29,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072953412] [2020-04-17 18:46:29,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:29,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:29,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:29,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:29,296 INFO L87 Difference]: Start difference. First operand 210 states and 535 transitions. Second operand 17 states. [2020-04-17 18:46:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:29,849 INFO L93 Difference]: Finished difference Result 271 states and 669 transitions. [2020-04-17 18:46:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:46:29,849 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:29,850 INFO L225 Difference]: With dead ends: 271 [2020-04-17 18:46:29,850 INFO L226 Difference]: Without dead ends: 266 [2020-04-17 18:46:29,851 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 18:46:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-04-17 18:46:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 210. [2020-04-17 18:46:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-04-17 18:46:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 535 transitions. [2020-04-17 18:46:29,855 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 535 transitions. Word has length 14 [2020-04-17 18:46:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:29,855 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 535 transitions. [2020-04-17 18:46:29,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 535 transitions. [2020-04-17 18:46:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:29,855 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:29,855 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:30,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:30,056 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash 116526287, now seen corresponding path program 185 times [2020-04-17 18:46:30,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:30,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7985457] [2020-04-17 18:46:30,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:30,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7985457] [2020-04-17 18:46:30,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305135387] [2020-04-17 18:46:30,138 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:30,180 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:46:30,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:30,182 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:30,182 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:30,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:30,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:30,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:30,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096913370] [2020-04-17 18:46:30,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:30,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:30,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:30,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:30,284 INFO L87 Difference]: Start difference. First operand 210 states and 535 transitions. Second operand 17 states. [2020-04-17 18:46:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:31,022 INFO L93 Difference]: Finished difference Result 321 states and 790 transitions. [2020-04-17 18:46:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:46:31,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:31,023 INFO L225 Difference]: With dead ends: 321 [2020-04-17 18:46:31,024 INFO L226 Difference]: Without dead ends: 316 [2020-04-17 18:46:31,024 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 18:46:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-04-17 18:46:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 208. [2020-04-17 18:46:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-04-17 18:46:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 528 transitions. [2020-04-17 18:46:31,027 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 528 transitions. Word has length 14 [2020-04-17 18:46:31,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:31,028 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 528 transitions. [2020-04-17 18:46:31,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 528 transitions. [2020-04-17 18:46:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:31,028 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:31,029 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:31,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:31,232 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:31,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:31,232 INFO L82 PathProgramCache]: Analyzing trace with hash 116533758, now seen corresponding path program 186 times [2020-04-17 18:46:31,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:31,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919173873] [2020-04-17 18:46:31,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919173873] [2020-04-17 18:46:31,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220679593] [2020-04-17 18:46:31,305 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:31,346 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:46:31,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:31,347 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:31,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:31,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:31,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599492345] [2020-04-17 18:46:31,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:31,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:31,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:31,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:31,471 INFO L87 Difference]: Start difference. First operand 208 states and 528 transitions. Second operand 17 states. [2020-04-17 18:46:32,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:32,153 INFO L93 Difference]: Finished difference Result 326 states and 785 transitions. [2020-04-17 18:46:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:46:32,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:32,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:32,154 INFO L225 Difference]: With dead ends: 326 [2020-04-17 18:46:32,154 INFO L226 Difference]: Without dead ends: 324 [2020-04-17 18:46:32,154 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 18:46:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-04-17 18:46:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 212. [2020-04-17 18:46:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-04-17 18:46:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 542 transitions. [2020-04-17 18:46:32,158 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 542 transitions. Word has length 14 [2020-04-17 18:46:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:32,158 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 542 transitions. [2020-04-17 18:46:32,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 542 transitions. [2020-04-17 18:46:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:32,159 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:32,159 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:32,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,360 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:32,361 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 187 times [2020-04-17 18:46:32,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:32,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228626712] [2020-04-17 18:46:32,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228626712] [2020-04-17 18:46:32,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290691587] [2020-04-17 18:46:32,436 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:32,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:33,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:33,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:33,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655009429] [2020-04-17 18:46:33,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:33,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:33,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:33,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:33,800 INFO L87 Difference]: Start difference. First operand 212 states and 542 transitions. Second operand 17 states. Received shutdown request... [2020-04-17 18:46:34,437 WARN L192 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-04-17 18:46:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:34,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,639 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 18:46:34,644 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 18:46:34,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:46:34 BasicIcfg [2020-04-17 18:46:34,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 18:46:34,645 INFO L168 Benchmark]: Toolchain (without parser) took 288987.79 ms. Allocated memory was 137.9 MB in the beginning and 192.9 MB in the end (delta: 55.1 MB). Free memory was 100.4 MB in the beginning and 126.3 MB in the end (delta: -25.9 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,645 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 137.9 MB. Free memory is still 119.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-04-17 18:46:34,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.57 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 98.6 MB in the beginning and 161.7 MB in the end (delta: -63.1 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,646 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.06 ms. Allocated memory is still 202.4 MB. Free memory was 161.7 MB in the beginning and 159.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,646 INFO L168 Benchmark]: Boogie Preprocessor took 27.41 ms. Allocated memory is still 202.4 MB. Free memory was 159.7 MB in the beginning and 157.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,647 INFO L168 Benchmark]: RCFGBuilder took 425.31 ms. Allocated memory is still 202.4 MB. Free memory was 157.7 MB in the beginning and 137.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,647 INFO L168 Benchmark]: TraceAbstraction took 287803.65 ms. Allocated memory was 202.4 MB in the beginning and 192.9 MB in the end (delta: -9.4 MB). Free memory was 137.4 MB in the beginning and 126.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:34,648 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 137.9 MB. Free memory is still 119.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 658.57 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 98.6 MB in the beginning and 161.7 MB in the end (delta: -63.1 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.06 ms. Allocated memory is still 202.4 MB. Free memory was 161.7 MB in the beginning and 159.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.41 ms. Allocated memory is still 202.4 MB. Free memory was 159.7 MB in the beginning and 157.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.31 ms. Allocated memory is still 202.4 MB. Free memory was 157.7 MB in the beginning and 137.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 287803.65 ms. Allocated memory was 202.4 MB in the beginning and 192.9 MB in the end (delta: -9.4 MB). Free memory was 137.4 MB in the beginning and 126.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 553 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 879 CheckedPairsTotal, 48 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (212states) and FLOYD_HOARE automaton (currently 12 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (34 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 287.6s, OverallIterations: 215, TraceHistogramMax: 6, AutomataDifference: 111.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 2841 SDtfs, 22107 SDslu, 19663 SDs, 0 SdLazy, 14109 SolverSat, 5853 SolverUnsat, 32 SolverUnknown, 0 SolverNotchecked, 46.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5783 GetRequests, 1020 SyntacticMatches, 203 SemanticMatches, 4560 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26448 ImplicationChecksByTransitivity, 176.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=214, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 214 MinimizatonAttempts, 11572 StatesRemovedByMinimization, 213 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 3.2s SatisfiabilityAnalysisTime, 120.0s InterpolantComputationTime, 5382 NumberOfCodeBlocks, 5382 NumberOfCodeBlocksAsserted, 656 NumberOfCheckSat, 4960 ConstructedInterpolants, 85 QuantifiedInterpolants, 533305 SizeOfPredicates, 206 NumberOfNonLiveVariables, 18224 ConjunctsInSsa, 2055 ConjunctsInUnsatCore, 422 InterpolantComputations, 9 PerfectInterpolantSequences, 35/2116 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown