/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 14:26:04,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 14:26:04,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 14:26:04,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 14:26:04,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 14:26:04,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 14:26:04,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 14:26:04,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 14:26:04,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 14:26:04,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 14:26:04,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 14:26:04,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 14:26:04,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 14:26:04,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 14:26:04,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 14:26:04,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 14:26:04,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 14:26:04,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 14:26:04,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 14:26:04,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 14:26:04,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 14:26:04,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 14:26:04,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 14:26:04,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 14:26:04,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 14:26:04,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 14:26:04,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 14:26:04,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 14:26:04,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 14:26:04,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 14:26:04,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 14:26:04,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 14:26:04,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 14:26:04,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 14:26:04,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 14:26:04,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 14:26:04,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 14:26:04,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 14:26:04,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 14:26:04,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 14:26:04,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 14:26:04,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-04-17 14:26:04,554 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 14:26:04,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 14:26:04,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 14:26:04,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 14:26:04,557 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 14:26:04,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 14:26:04,557 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 14:26:04,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 14:26:04,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 14:26:04,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 14:26:04,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 14:26:04,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 14:26:04,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 14:26:04,559 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 14:26:04,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 14:26:04,560 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 14:26:04,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 14:26:04,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 14:26:04,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 14:26:04,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 14:26:04,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 14:26:04,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 14:26:04,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 14:26:04,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 14:26:04,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 14:26:04,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 14:26:04,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 14:26:04,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 14:26:04,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-04-17 14:26:04,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 14:26:04,906 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 14:26:04,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 14:26:04,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 14:26:04,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 14:26:04,934 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 14:26:04,935 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2020-04-17 14:26:05,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ffdb1b6b/4f64eee565a346f1abf40d93067d1a66/FLAG2694d989e [2020-04-17 14:26:05,538 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 14:26:05,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2020-04-17 14:26:05,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ffdb1b6b/4f64eee565a346f1abf40d93067d1a66/FLAG2694d989e [2020-04-17 14:26:05,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ffdb1b6b/4f64eee565a346f1abf40d93067d1a66 [2020-04-17 14:26:05,869 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 14:26:05,886 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 14:26:05,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 14:26:05,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 14:26:05,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 14:26:05,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 02:26:05" (1/1) ... [2020-04-17 14:26:05,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ccf62d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:05, skipping insertion in model container [2020-04-17 14:26:05,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 02:26:05" (1/1) ... [2020-04-17 14:26:05,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 14:26:05,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 14:26:06,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 14:26:06,511 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 14:26:06,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 14:26:06,646 INFO L208 MainTranslator]: Completed translation [2020-04-17 14:26:06,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06 WrapperNode [2020-04-17 14:26:06,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 14:26:06,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 14:26:06,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 14:26:06,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 14:26:06,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06" (1/1) ... [2020-04-17 14:26:06,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06" (1/1) ... [2020-04-17 14:26:06,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 14:26:06,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 14:26:06,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 14:26:06,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 14:26:06,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06" (1/1) ... [2020-04-17 14:26:06,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06" (1/1) ... [2020-04-17 14:26:06,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06" (1/1) ... [2020-04-17 14:26:06,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06" (1/1) ... [2020-04-17 14:26:06,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06" (1/1) ... [2020-04-17 14:26:06,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06" (1/1) ... [2020-04-17 14:26:06,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06" (1/1) ... [2020-04-17 14:26:06,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 14:26:06,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 14:26:06,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 14:26:06,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 14:26:06,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06" (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 14:26:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 14:26:06,836 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 14:26:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 14:26:06,836 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 14:26:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 14:26:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 14:26:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 14:26:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 14:26:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 14:26:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 14:26:06,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 14:26:06,840 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 14:26:07,218 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 14:26:07,218 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 14:26:07,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 02:26:07 BoogieIcfgContainer [2020-04-17 14:26:07,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 14:26:07,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 14:26:07,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 14:26:07,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 14:26:07,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 02:26:05" (1/3) ... [2020-04-17 14:26:07,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bddf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 02:26:07, skipping insertion in model container [2020-04-17 14:26:07,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:26:06" (2/3) ... [2020-04-17 14:26:07,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bddf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 02:26:07, skipping insertion in model container [2020-04-17 14:26:07,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 02:26:07" (3/3) ... [2020-04-17 14:26:07,232 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2020-04-17 14:26:07,245 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 14:26:07,246 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 14:26:07,256 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 14:26:07,257 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 14:26:07,289 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,290 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,290 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,290 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,291 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,291 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,291 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,292 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,292 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,292 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,293 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,293 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,293 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,293 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,294 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,294 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,294 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,295 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,295 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,295 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,296 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,296 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,296 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,296 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,297 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,297 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,297 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,298 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,298 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,298 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,302 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,302 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,303 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,303 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,303 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,303 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,309 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,309 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,310 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,310 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,310 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,310 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:26:07,324 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 14:26:07,342 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 14:26:07,342 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 14:26:07,342 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 14:26:07,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 14:26:07,342 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 14:26:07,342 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 14:26:07,343 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 14:26:07,343 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 14:26:07,356 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-17 14:26:07,358 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 14:26:07,397 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 14:26:07,397 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 14:26:07,403 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 14:26:07,407 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 14:26:07,427 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 14:26:07,428 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 14:26:07,429 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 14:26:07,431 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-17 14:26:07,433 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 14:26:08,703 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-17 14:26:08,807 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-17 14:26:08,807 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-17 14:26:08,811 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-17 14:26:08,824 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 14:26:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 14:26:08,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 14:26:08,834 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:08,835 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 14:26:08,835 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-17 14:26:08,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:08,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210216515] [2020-04-17 14:26:08,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:09,104 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 14:26:09,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210216515] [2020-04-17 14:26:09,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:26:09,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 14:26:09,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5828583] [2020-04-17 14:26:09,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 14:26:09,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:09,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 14:26:09,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 14:26:09,138 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 14:26:09,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:09,251 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-17 14:26:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 14:26:09,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 14:26:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:09,273 INFO L225 Difference]: With dead ends: 83 [2020-04-17 14:26:09,273 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 14:26:09,275 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 14:26:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 14:26:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-17 14:26:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 14:26:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-17 14:26:09,320 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-17 14:26:09,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:09,320 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-17 14:26:09,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 14:26:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-17 14:26:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 14:26:09,322 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:09,323 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:09,323 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:09,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:09,324 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-17 14:26:09,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:09,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346775246] [2020-04-17 14:26:09,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:09,439 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 14:26:09,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346775246] [2020-04-17 14:26:09,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:26:09,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 14:26:09,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13257063] [2020-04-17 14:26:09,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 14:26:09,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 14:26:09,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 14:26:09,443 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-04-17 14:26:09,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:09,521 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-17 14:26:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 14:26:09,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 14:26:09,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:09,524 INFO L225 Difference]: With dead ends: 80 [2020-04-17 14:26:09,524 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 14:26:09,525 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 14:26:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 14:26:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-17 14:26:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 14:26:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-17 14:26:09,535 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-17 14:26:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:09,537 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-17 14:26:09,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 14:26:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-17 14:26:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 14:26:09,538 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:09,538 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:09,538 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:09,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:09,539 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-17 14:26:09,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:09,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372266956] [2020-04-17 14:26:09,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:09,633 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 14:26:09,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372266956] [2020-04-17 14:26:09,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:26:09,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 14:26:09,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885134706] [2020-04-17 14:26:09,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 14:26:09,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:09,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 14:26:09,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 14:26:09,636 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-04-17 14:26:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:09,664 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-04-17 14:26:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 14:26:09,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 14:26:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:09,666 INFO L225 Difference]: With dead ends: 73 [2020-04-17 14:26:09,667 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 14:26:09,667 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 14:26:09,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 14:26:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-04-17 14:26:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 14:26:09,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-04-17 14:26:09,677 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-04-17 14:26:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:09,677 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-04-17 14:26:09,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 14:26:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-04-17 14:26:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 14:26:09,678 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:09,679 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:09,679 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:09,679 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-04-17 14:26:09,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:09,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306708668] [2020-04-17 14:26:09,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:09,795 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 14:26:09,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306708668] [2020-04-17 14:26:09,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:26:09,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 14:26:09,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439437622] [2020-04-17 14:26:09,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 14:26:09,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:09,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 14:26:09,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 14:26:09,798 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-04-17 14:26:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:09,867 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-04-17 14:26:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 14:26:09,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 14:26:09,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:09,868 INFO L225 Difference]: With dead ends: 86 [2020-04-17 14:26:09,869 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 14:26:09,869 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 14:26:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 14:26:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-04-17 14:26:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 14:26:09,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-17 14:26:09,878 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-17 14:26:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:09,879 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-17 14:26:09,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 14:26:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-17 14:26:09,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 14:26:09,880 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:09,880 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:09,880 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:09,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-04-17 14:26:09,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:09,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218860915] [2020-04-17 14:26:09,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:09,964 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 14:26:09,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218860915] [2020-04-17 14:26:09,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177142473] [2020-04-17 14:26:09,965 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 14:26:10,040 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:10,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:10,042 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:26:10,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:10,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:10,128 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 14:26:10,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:10,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-17 14:26:10,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118288266] [2020-04-17 14:26:10,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:26:10,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:10,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:26:10,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:26:10,133 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-04-17 14:26:10,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:10,269 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-17 14:26:10,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:26:10,269 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-04-17 14:26:10,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:10,271 INFO L225 Difference]: With dead ends: 101 [2020-04-17 14:26:10,271 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 14:26:10,271 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 14:26:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 14:26:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-17 14:26:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 14:26:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-17 14:26:10,281 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-17 14:26:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:10,282 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-17 14:26:10,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:26:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-17 14:26:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 14:26:10,283 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:10,284 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:10,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:10,489 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:10,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:10,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-17 14:26:10,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:10,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997592655] [2020-04-17 14:26:10,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:10,610 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 14:26:10,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997592655] [2020-04-17 14:26:10,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408393568] [2020-04-17 14:26:10,611 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 14:26:10,661 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:26:10,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:10,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:26:10,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:10,750 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 14:26:10,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:10,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 14:26:10,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185750970] [2020-04-17 14:26:10,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:26:10,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:10,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:26:10,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:26:10,752 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-04-17 14:26:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:10,811 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 14:26:10,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 14:26:10,811 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 14:26:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:10,812 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:26:10,813 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 14:26:10,813 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:26:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 14:26:10,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-04-17 14:26:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:26:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-04-17 14:26:10,821 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-04-17 14:26:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:10,821 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-04-17 14:26:10,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:26:10,821 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-04-17 14:26:10,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 14:26:10,822 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:10,823 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:11,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:11,027 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:11,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-04-17 14:26:11,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:11,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89962437] [2020-04-17 14:26:11,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:11,116 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 14:26:11,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89962437] [2020-04-17 14:26:11,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973972549] [2020-04-17 14:26:11,117 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 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 14:26:11,167 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:11,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:11,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:26:11,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:11,229 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 14:26:11,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:11,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 14:26:11,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810631481] [2020-04-17 14:26:11,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:26:11,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:26:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:26:11,232 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-04-17 14:26:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:11,287 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-04-17 14:26:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 14:26:11,287 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 14:26:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:11,288 INFO L225 Difference]: With dead ends: 90 [2020-04-17 14:26:11,288 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 14:26:11,289 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 14:26:11,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 14:26:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-04-17 14:26:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:26:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-04-17 14:26:11,296 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-04-17 14:26:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:11,296 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-04-17 14:26:11,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:26:11,296 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-04-17 14:26:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 14:26:11,297 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:11,297 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:11,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:11,498 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:11,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:11,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-04-17 14:26:11,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:11,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635557041] [2020-04-17 14:26:11,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:11,576 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 14:26:11,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635557041] [2020-04-17 14:26:11,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959662948] [2020-04-17 14:26:11,579 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 14:26:11,632 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:11,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:11,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:26:11,635 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:11,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:11,715 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 14:26:11,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:11,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 14:26:11,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871866257] [2020-04-17 14:26:11,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:26:11,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:11,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:26:11,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:26:11,718 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-04-17 14:26:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:11,823 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 14:26:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:26:11,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 14:26:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:11,825 INFO L225 Difference]: With dead ends: 99 [2020-04-17 14:26:11,825 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 14:26:11,826 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 14:26:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 14:26:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-04-17 14:26:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 14:26:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-04-17 14:26:11,833 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-04-17 14:26:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:11,833 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-04-17 14:26:11,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:26:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-04-17 14:26:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:26:11,835 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:11,835 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:12,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:12,039 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:12,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-17 14:26:12,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:12,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556771819] [2020-04-17 14:26:12,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:12,119 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 14:26:12,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556771819] [2020-04-17 14:26:12,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:26:12,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 14:26:12,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820265226] [2020-04-17 14:26:12,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:26:12,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:12,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:26:12,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:26:12,122 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-04-17 14:26:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:12,159 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-04-17 14:26:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 14:26:12,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 14:26:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:12,161 INFO L225 Difference]: With dead ends: 92 [2020-04-17 14:26:12,161 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 14:26:12,162 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 14:26:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 14:26:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-04-17 14:26:12,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 14:26:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-04-17 14:26:12,168 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-04-17 14:26:12,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:12,169 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-04-17 14:26:12,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:26:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-04-17 14:26:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:26:12,170 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:12,170 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:12,170 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-04-17 14:26:12,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:12,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044413386] [2020-04-17 14:26:12,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:12,231 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 14:26:12,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044413386] [2020-04-17 14:26:12,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:26:12,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 14:26:12,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351923678] [2020-04-17 14:26:12,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:26:12,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:12,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:26:12,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:26:12,233 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-04-17 14:26:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:12,350 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-04-17 14:26:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 14:26:12,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 14:26:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:12,351 INFO L225 Difference]: With dead ends: 100 [2020-04-17 14:26:12,351 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 14:26:12,352 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 14:26:12,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 14:26:12,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-04-17 14:26:12,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 14:26:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-04-17 14:26:12,357 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-04-17 14:26:12,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:12,358 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-04-17 14:26:12,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:26:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-04-17 14:26:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:26:12,359 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:12,359 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:12,359 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:12,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-04-17 14:26:12,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:12,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313184575] [2020-04-17 14:26:12,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:12,413 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 14:26:12,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313184575] [2020-04-17 14:26:12,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:26:12,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 14:26:12,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329793531] [2020-04-17 14:26:12,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:26:12,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:12,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:26:12,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:26:12,416 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-04-17 14:26:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:12,509 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 14:26:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:26:12,510 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 14:26:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:12,511 INFO L225 Difference]: With dead ends: 105 [2020-04-17 14:26:12,511 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 14:26:12,511 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 14:26:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 14:26:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 14:26:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:26:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-04-17 14:26:12,516 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-04-17 14:26:12,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:12,517 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-04-17 14:26:12,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:26:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-04-17 14:26:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:26:12,518 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:12,518 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:12,518 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-17 14:26:12,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:12,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260766239] [2020-04-17 14:26:12,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:12,573 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 14:26:12,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260766239] [2020-04-17 14:26:12,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:26:12,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 14:26:12,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834096757] [2020-04-17 14:26:12,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:26:12,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:26:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:26:12,576 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-04-17 14:26:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:12,658 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 14:26:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:26:12,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 14:26:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:12,659 INFO L225 Difference]: With dead ends: 105 [2020-04-17 14:26:12,660 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 14:26:12,660 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 14:26:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 14:26:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 14:26:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:26:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-04-17 14:26:12,665 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-04-17 14:26:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:12,665 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-04-17 14:26:12,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:26:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-04-17 14:26:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:26:12,666 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:12,666 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:12,667 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:12,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-04-17 14:26:12,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:12,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080681474] [2020-04-17 14:26:12,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:12,749 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 14:26:12,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080681474] [2020-04-17 14:26:12,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55392103] [2020-04-17 14:26:12,750 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 14:26:12,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:26:12,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:12,804 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:12,811 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:12,902 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:12,927 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 14:26:12,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:12,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 14:26:12,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227624346] [2020-04-17 14:26:12,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:26:12,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:12,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:26:12,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:26:12,930 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-04-17 14:26:13,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:13,065 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-04-17 14:26:13,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:26:13,067 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-04-17 14:26:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:13,068 INFO L225 Difference]: With dead ends: 122 [2020-04-17 14:26:13,068 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 14:26:13,069 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 14:26:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 14:26:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-04-17 14:26:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 14:26:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-04-17 14:26:13,073 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-04-17 14:26:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:13,074 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-04-17 14:26:13,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:26:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-04-17 14:26:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:26:13,075 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:13,075 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:13,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:13,284 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:13,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:13,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-17 14:26:13,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:13,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681605516] [2020-04-17 14:26:13,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:13,375 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 14:26:13,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681605516] [2020-04-17 14:26:13,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754763795] [2020-04-17 14:26:13,376 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 14:26:13,421 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:26:13,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:13,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:13,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:13,504 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 14:26:13,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:13,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:13,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655654964] [2020-04-17 14:26:13,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:13,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:13,506 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-04-17 14:26:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:13,546 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 14:26:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 14:26:13,547 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 14:26:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:13,548 INFO L225 Difference]: With dead ends: 108 [2020-04-17 14:26:13,548 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 14:26:13,549 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 14:26:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 14:26:13,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-04-17 14:26:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 14:26:13,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-04-17 14:26:13,557 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-04-17 14:26:13,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:13,558 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-04-17 14:26:13,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:13,558 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-04-17 14:26:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:26:13,558 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:13,559 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:13,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:13,768 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:13,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-04-17 14:26:13,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:13,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017294734] [2020-04-17 14:26:13,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:13,858 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 14:26:13,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017294734] [2020-04-17 14:26:13,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496343323] [2020-04-17 14:26:13,859 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 14:26:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:13,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:13,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:13,985 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 14:26:13,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:13,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:13,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368705306] [2020-04-17 14:26:13,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:13,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:13,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:13,987 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-04-17 14:26:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:14,062 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-04-17 14:26:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:26:14,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 14:26:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:14,064 INFO L225 Difference]: With dead ends: 116 [2020-04-17 14:26:14,064 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:26:14,064 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 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 14:26:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:26:14,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-04-17 14:26:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:26:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-04-17 14:26:14,069 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-04-17 14:26:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:14,070 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-04-17 14:26:14,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-04-17 14:26:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:26:14,071 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:14,071 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:14,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:14,280 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:14,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-04-17 14:26:14,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:14,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397102752] [2020-04-17 14:26:14,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:14,385 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 14:26:14,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397102752] [2020-04-17 14:26:14,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897259577] [2020-04-17 14:26:14,386 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 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 14:26:14,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:14,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:14,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:14,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:14,502 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 14:26:14,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:14,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:14,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674884443] [2020-04-17 14:26:14,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:14,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:14,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:14,504 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-04-17 14:26:14,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:14,589 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-04-17 14:26:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:26:14,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 14:26:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:14,591 INFO L225 Difference]: With dead ends: 115 [2020-04-17 14:26:14,591 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 14:26:14,591 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 14:26:14,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 14:26:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-04-17 14:26:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 14:26:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-04-17 14:26:14,596 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-04-17 14:26:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:14,597 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-04-17 14:26:14,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-04-17 14:26:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:26:14,598 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:14,598 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:14,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:14,802 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-04-17 14:26:14,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:14,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184119095] [2020-04-17 14:26:14,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:14,861 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 14:26:14,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184119095] [2020-04-17 14:26:14,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512843366] [2020-04-17 14:26:14,862 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 14:26:14,905 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:26:14,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:14,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:14,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:14,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:14,974 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 14:26:14,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:14,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:14,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126246621] [2020-04-17 14:26:14,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:14,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:14,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:14,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:14,976 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-04-17 14:26:15,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:15,109 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-04-17 14:26:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:26:15,110 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 14:26:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:15,111 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:26:15,111 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 14:26:15,111 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 14:26:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 14:26:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-04-17 14:26:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 14:26:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-04-17 14:26:15,116 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-04-17 14:26:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:15,117 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-04-17 14:26:15,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:15,117 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-04-17 14:26:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:15,117 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:15,118 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:15,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:15,323 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:15,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-17 14:26:15,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:15,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115302914] [2020-04-17 14:26:15,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:15,394 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 14:26:15,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115302914] [2020-04-17 14:26:15,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008973317] [2020-04-17 14:26:15,394 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 14:26:15,445 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:15,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:15,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:15,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:15,543 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 14:26:15,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:15,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:15,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428791523] [2020-04-17 14:26:15,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:15,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:15,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:15,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:15,545 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-04-17 14:26:15,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:15,585 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-04-17 14:26:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 14:26:15,585 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:15,586 INFO L225 Difference]: With dead ends: 113 [2020-04-17 14:26:15,586 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 14:26:15,587 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 14:26:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 14:26:15,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-04-17 14:26:15,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 14:26:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-04-17 14:26:15,590 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-04-17 14:26:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:15,591 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-04-17 14:26:15,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-04-17 14:26:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:15,591 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:15,592 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:15,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:15,795 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:15,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-04-17 14:26:15,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:15,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285016453] [2020-04-17 14:26:15,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:15,869 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 14:26:15,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285016453] [2020-04-17 14:26:15,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863478729] [2020-04-17 14:26:15,870 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:26:15,914 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:26:15,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:15,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:15,917 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:26:15,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:15,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:15,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980935319] [2020-04-17 14:26:15,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:15,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:15,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:15,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:15,987 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-04-17 14:26:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:16,076 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-04-17 14:26:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:26:16,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:16,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:16,078 INFO L225 Difference]: With dead ends: 118 [2020-04-17 14:26:16,078 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 14:26:16,078 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 14:26:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 14:26:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-04-17 14:26:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 14:26:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-04-17 14:26:16,081 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-04-17 14:26:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:16,081 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-04-17 14:26:16,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-04-17 14:26:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:16,082 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:16,082 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:16,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:16,287 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:16,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:16,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-04-17 14:26:16,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:16,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504104176] [2020-04-17 14:26:16,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:16,363 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 14:26:16,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504104176] [2020-04-17 14:26:16,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939225432] [2020-04-17 14:26:16,364 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 14:26:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:16,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:16,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:16,491 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 14:26:16,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:16,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:16,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671095073] [2020-04-17 14:26:16,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:16,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:16,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:16,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:16,492 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-04-17 14:26:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:16,584 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-04-17 14:26:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:26:16,584 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:16,585 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:26:16,586 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 14:26:16,586 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 14:26:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 14:26:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-04-17 14:26:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:26:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-04-17 14:26:16,590 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-04-17 14:26:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:16,591 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-04-17 14:26:16,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-04-17 14:26:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:16,592 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:16,592 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:16,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:16,796 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-04-17 14:26:16,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:16,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687518389] [2020-04-17 14:26:16,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:16,920 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 14:26:16,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687518389] [2020-04-17 14:26:16,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636291277] [2020-04-17 14:26:16,921 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 14:26:16,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:17,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:17,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:17,005 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:17,110 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 14:26:17,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:17,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:17,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868608695] [2020-04-17 14:26:17,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:17,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:17,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:17,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:17,113 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-04-17 14:26:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:17,197 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-04-17 14:26:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:26:17,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:17,200 INFO L225 Difference]: With dead ends: 122 [2020-04-17 14:26:17,200 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 14:26:17,201 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 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 14:26:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 14:26:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-04-17 14:26:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-04-17 14:26:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-04-17 14:26:17,208 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-04-17 14:26:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:17,209 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-04-17 14:26:17,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-04-17 14:26:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:17,210 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:17,211 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:17,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:17,416 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-04-17 14:26:17,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:17,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913212730] [2020-04-17 14:26:17,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:17,543 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 14:26:17,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913212730] [2020-04-17 14:26:17,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416607666] [2020-04-17 14:26:17,544 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 14:26:17,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:26:17,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:17,593 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:17,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:17,676 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 14:26:17,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:17,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:17,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862839741] [2020-04-17 14:26:17,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:17,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:17,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:17,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:17,678 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-04-17 14:26:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:17,781 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-04-17 14:26:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:26:17,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:17,783 INFO L225 Difference]: With dead ends: 123 [2020-04-17 14:26:17,783 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 14:26:17,783 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 14:26:17,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 14:26:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-04-17 14:26:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:26:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-04-17 14:26:17,788 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-04-17 14:26:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:17,788 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-04-17 14:26:17,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-04-17 14:26:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:17,789 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:17,789 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:17,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:17,993 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:17,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:17,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-04-17 14:26:17,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:17,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330018301] [2020-04-17 14:26:17,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:18,071 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 14:26:18,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330018301] [2020-04-17 14:26:18,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058940035] [2020-04-17 14:26:18,072 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 14:26:18,128 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:18,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:18,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:18,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:18,206 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 14:26:18,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:18,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:18,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297364740] [2020-04-17 14:26:18,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:18,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:18,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:18,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:18,208 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-04-17 14:26:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:18,294 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 14:26:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:26:18,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:18,295 INFO L225 Difference]: With dead ends: 123 [2020-04-17 14:26:18,296 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 14:26:18,296 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 14:26:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 14:26:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-04-17 14:26:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-04-17 14:26:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-04-17 14:26:18,301 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-04-17 14:26:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:18,302 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-04-17 14:26:18,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-04-17 14:26:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:18,304 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:18,304 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:18,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:18,508 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-04-17 14:26:18,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:18,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191958400] [2020-04-17 14:26:18,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:18,584 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 14:26:18,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191958400] [2020-04-17 14:26:18,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105681631] [2020-04-17 14:26:18,585 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 14:26:18,626 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:18,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:18,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:18,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:18,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:18,716 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 14:26:18,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:18,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:18,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074985495] [2020-04-17 14:26:18,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:18,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:18,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:18,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:18,718 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-04-17 14:26:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:18,902 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-04-17 14:26:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:26:18,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:18,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:18,904 INFO L225 Difference]: With dead ends: 133 [2020-04-17 14:26:18,904 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 14:26:18,905 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 14:26:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 14:26:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-04-17 14:26:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-04-17 14:26:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-04-17 14:26:18,909 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-04-17 14:26:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:18,909 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-04-17 14:26:18,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-04-17 14:26:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:18,910 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:18,910 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:19,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:19,115 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:19,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-04-17 14:26:19,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:19,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093835304] [2020-04-17 14:26:19,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:19,175 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 14:26:19,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093835304] [2020-04-17 14:26:19,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182801605] [2020-04-17 14:26:19,176 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 14:26:19,234 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:26:19,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:19,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:19,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:19,311 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 14:26:19,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:19,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:19,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291430558] [2020-04-17 14:26:19,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:19,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:19,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:19,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:19,313 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-04-17 14:26:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:19,431 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-04-17 14:26:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:26:19,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:19,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:19,432 INFO L225 Difference]: With dead ends: 127 [2020-04-17 14:26:19,432 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 14:26:19,432 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 14:26:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 14:26:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-04-17 14:26:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 14:26:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 14:26:19,438 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 14:26:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:19,438 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 14:26:19,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 14:26:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:19,439 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:19,439 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:19,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:19,643 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:19,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-04-17 14:26:19,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:19,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328974142] [2020-04-17 14:26:19,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:19,698 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 14:26:19,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328974142] [2020-04-17 14:26:19,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851964806] [2020-04-17 14:26:19,699 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 14:26:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:19,742 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:19,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:19,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:19,807 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 14:26:19,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:19,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:19,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23511435] [2020-04-17 14:26:19,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:19,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:19,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:19,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:19,809 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 14:26:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:20,052 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-04-17 14:26:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:26:20,052 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:20,053 INFO L225 Difference]: With dead ends: 141 [2020-04-17 14:26:20,053 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 14:26:20,053 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 14:26:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 14:26:20,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-04-17 14:26:20,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 14:26:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 14:26:20,058 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 14:26:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:20,059 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 14:26:20,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 14:26:20,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:20,059 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:20,060 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:20,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:20,264 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:20,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-04-17 14:26:20,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:20,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534623600] [2020-04-17 14:26:20,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:20,323 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 14:26:20,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534623600] [2020-04-17 14:26:20,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312220004] [2020-04-17 14:26:20,323 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 14:26:20,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:20,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:20,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:20,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:20,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:20,433 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 14:26:20,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:20,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:20,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642402740] [2020-04-17 14:26:20,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:20,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:20,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:20,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:20,435 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 14:26:20,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:20,608 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-04-17 14:26:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:26:20,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:20,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:20,612 INFO L225 Difference]: With dead ends: 136 [2020-04-17 14:26:20,612 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 14:26:20,613 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:26:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 14:26:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-04-17 14:26:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 14:26:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-04-17 14:26:20,617 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-04-17 14:26:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:20,618 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-04-17 14:26:20,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-04-17 14:26:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:20,619 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:20,619 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:20,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:20,827 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:20,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:20,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-04-17 14:26:20,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:20,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423730432] [2020-04-17 14:26:20,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:20,902 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 14:26:20,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423730432] [2020-04-17 14:26:20,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76442195] [2020-04-17 14:26:20,903 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 14:26:20,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:26:20,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:20,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:20,950 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:21,025 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 14:26:21,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:21,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:21,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87167592] [2020-04-17 14:26:21,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:21,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:21,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:21,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:21,029 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-04-17 14:26:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:21,136 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-04-17 14:26:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:26:21,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:21,139 INFO L225 Difference]: With dead ends: 130 [2020-04-17 14:26:21,139 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 14:26:21,140 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 14:26:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 14:26:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-04-17 14:26:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:26:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 14:26:21,144 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 14:26:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:21,144 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 14:26:21,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:21,144 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 14:26:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:21,145 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:21,145 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:21,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:21,349 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:21,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-04-17 14:26:21,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:21,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115827696] [2020-04-17 14:26:21,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:21,416 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 14:26:21,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115827696] [2020-04-17 14:26:21,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276133595] [2020-04-17 14:26:21,416 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 14:26:21,466 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:21,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:21,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:21,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:21,549 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 14:26:21,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:21,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:21,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947460410] [2020-04-17 14:26:21,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:21,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:21,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:21,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:21,551 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 14:26:21,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:21,673 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-04-17 14:26:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:26:21,673 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:21,675 INFO L225 Difference]: With dead ends: 131 [2020-04-17 14:26:21,675 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 14:26:21,675 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 14:26:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 14:26:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-04-17 14:26:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 14:26:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 14:26:21,681 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 14:26:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:21,681 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 14:26:21,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 14:26:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:21,682 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:21,682 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:21,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:21,885 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:21,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-04-17 14:26:21,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:21,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447812168] [2020-04-17 14:26:21,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:21,948 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 14:26:21,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447812168] [2020-04-17 14:26:21,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662671879] [2020-04-17 14:26:21,949 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 14:26:21,994 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:21,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:21,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:21,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:22,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:22,056 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 14:26:22,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:22,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:22,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876336866] [2020-04-17 14:26:22,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:22,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:22,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:22,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:22,059 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 14:26:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:22,232 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-04-17 14:26:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:26:22,232 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:22,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:22,233 INFO L225 Difference]: With dead ends: 131 [2020-04-17 14:26:22,234 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 14:26:22,234 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 14:26:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 14:26:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-04-17 14:26:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 14:26:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 14:26:22,238 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 14:26:22,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:22,239 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 14:26:22,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 14:26:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:22,239 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:22,240 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:22,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:22,444 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:22,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-04-17 14:26:22,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:22,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429989849] [2020-04-17 14:26:22,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:22,562 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 14:26:22,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429989849] [2020-04-17 14:26:22,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460020101] [2020-04-17 14:26:22,563 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 14:26:22,615 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:26:22,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:22,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:22,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:22,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:22,687 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 14:26:22,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:22,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:22,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447761871] [2020-04-17 14:26:22,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:22,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:22,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:22,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:22,689 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 14:26:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:22,919 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-04-17 14:26:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:26:22,919 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:22,920 INFO L225 Difference]: With dead ends: 145 [2020-04-17 14:26:22,920 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 14:26:22,921 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:26:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 14:26:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-04-17 14:26:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:26:22,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 14:26:22,926 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 14:26:22,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:22,926 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 14:26:22,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:22,926 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 14:26:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:22,927 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:22,927 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:23,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:23,130 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:23,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:23,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-04-17 14:26:23,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:23,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11626274] [2020-04-17 14:26:23,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:23,193 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 14:26:23,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11626274] [2020-04-17 14:26:23,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3542075] [2020-04-17 14:26:23,194 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 14:26:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:23,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:26:23,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:23,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:23,323 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 14:26:23,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:23,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 14:26:23,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917950211] [2020-04-17 14:26:23,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:26:23,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:23,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:26:23,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:26:23,325 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 14:26:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:23,502 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-04-17 14:26:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:26:23,502 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 14:26:23,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:23,504 INFO L225 Difference]: With dead ends: 135 [2020-04-17 14:26:23,504 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 14:26:23,505 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 14:26:23,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 14:26:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-04-17 14:26:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:26:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-04-17 14:26:23,509 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-04-17 14:26:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:23,509 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-04-17 14:26:23,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:26:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-04-17 14:26:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:23,510 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:23,510 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:23,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:23,714 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:23,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-04-17 14:26:23,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:23,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435002073] [2020-04-17 14:26:23,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:23,803 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 14:26:23,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435002073] [2020-04-17 14:26:23,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728780121] [2020-04-17 14:26:23,804 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 14:26:23,873 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:23,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:23,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:23,880 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:23,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:24,027 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 14:26:24,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:24,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 14:26:24,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522065956] [2020-04-17 14:26:24,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:26:24,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:24,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:26:24,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:26:24,030 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-04-17 14:26:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:24,181 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-04-17 14:26:24,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:24,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-04-17 14:26:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:24,183 INFO L225 Difference]: With dead ends: 143 [2020-04-17 14:26:24,183 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 14:26:24,184 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 14:26:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 14:26:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-04-17 14:26:24,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-04-17 14:26:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-04-17 14:26:24,190 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-04-17 14:26:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:24,190 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-04-17 14:26:24,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:26:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-04-17 14:26:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:24,191 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:24,191 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:24,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:24,395 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:24,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-04-17 14:26:24,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:24,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593502496] [2020-04-17 14:26:24,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:24,545 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 14:26:24,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593502496] [2020-04-17 14:26:24,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353673058] [2020-04-17 14:26:24,546 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 14:26:24,611 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:24,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:24,613 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:24,614 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:24,742 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 14:26:24,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:24,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:24,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089489670] [2020-04-17 14:26:24,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:24,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:24,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:24,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:24,745 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-04-17 14:26:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:24,803 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-04-17 14:26:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:26:24,804 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 14:26:24,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:24,805 INFO L225 Difference]: With dead ends: 132 [2020-04-17 14:26:24,805 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 14:26:24,805 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 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 14:26:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 14:26:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-04-17 14:26:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 14:26:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 14:26:24,810 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 14:26:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:24,810 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 14:26:24,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 14:26:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:24,811 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:24,811 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:25,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:25,014 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:25,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:25,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-04-17 14:26:25,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:25,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900857893] [2020-04-17 14:26:25,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:25,099 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 14:26:25,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900857893] [2020-04-17 14:26:25,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764925803] [2020-04-17 14:26:25,099 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 14:26:25,143 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:26:25,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:25,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:25,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:25,236 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 14:26:25,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:25,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:25,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764266293] [2020-04-17 14:26:25,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:25,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:25,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:25,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:25,238 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 14:26:25,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:25,302 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-04-17 14:26:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:26:25,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 14:26:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:25,303 INFO L225 Difference]: With dead ends: 143 [2020-04-17 14:26:25,303 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 14:26:25,303 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 14:26:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 14:26:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-04-17 14:26:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 14:26:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 14:26:25,307 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 14:26:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:25,307 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 14:26:25,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:25,307 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 14:26:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:25,309 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:25,310 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:25,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:25,513 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:25,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-04-17 14:26:25,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:25,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103251597] [2020-04-17 14:26:25,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:25,590 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 14:26:25,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103251597] [2020-04-17 14:26:25,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148968929] [2020-04-17 14:26:25,591 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 14:26:25,637 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:26:25,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:25,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:25,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:25,716 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 14:26:25,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:25,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:25,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634215806] [2020-04-17 14:26:25,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:25,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:25,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:25,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:25,718 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 14:26:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:25,794 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-04-17 14:26:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:26:25,794 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 14:26:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:25,796 INFO L225 Difference]: With dead ends: 142 [2020-04-17 14:26:25,796 INFO L226 Difference]: Without dead ends: 139 [2020-04-17 14:26:25,797 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 14:26:25,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-04-17 14:26:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-04-17 14:26:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-04-17 14:26:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-04-17 14:26:25,801 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-04-17 14:26:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:25,802 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-04-17 14:26:25,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-04-17 14:26:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:25,802 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:25,802 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:26,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:26,006 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:26,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:26,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-04-17 14:26:26,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:26,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845361527] [2020-04-17 14:26:26,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:26,071 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 14:26:26,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845361527] [2020-04-17 14:26:26,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978985489] [2020-04-17 14:26:26,071 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 14:26:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:26,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:26,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:26,213 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 14:26:26,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:26,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:26,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858954984] [2020-04-17 14:26:26,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:26,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:26,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:26,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:26,215 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-04-17 14:26:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:26,315 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-04-17 14:26:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:26:26,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 14:26:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:26,316 INFO L225 Difference]: With dead ends: 141 [2020-04-17 14:26:26,316 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 14:26:26,316 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:26:26,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 14:26:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-04-17 14:26:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 14:26:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-04-17 14:26:26,319 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-04-17 14:26:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:26,319 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-04-17 14:26:26,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-04-17 14:26:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:26:26,320 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:26,320 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:26,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:26,521 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:26,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-04-17 14:26:26,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:26,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241601215] [2020-04-17 14:26:26,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:26,579 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 14:26:26,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241601215] [2020-04-17 14:26:26,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491993489] [2020-04-17 14:26:26,580 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 14:26:26,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:26,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:26,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:26,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:26,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:26,705 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 14:26:26,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:26,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:26,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889838028] [2020-04-17 14:26:26,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:26,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:26,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:26,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:26,706 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-04-17 14:26:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:26,851 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 14:26:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:26,851 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 14:26:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:26,852 INFO L225 Difference]: With dead ends: 150 [2020-04-17 14:26:26,852 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 14:26:26,853 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:26:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 14:26:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-04-17 14:26:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-04-17 14:26:26,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-04-17 14:26:26,855 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-04-17 14:26:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:26,856 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-04-17 14:26:26,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:26,856 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-04-17 14:26:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:26,856 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:26,856 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:27,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:27,057 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-04-17 14:26:27,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:27,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891674163] [2020-04-17 14:26:27,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:27,146 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 14:26:27,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891674163] [2020-04-17 14:26:27,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593085613] [2020-04-17 14:26:27,147 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:26:27,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:27,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:27,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:27,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:27,350 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 14:26:27,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:27,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:27,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986591373] [2020-04-17 14:26:27,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:27,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:27,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:27,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:27,353 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-04-17 14:26:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:27,419 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-04-17 14:26:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:26:27,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:27,421 INFO L225 Difference]: With dead ends: 138 [2020-04-17 14:26:27,422 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 14:26:27,422 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 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 14:26:27,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 14:26:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-04-17 14:26:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 14:26:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-04-17 14:26:27,428 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-04-17 14:26:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:27,428 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-04-17 14:26:27,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-04-17 14:26:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:27,429 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:27,430 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:27,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:27,635 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:27,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-04-17 14:26:27,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:27,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528090346] [2020-04-17 14:26:27,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:27,718 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 14:26:27,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528090346] [2020-04-17 14:26:27,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552659556] [2020-04-17 14:26:27,719 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 14:26:27,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:26:27,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:27,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:27,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:27,887 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 14:26:27,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:27,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:27,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209996895] [2020-04-17 14:26:27,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:27,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:27,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:27,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:27,888 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-04-17 14:26:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:28,001 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-04-17 14:26:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:26:28,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:28,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:28,003 INFO L225 Difference]: With dead ends: 145 [2020-04-17 14:26:28,003 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 14:26:28,004 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 14:26:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 14:26:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-04-17 14:26:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-04-17 14:26:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-04-17 14:26:28,008 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-04-17 14:26:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:28,009 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-04-17 14:26:28,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-04-17 14:26:28,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:28,009 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:28,010 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:28,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:28,213 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:28,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-04-17 14:26:28,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:28,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152949572] [2020-04-17 14:26:28,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:28,285 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 14:26:28,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152949572] [2020-04-17 14:26:28,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608320064] [2020-04-17 14:26:28,286 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 14:26:28,331 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:28,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:28,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:28,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:28,413 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 14:26:28,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:28,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:28,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30877549] [2020-04-17 14:26:28,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:28,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:28,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:28,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:28,415 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-04-17 14:26:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:28,543 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 14:26:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:26:28,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:28,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:28,545 INFO L225 Difference]: With dead ends: 150 [2020-04-17 14:26:28,545 INFO L226 Difference]: Without dead ends: 148 [2020-04-17 14:26:28,545 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:26:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-17 14:26:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-04-17 14:26:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-04-17 14:26:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-04-17 14:26:28,549 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-04-17 14:26:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:28,549 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-04-17 14:26:28,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:28,549 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-04-17 14:26:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:28,550 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:28,550 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:28,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:28,754 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-04-17 14:26:28,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:28,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389556660] [2020-04-17 14:26:28,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:28,848 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 14:26:28,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389556660] [2020-04-17 14:26:28,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339890791] [2020-04-17 14:26:28,849 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 14:26:28,897 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:26:28,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:28,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:28,899 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:28,984 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 14:26:28,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:28,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:28,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679033113] [2020-04-17 14:26:28,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:28,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:28,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:28,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:28,986 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-04-17 14:26:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:29,085 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-04-17 14:26:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:26:29,086 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:29,086 INFO L225 Difference]: With dead ends: 148 [2020-04-17 14:26:29,087 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 14:26:29,087 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 14:26:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 14:26:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-04-17 14:26:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 14:26:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 14:26:29,090 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 14:26:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:29,090 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 14:26:29,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 14:26:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:29,092 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:29,092 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:29,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:29,295 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:29,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-04-17 14:26:29,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:29,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740863679] [2020-04-17 14:26:29,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:29,367 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 14:26:29,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740863679] [2020-04-17 14:26:29,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101220941] [2020-04-17 14:26:29,368 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 14:26:29,409 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:26:29,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:29,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:29,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:29,507 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 14:26:29,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:29,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:29,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977133267] [2020-04-17 14:26:29,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:29,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:29,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:29,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:29,509 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 14:26:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:29,625 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-04-17 14:26:29,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:26:29,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:29,627 INFO L225 Difference]: With dead ends: 149 [2020-04-17 14:26:29,627 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 14:26:29,628 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 14:26:29,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 14:26:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-04-17 14:26:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 14:26:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-04-17 14:26:29,632 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-04-17 14:26:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:29,633 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-04-17 14:26:29,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-04-17 14:26:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:29,634 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:29,634 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:29,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:29,837 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:29,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-04-17 14:26:29,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:29,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370786072] [2020-04-17 14:26:29,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:29,926 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 14:26:29,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370786072] [2020-04-17 14:26:29,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454042913] [2020-04-17 14:26:29,926 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 14:26:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:29,969 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:29,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:30,105 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 14:26:30,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:30,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:30,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623629394] [2020-04-17 14:26:30,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:30,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:30,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:30,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:30,107 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-04-17 14:26:30,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:30,176 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-04-17 14:26:30,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:26:30,176 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:30,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:30,177 INFO L225 Difference]: With dead ends: 152 [2020-04-17 14:26:30,177 INFO L226 Difference]: Without dead ends: 150 [2020-04-17 14:26:30,178 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:26:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-04-17 14:26:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-04-17 14:26:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 14:26:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-04-17 14:26:30,182 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-04-17 14:26:30,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:30,182 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-04-17 14:26:30,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-04-17 14:26:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:30,183 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:30,183 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:30,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:30,384 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:30,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-04-17 14:26:30,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:30,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434382110] [2020-04-17 14:26:30,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:30,471 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 14:26:30,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434382110] [2020-04-17 14:26:30,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359444414] [2020-04-17 14:26:30,471 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 14:26:30,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:30,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:30,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:30,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:30,598 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 14:26:30,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:30,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:30,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303777243] [2020-04-17 14:26:30,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:30,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:30,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:30,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:30,599 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-04-17 14:26:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:30,741 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-04-17 14:26:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:26:30,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:30,743 INFO L225 Difference]: With dead ends: 153 [2020-04-17 14:26:30,743 INFO L226 Difference]: Without dead ends: 151 [2020-04-17 14:26:30,744 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 14:26:30,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-04-17 14:26:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-04-17 14:26:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 14:26:30,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 14:26:30,749 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 14:26:30,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:30,749 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 14:26:30,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:30,749 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 14:26:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:30,750 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:30,750 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:30,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:30,953 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:30,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-04-17 14:26:30,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:30,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027147947] [2020-04-17 14:26:30,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:31,020 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 14:26:31,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027147947] [2020-04-17 14:26:31,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849884397] [2020-04-17 14:26:31,021 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 14:26:31,064 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:26:31,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:31,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:31,066 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:31,144 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 14:26:31,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:31,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:31,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907948908] [2020-04-17 14:26:31,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:31,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:31,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:31,146 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 14:26:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:31,288 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 14:26:31,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:26:31,289 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:31,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:31,290 INFO L225 Difference]: With dead ends: 156 [2020-04-17 14:26:31,291 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 14:26:31,291 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 14:26:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 14:26:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-04-17 14:26:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 14:26:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-04-17 14:26:31,295 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-04-17 14:26:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:31,296 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-04-17 14:26:31,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:31,296 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-04-17 14:26:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:31,296 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:31,297 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:31,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:31,500 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-04-17 14:26:31,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:31,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527158042] [2020-04-17 14:26:31,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:31,575 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 14:26:31,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527158042] [2020-04-17 14:26:31,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047645994] [2020-04-17 14:26:31,576 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 14:26:31,620 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:31,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:31,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:31,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:31,705 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 14:26:31,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:31,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:31,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839304244] [2020-04-17 14:26:31,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:31,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:31,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:31,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:31,706 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-04-17 14:26:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:31,795 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-04-17 14:26:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:26:31,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:31,797 INFO L225 Difference]: With dead ends: 148 [2020-04-17 14:26:31,797 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 14:26:31,797 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 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 14:26:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 14:26:31,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-04-17 14:26:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 14:26:31,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 14:26:31,802 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 14:26:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:31,802 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 14:26:31,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 14:26:31,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:31,803 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:31,803 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:32,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:32,006 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:32,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-04-17 14:26:32,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:32,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211870866] [2020-04-17 14:26:32,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:32,077 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 14:26:32,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211870866] [2020-04-17 14:26:32,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779153216] [2020-04-17 14:26:32,078 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 14:26:32,118 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:32,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:32,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:32,120 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:32,209 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 14:26:32,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:32,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:32,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420157734] [2020-04-17 14:26:32,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:32,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:32,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:32,210 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 14:26:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:32,379 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-04-17 14:26:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:32,380 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:32,382 INFO L225 Difference]: With dead ends: 157 [2020-04-17 14:26:32,382 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 14:26:32,382 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 14:26:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 14:26:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-04-17 14:26:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 14:26:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-04-17 14:26:32,387 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-04-17 14:26:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:32,387 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-04-17 14:26:32,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-04-17 14:26:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:32,388 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:32,388 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:32,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:32,592 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:32,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:32,592 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-04-17 14:26:32,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:32,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898298212] [2020-04-17 14:26:32,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:32,659 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 14:26:32,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898298212] [2020-04-17 14:26:32,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644697028] [2020-04-17 14:26:32,659 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 14:26:32,722 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:26:32,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:32,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:26:32,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:26:32,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:32,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 14:26:32,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253022234] [2020-04-17 14:26:32,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:26:32,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:32,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:26:32,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:26:32,750 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-04-17 14:26:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:32,836 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-04-17 14:26:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:26:32,836 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 14:26:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:32,838 INFO L225 Difference]: With dead ends: 149 [2020-04-17 14:26:32,838 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 14:26:32,838 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:26:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 14:26:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-04-17 14:26:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 14:26:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 14:26:32,843 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 14:26:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:32,844 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 14:26:32,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:26:32,844 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 14:26:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:32,844 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:32,845 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:33,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:33,048 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-04-17 14:26:33,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:33,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350614299] [2020-04-17 14:26:33,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:33,104 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 14:26:33,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350614299] [2020-04-17 14:26:33,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754948317] [2020-04-17 14:26:33,105 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 14:26:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:33,160 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:33,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:33,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:33,267 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 14:26:33,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:33,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:33,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73368200] [2020-04-17 14:26:33,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:33,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:33,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:33,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:33,269 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 14:26:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:33,491 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-04-17 14:26:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:33,492 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:33,493 INFO L225 Difference]: With dead ends: 164 [2020-04-17 14:26:33,493 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 14:26:33,494 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:26:33,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 14:26:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 14:26:33,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 14:26:33,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-04-17 14:26:33,497 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-04-17 14:26:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:33,498 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-04-17 14:26:33,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-04-17 14:26:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:33,499 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:33,499 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:33,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:33,701 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-04-17 14:26:33,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:33,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212740795] [2020-04-17 14:26:33,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:33,764 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 14:26:33,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212740795] [2020-04-17 14:26:33,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841821906] [2020-04-17 14:26:33,765 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 14:26:33,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:33,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:33,808 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:33,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:33,905 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 14:26:33,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:33,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:33,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349382439] [2020-04-17 14:26:33,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:33,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:33,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:33,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:33,906 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-04-17 14:26:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:34,086 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 14:26:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:26:34,086 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:34,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:34,088 INFO L225 Difference]: With dead ends: 156 [2020-04-17 14:26:34,088 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 14:26:34,089 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 14:26:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 14:26:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-04-17 14:26:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 14:26:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 14:26:34,092 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 14:26:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:34,093 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 14:26:34,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 14:26:34,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:34,094 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:34,094 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:34,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:34,297 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:34,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:34,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-04-17 14:26:34,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:34,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961164741] [2020-04-17 14:26:34,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:34,361 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 14:26:34,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961164741] [2020-04-17 14:26:34,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384523710] [2020-04-17 14:26:34,362 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 14:26:34,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:26:34,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:34,409 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:34,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:34,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:34,533 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 14:26:34,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:34,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:34,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693660280] [2020-04-17 14:26:34,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:34,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:34,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:34,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:34,535 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 14:26:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:34,894 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-04-17 14:26:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:26:34,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:34,896 INFO L225 Difference]: With dead ends: 176 [2020-04-17 14:26:34,896 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 14:26:34,896 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 14:26:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 14:26:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-04-17 14:26:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 14:26:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 14:26:34,901 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 14:26:34,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:34,902 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 14:26:34,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:34,902 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 14:26:34,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:34,902 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:34,903 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:35,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:35,106 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:35,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:35,106 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-04-17 14:26:35,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:35,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292219584] [2020-04-17 14:26:35,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:35,171 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 14:26:35,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292219584] [2020-04-17 14:26:35,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417694780] [2020-04-17 14:26:35,172 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:26:35,236 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:35,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:35,238 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:35,239 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:35,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:35,354 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 14:26:35,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:35,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:35,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570517875] [2020-04-17 14:26:35,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:35,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:35,356 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 14:26:35,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:35,621 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-04-17 14:26:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:35,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:35,623 INFO L225 Difference]: With dead ends: 166 [2020-04-17 14:26:35,623 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 14:26:35,623 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:26:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 14:26:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-04-17 14:26:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 14:26:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-04-17 14:26:35,627 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-04-17 14:26:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:35,627 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-04-17 14:26:35,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:35,627 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-04-17 14:26:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:35,628 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:35,628 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:35,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:35,831 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:35,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-04-17 14:26:35,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:35,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621191223] [2020-04-17 14:26:35,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:26:35,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621191223] [2020-04-17 14:26:35,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547389890] [2020-04-17 14:26:35,898 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 14:26:35,939 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:35,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:35,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:35,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:36,022 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 14:26:36,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:36,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:36,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344503501] [2020-04-17 14:26:36,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:36,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:36,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:36,028 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-04-17 14:26:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:36,206 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-04-17 14:26:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:36,206 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:36,208 INFO L225 Difference]: With dead ends: 163 [2020-04-17 14:26:36,208 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 14:26:36,208 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 14:26:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 14:26:36,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-04-17 14:26:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-04-17 14:26:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-04-17 14:26:36,213 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-04-17 14:26:36,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:36,213 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-04-17 14:26:36,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:36,213 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-04-17 14:26:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:36,214 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:36,214 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:36,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:36,417 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:36,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-04-17 14:26:36,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:36,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489245443] [2020-04-17 14:26:36,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:36,477 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 14:26:36,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489245443] [2020-04-17 14:26:36,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289419785] [2020-04-17 14:26:36,478 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 14:26:36,520 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:26:36,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:36,521 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:36,521 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:36,628 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 14:26:36,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:36,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:36,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252097519] [2020-04-17 14:26:36,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:36,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:36,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:36,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:36,629 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-04-17 14:26:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:36,881 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-04-17 14:26:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:26:36,881 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:36,883 INFO L225 Difference]: With dead ends: 170 [2020-04-17 14:26:36,883 INFO L226 Difference]: Without dead ends: 168 [2020-04-17 14:26:36,883 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 14:26:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-04-17 14:26:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-04-17 14:26:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-04-17 14:26:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-04-17 14:26:36,889 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-04-17 14:26:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:36,890 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-04-17 14:26:36,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-04-17 14:26:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:36,890 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:36,891 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:37,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:37,094 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:37,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:37,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-04-17 14:26:37,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:37,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911906506] [2020-04-17 14:26:37,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:37,151 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 14:26:37,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911906506] [2020-04-17 14:26:37,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000237456] [2020-04-17 14:26:37,152 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 14:26:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:37,192 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:37,193 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:37,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:37,267 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 14:26:37,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:37,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:37,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627454143] [2020-04-17 14:26:37,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:37,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:37,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:37,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:37,269 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-04-17 14:26:37,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:37,546 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-04-17 14:26:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:26:37,546 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:37,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:37,547 INFO L225 Difference]: With dead ends: 177 [2020-04-17 14:26:37,547 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 14:26:37,548 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 14:26:37,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 14:26:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-04-17 14:26:37,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-04-17 14:26:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-04-17 14:26:37,551 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-04-17 14:26:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:37,552 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-04-17 14:26:37,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-04-17 14:26:37,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:37,552 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:37,552 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:37,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:37,755 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:37,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-04-17 14:26:37,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:37,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31559405] [2020-04-17 14:26:37,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:37,814 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 14:26:37,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31559405] [2020-04-17 14:26:37,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652334078] [2020-04-17 14:26:37,815 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 14:26:37,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:37,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:37,876 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:37,877 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:37,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:37,950 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 14:26:37,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:37,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:37,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404807624] [2020-04-17 14:26:37,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:37,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:37,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:37,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:37,952 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-04-17 14:26:38,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:38,317 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-04-17 14:26:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:26:38,318 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:38,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:38,319 INFO L225 Difference]: With dead ends: 190 [2020-04-17 14:26:38,319 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 14:26:38,320 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 14:26:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 14:26:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-04-17 14:26:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 14:26:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-04-17 14:26:38,324 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-04-17 14:26:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:38,324 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-04-17 14:26:38,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-04-17 14:26:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:38,325 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:38,325 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:38,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:38,526 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:38,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:38,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-04-17 14:26:38,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:38,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993022537] [2020-04-17 14:26:38,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:38,598 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 14:26:38,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993022537] [2020-04-17 14:26:38,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162949359] [2020-04-17 14:26:38,598 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 14:26:38,639 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:26:38,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:38,640 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:38,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:38,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:38,717 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 14:26:38,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:38,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:38,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426521486] [2020-04-17 14:26:38,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:38,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:38,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:38,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:38,718 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-04-17 14:26:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:39,049 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-04-17 14:26:39,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:26:39,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:39,051 INFO L225 Difference]: With dead ends: 180 [2020-04-17 14:26:39,051 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 14:26:39,052 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 14:26:39,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 14:26:39,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-04-17 14:26:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 14:26:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-04-17 14:26:39,056 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-04-17 14:26:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:39,056 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-04-17 14:26:39,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-04-17 14:26:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:39,057 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:39,057 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:39,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:39,260 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:39,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-04-17 14:26:39,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:39,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031774684] [2020-04-17 14:26:39,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:39,326 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 14:26:39,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031774684] [2020-04-17 14:26:39,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998695553] [2020-04-17 14:26:39,327 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 14:26:39,369 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:39,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:39,371 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:39,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:39,445 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 14:26:39,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:39,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:39,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136502328] [2020-04-17 14:26:39,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:39,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:39,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:39,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:39,447 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-04-17 14:26:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:39,590 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-04-17 14:26:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:39,591 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:39,592 INFO L225 Difference]: With dead ends: 164 [2020-04-17 14:26:39,592 INFO L226 Difference]: Without dead ends: 162 [2020-04-17 14:26:39,593 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 14:26:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-04-17 14:26:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-04-17 14:26:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 14:26:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-04-17 14:26:39,596 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-04-17 14:26:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:39,596 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-04-17 14:26:39,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-04-17 14:26:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:39,597 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:39,597 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:39,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:39,798 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:39,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-04-17 14:26:39,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:39,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116597444] [2020-04-17 14:26:39,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:39,868 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 14:26:39,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116597444] [2020-04-17 14:26:39,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246638284] [2020-04-17 14:26:39,868 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 14:26:39,913 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:39,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:39,914 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:39,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:40,032 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 14:26:40,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:40,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:40,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426768888] [2020-04-17 14:26:40,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:40,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:40,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:40,034 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-04-17 14:26:40,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:40,225 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-04-17 14:26:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:26:40,226 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:40,227 INFO L225 Difference]: With dead ends: 161 [2020-04-17 14:26:40,227 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 14:26:40,227 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:26:40,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 14:26:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-04-17 14:26:40,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 14:26:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-04-17 14:26:40,230 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-04-17 14:26:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:40,231 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-04-17 14:26:40,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-04-17 14:26:40,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:40,231 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:40,232 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:40,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:40,435 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:40,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:40,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-04-17 14:26:40,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:40,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580669745] [2020-04-17 14:26:40,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:40,510 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 14:26:40,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580669745] [2020-04-17 14:26:40,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41553914] [2020-04-17 14:26:40,511 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 14:26:40,557 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:26:40,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:40,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:40,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:40,646 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 14:26:40,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:40,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:40,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897216687] [2020-04-17 14:26:40,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:40,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:40,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:40,647 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-04-17 14:26:40,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:40,839 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-04-17 14:26:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:26:40,839 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:40,841 INFO L225 Difference]: With dead ends: 165 [2020-04-17 14:26:40,841 INFO L226 Difference]: Without dead ends: 163 [2020-04-17 14:26:40,841 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 14:26:40,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-04-17 14:26:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-04-17 14:26:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 14:26:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-04-17 14:26:40,847 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-04-17 14:26:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:40,847 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-04-17 14:26:40,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-04-17 14:26:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:40,848 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:40,848 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:41,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:41,052 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:41,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-04-17 14:26:41,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:41,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568471583] [2020-04-17 14:26:41,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:41,104 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 14:26:41,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568471583] [2020-04-17 14:26:41,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759983003] [2020-04-17 14:26:41,105 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 14:26:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:41,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:41,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:41,254 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 14:26:41,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:41,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:41,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797536962] [2020-04-17 14:26:41,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:41,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:41,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:41,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:41,256 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-04-17 14:26:41,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:41,452 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-04-17 14:26:41,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:26:41,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:41,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:41,454 INFO L225 Difference]: With dead ends: 167 [2020-04-17 14:26:41,454 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 14:26:41,454 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 14:26:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 14:26:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-04-17 14:26:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 14:26:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 14:26:41,458 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 14:26:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:41,458 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 14:26:41,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 14:26:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:41,459 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:41,459 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:41,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:41,662 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:41,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-04-17 14:26:41,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:41,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976693982] [2020-04-17 14:26:41,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:41,717 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 14:26:41,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976693982] [2020-04-17 14:26:41,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358870807] [2020-04-17 14:26:41,718 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 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 14:26:41,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:41,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:41,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:41,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:41,849 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 14:26:41,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:41,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:41,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898292020] [2020-04-17 14:26:41,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:41,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:41,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:41,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:41,851 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 14:26:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:42,119 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-04-17 14:26:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:26:42,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:42,121 INFO L225 Difference]: With dead ends: 168 [2020-04-17 14:26:42,122 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 14:26:42,122 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 14:26:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 14:26:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-04-17 14:26:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 14:26:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 14:26:42,125 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 14:26:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:42,125 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 14:26:42,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 14:26:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:42,126 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:42,126 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:42,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:42,327 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:42,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:42,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-04-17 14:26:42,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:42,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570133749] [2020-04-17 14:26:42,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:42,386 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 14:26:42,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570133749] [2020-04-17 14:26:42,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484098368] [2020-04-17 14:26:42,387 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 14:26:42,438 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:26:42,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:42,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:42,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:42,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:42,511 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 14:26:42,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:42,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:42,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011857159] [2020-04-17 14:26:42,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:42,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:42,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:42,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:42,513 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 14:26:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:42,698 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-04-17 14:26:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:42,699 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:42,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:42,700 INFO L225 Difference]: With dead ends: 160 [2020-04-17 14:26:42,700 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 14:26:42,700 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 14:26:42,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 14:26:42,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-04-17 14:26:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 14:26:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 14:26:42,704 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 14:26:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:42,704 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 14:26:42,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 14:26:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:42,705 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:42,705 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:42,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:42,908 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:42,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-04-17 14:26:42,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:42,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941479905] [2020-04-17 14:26:42,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:42,964 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 14:26:42,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941479905] [2020-04-17 14:26:42,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2235782] [2020-04-17 14:26:42,965 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 14:26:43,018 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:43,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:43,019 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:43,020 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:43,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:43,096 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 14:26:43,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:43,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:43,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98095385] [2020-04-17 14:26:43,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:43,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:43,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:43,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:43,097 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 14:26:43,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:43,418 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-04-17 14:26:43,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:26:43,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:43,421 INFO L225 Difference]: With dead ends: 189 [2020-04-17 14:26:43,421 INFO L226 Difference]: Without dead ends: 181 [2020-04-17 14:26:43,421 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 14:26:43,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-04-17 14:26:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-04-17 14:26:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 14:26:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 14:26:43,425 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 14:26:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:43,426 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 14:26:43,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 14:26:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:43,426 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:43,427 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:43,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:43,627 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:43,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-04-17 14:26:43,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:43,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900117445] [2020-04-17 14:26:43,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:43,682 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 14:26:43,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900117445] [2020-04-17 14:26:43,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101531066] [2020-04-17 14:26:43,683 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 14:26:43,728 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:43,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:43,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:43,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:43,803 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 14:26:43,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:43,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:43,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702978048] [2020-04-17 14:26:43,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:43,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:43,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:43,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:43,805 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 14:26:44,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:44,034 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-04-17 14:26:44,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:26:44,034 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:44,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:44,036 INFO L225 Difference]: With dead ends: 169 [2020-04-17 14:26:44,036 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 14:26:44,036 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 14:26:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 14:26:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-04-17 14:26:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 14:26:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 14:26:44,040 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 14:26:44,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:44,040 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 14:26:44,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:44,040 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 14:26:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:44,041 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:44,041 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:44,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:44,244 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:44,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-04-17 14:26:44,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:44,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728487478] [2020-04-17 14:26:44,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:44,304 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 14:26:44,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728487478] [2020-04-17 14:26:44,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909466182] [2020-04-17 14:26:44,305 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 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 14:26:44,355 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:26:44,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:44,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:44,357 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:44,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:44,428 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 14:26:44,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:44,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:44,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752174553] [2020-04-17 14:26:44,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:44,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:44,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:44,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:44,429 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 14:26:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:44,744 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-04-17 14:26:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:26:44,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:44,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:44,746 INFO L225 Difference]: With dead ends: 192 [2020-04-17 14:26:44,746 INFO L226 Difference]: Without dead ends: 184 [2020-04-17 14:26:44,746 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 14:26:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-04-17 14:26:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-04-17 14:26:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 14:26:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-04-17 14:26:44,749 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-04-17 14:26:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:44,750 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-04-17 14:26:44,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-04-17 14:26:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:44,750 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:44,750 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:44,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:44,951 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:44,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:44,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-04-17 14:26:44,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:44,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428403141] [2020-04-17 14:26:44,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:45,020 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 14:26:45,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428403141] [2020-04-17 14:26:45,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266756757] [2020-04-17 14:26:45,021 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 14:26:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:45,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:26:45,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:45,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:45,143 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 14:26:45,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:45,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 14:26:45,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539964198] [2020-04-17 14:26:45,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:26:45,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:26:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:26:45,144 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-04-17 14:26:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:45,462 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-04-17 14:26:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:26:45,463 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 14:26:45,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:45,464 INFO L225 Difference]: With dead ends: 180 [2020-04-17 14:26:45,464 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 14:26:45,465 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 14:26:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 14:26:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-04-17 14:26:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 14:26:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-04-17 14:26:45,468 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-04-17 14:26:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:45,468 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-04-17 14:26:45,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:26:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-04-17 14:26:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:45,469 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:45,469 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:45,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:45,672 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-04-17 14:26:45,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:45,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810861906] [2020-04-17 14:26:45,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:45,764 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 14:26:45,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810861906] [2020-04-17 14:26:45,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269091093] [2020-04-17 14:26:45,765 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 14:26:45,820 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:26:45,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:45,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:45,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:45,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:45,959 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 14:26:45,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:45,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 14:26:45,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683705229] [2020-04-17 14:26:45,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:26:45,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:45,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:26:45,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:26:45,960 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-04-17 14:26:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:46,122 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-04-17 14:26:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:26:46,122 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-04-17 14:26:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:46,124 INFO L225 Difference]: With dead ends: 164 [2020-04-17 14:26:46,124 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 14:26:46,124 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:26:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 14:26:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 14:26:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 14:26:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-04-17 14:26:46,128 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-04-17 14:26:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:46,128 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-04-17 14:26:46,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:26:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-04-17 14:26:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:46,129 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:46,129 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:46,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:46,332 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:46,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:46,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-04-17 14:26:46,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:46,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115071466] [2020-04-17 14:26:46,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:46,445 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 14:26:46,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115071466] [2020-04-17 14:26:46,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844004836] [2020-04-17 14:26:46,446 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 14:26:46,485 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:26:46,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:46,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:46,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:46,585 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 14:26:46,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:46,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:46,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683059983] [2020-04-17 14:26:46,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:46,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:46,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:46,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:46,586 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-04-17 14:26:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:46,640 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 14:26:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:26:46,641 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 14:26:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:46,642 INFO L225 Difference]: With dead ends: 156 [2020-04-17 14:26:46,642 INFO L226 Difference]: Without dead ends: 153 [2020-04-17 14:26:46,643 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 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 14:26:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-04-17 14:26:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-04-17 14:26:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 14:26:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 14:26:46,646 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 14:26:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:46,647 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 14:26:46,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 14:26:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:46,647 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:46,647 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:46,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:46,851 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:46,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-04-17 14:26:46,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:46,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685172815] [2020-04-17 14:26:46,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:46,951 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 14:26:46,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685172815] [2020-04-17 14:26:46,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100338179] [2020-04-17 14:26:46,952 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 14:26:46,994 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:46,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:46,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:46,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:47,089 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 14:26:47,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:47,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:47,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305206058] [2020-04-17 14:26:47,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:47,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:47,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:47,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:47,091 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 14:26:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:47,164 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-04-17 14:26:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:26:47,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 14:26:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:47,165 INFO L225 Difference]: With dead ends: 170 [2020-04-17 14:26:47,165 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 14:26:47,166 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 14:26:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 14:26:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-04-17 14:26:47,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 14:26:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 14:26:47,169 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 14:26:47,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:47,169 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 14:26:47,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 14:26:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:47,170 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:47,170 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:47,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:47,373 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:47,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:47,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-04-17 14:26:47,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:47,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045521831] [2020-04-17 14:26:47,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:47,468 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 14:26:47,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045521831] [2020-04-17 14:26:47,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846931289] [2020-04-17 14:26:47,468 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 14:26:47,509 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:26:47,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:47,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:47,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:47,607 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 14:26:47,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:47,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:47,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176061569] [2020-04-17 14:26:47,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:47,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:47,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:47,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:47,609 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 14:26:47,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:47,697 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-04-17 14:26:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:26:47,698 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 14:26:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:47,699 INFO L225 Difference]: With dead ends: 169 [2020-04-17 14:26:47,699 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 14:26:47,700 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 14:26:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 14:26:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-04-17 14:26:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 14:26:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-04-17 14:26:47,703 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-04-17 14:26:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:47,703 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-04-17 14:26:47,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-04-17 14:26:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:47,704 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:47,704 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:47,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:47,908 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:47,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:47,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-04-17 14:26:47,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:47,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530114026] [2020-04-17 14:26:47,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:47,988 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 14:26:47,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530114026] [2020-04-17 14:26:47,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536765746] [2020-04-17 14:26:47,988 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 14:26:48,028 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:26:48,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:48,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:48,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:48,131 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 14:26:48,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:48,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:48,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223610369] [2020-04-17 14:26:48,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:48,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:48,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:48,133 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-04-17 14:26:48,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:48,243 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-04-17 14:26:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:26:48,244 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 14:26:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:48,244 INFO L225 Difference]: With dead ends: 168 [2020-04-17 14:26:48,245 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 14:26:48,245 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 14:26:48,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 14:26:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-04-17 14:26:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 14:26:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-04-17 14:26:48,247 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-04-17 14:26:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:48,247 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-04-17 14:26:48,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-04-17 14:26:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:48,248 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:48,248 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:48,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:48,451 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:48,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-04-17 14:26:48,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:48,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637213996] [2020-04-17 14:26:48,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:48,517 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 14:26:48,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637213996] [2020-04-17 14:26:48,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329689717] [2020-04-17 14:26:48,518 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 14:26:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:48,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:48,562 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:48,666 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 14:26:48,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:48,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:48,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578553868] [2020-04-17 14:26:48,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:48,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:48,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:48,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:48,668 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-04-17 14:26:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:48,804 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-04-17 14:26:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:48,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 14:26:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:48,806 INFO L225 Difference]: With dead ends: 167 [2020-04-17 14:26:48,806 INFO L226 Difference]: Without dead ends: 164 [2020-04-17 14:26:48,806 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 14:26:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-04-17 14:26:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-04-17 14:26:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 14:26:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-04-17 14:26:48,809 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-04-17 14:26:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:48,810 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-04-17 14:26:48,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-04-17 14:26:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:26:48,810 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:48,810 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:49,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:49,012 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:49,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-04-17 14:26:49,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:49,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191243093] [2020-04-17 14:26:49,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:49,099 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 14:26:49,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191243093] [2020-04-17 14:26:49,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567409697] [2020-04-17 14:26:49,100 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 14:26:49,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:49,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:49,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:49,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:49,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:26:49,244 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 14:26:49,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:49,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:49,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897254979] [2020-04-17 14:26:49,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:49,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:49,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:49,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:49,245 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-04-17 14:26:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:49,461 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-04-17 14:26:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:26:49,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 14:26:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:49,464 INFO L225 Difference]: With dead ends: 176 [2020-04-17 14:26:49,464 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 14:26:49,464 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 14:26:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 14:26:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-04-17 14:26:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 14:26:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-04-17 14:26:49,468 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-04-17 14:26:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:49,468 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-04-17 14:26:49,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-04-17 14:26:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:49,468 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:49,468 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:49,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:49,669 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:49,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:49,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-04-17 14:26:49,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:49,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560150373] [2020-04-17 14:26:49,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:49,758 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 14:26:49,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560150373] [2020-04-17 14:26:49,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358690702] [2020-04-17 14:26:49,758 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 14:26:49,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:49,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:49,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:49,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:49,922 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 14:26:49,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:49,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:49,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846075786] [2020-04-17 14:26:49,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:49,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:49,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:49,924 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-04-17 14:26:49,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:49,978 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-04-17 14:26:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:26:49,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:26:49,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:49,980 INFO L225 Difference]: With dead ends: 163 [2020-04-17 14:26:49,980 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 14:26:49,981 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 14:26:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 14:26:49,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-04-17 14:26:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 14:26:49,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-04-17 14:26:49,985 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-04-17 14:26:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:49,985 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-04-17 14:26:49,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-04-17 14:26:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:49,986 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:49,986 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:50,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:50,189 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:50,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-04-17 14:26:50,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:50,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963718639] [2020-04-17 14:26:50,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:50,265 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 14:26:50,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963718639] [2020-04-17 14:26:50,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901950100] [2020-04-17 14:26:50,266 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 14:26:50,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:26:50,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:50,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:50,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:50,408 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 14:26:50,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:50,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:50,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344286764] [2020-04-17 14:26:50,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:50,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:50,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:50,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:50,409 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-04-17 14:26:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:50,548 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-04-17 14:26:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:26:50,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:26:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:50,550 INFO L225 Difference]: With dead ends: 172 [2020-04-17 14:26:50,551 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 14:26:50,551 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 14:26:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 14:26:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-04-17 14:26:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 14:26:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 14:26:50,554 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 14:26:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:50,554 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 14:26:50,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 14:26:50,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:50,555 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:50,555 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:50,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:50,756 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:50,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:50,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-04-17 14:26:50,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:50,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799756014] [2020-04-17 14:26:50,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:50,829 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 14:26:50,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799756014] [2020-04-17 14:26:50,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249394797] [2020-04-17 14:26:50,830 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:26:50,868 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:50,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:50,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:50,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:51,020 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 14:26:51,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:51,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:51,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243517120] [2020-04-17 14:26:51,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:51,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:51,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:51,021 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 14:26:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:51,199 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 14:26:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:26:51,199 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:26:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:51,201 INFO L225 Difference]: With dead ends: 179 [2020-04-17 14:26:51,201 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 14:26:51,201 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:26:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 14:26:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-04-17 14:26:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 14:26:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-04-17 14:26:51,206 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-04-17 14:26:51,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:51,206 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-04-17 14:26:51,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-04-17 14:26:51,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:51,207 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:51,207 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:51,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:51,410 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:51,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:51,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-04-17 14:26:51,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:51,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966349830] [2020-04-17 14:26:51,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:51,481 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 14:26:51,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966349830] [2020-04-17 14:26:51,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672523578] [2020-04-17 14:26:51,482 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 14:26:51,524 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:51,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:51,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:51,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:51,629 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 14:26:51,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:51,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:51,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526133743] [2020-04-17 14:26:51,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:51,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:51,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:51,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:51,631 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-04-17 14:26:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:51,803 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 14:26:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:26:51,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:26:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:51,805 INFO L225 Difference]: With dead ends: 179 [2020-04-17 14:26:51,805 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 14:26:51,805 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 14:26:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 14:26:51,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-04-17 14:26:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 14:26:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 14:26:51,809 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 14:26:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:51,809 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 14:26:51,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 14:26:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:51,809 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:51,810 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:52,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:52,011 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:52,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-04-17 14:26:52,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:52,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106954497] [2020-04-17 14:26:52,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:52,089 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 14:26:52,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106954497] [2020-04-17 14:26:52,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297197278] [2020-04-17 14:26:52,090 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 14:26:52,132 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:26:52,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:52,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:52,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:52,221 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 14:26:52,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:52,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:52,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199698241] [2020-04-17 14:26:52,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:52,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:52,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:52,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:52,222 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 14:26:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:52,413 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-04-17 14:26:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:52,413 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:26:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:52,415 INFO L225 Difference]: With dead ends: 184 [2020-04-17 14:26:52,415 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 14:26:52,415 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:26:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 14:26:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-04-17 14:26:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 14:26:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-04-17 14:26:52,419 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-04-17 14:26:52,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:52,419 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-04-17 14:26:52,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:52,419 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-04-17 14:26:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:52,420 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:52,420 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:52,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:52,622 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:52,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-04-17 14:26:52,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:52,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598204017] [2020-04-17 14:26:52,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:26:52,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598204017] [2020-04-17 14:26:52,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404263784] [2020-04-17 14:26:52,696 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 14:26:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:52,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:52,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:53,285 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 14:26:53,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:53,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:53,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140635156] [2020-04-17 14:26:53,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:53,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:53,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:53,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:53,287 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-04-17 14:26:53,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:53,478 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-04-17 14:26:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:53,479 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:26:53,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:53,480 INFO L225 Difference]: With dead ends: 179 [2020-04-17 14:26:53,480 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 14:26:53,481 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:26:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 14:26:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-04-17 14:26:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-04-17 14:26:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-04-17 14:26:53,484 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-04-17 14:26:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:53,485 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-04-17 14:26:53,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-04-17 14:26:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:53,485 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:53,485 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:53,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:53,689 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:53,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-04-17 14:26:53,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:53,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533162109] [2020-04-17 14:26:53,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:53,770 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 14:26:53,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533162109] [2020-04-17 14:26:53,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56657663] [2020-04-17 14:26:53,770 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 14:26:53,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:26:53,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:53,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:53,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:53,912 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 14:26:53,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:53,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:53,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623160719] [2020-04-17 14:26:53,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:53,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:53,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:53,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:53,913 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-04-17 14:26:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:54,081 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-04-17 14:26:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:26:54,081 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:26:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:54,082 INFO L225 Difference]: With dead ends: 176 [2020-04-17 14:26:54,083 INFO L226 Difference]: Without dead ends: 174 [2020-04-17 14:26:54,083 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 14:26:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-04-17 14:26:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-04-17 14:26:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 14:26:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-04-17 14:26:54,086 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-04-17 14:26:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:54,086 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-04-17 14:26:54,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-04-17 14:26:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:54,087 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:54,087 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:54,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:54,290 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:54,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:54,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-04-17 14:26:54,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:54,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818515579] [2020-04-17 14:26:54,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:54,372 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 14:26:54,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818515579] [2020-04-17 14:26:54,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587525550] [2020-04-17 14:26:54,373 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 14:26:54,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:26:54,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:54,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:54,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:54,554 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 14:26:54,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:54,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:54,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102721470] [2020-04-17 14:26:54,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:54,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:54,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:54,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:54,556 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-04-17 14:26:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:54,746 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 14:26:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:54,746 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:26:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:54,748 INFO L225 Difference]: With dead ends: 185 [2020-04-17 14:26:54,748 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 14:26:54,748 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 14:26:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 14:26:54,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-04-17 14:26:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 14:26:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-04-17 14:26:54,752 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-04-17 14:26:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:54,752 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-04-17 14:26:54,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-04-17 14:26:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:54,752 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:54,752 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:54,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:54,953 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:54,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-04-17 14:26:54,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:54,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279220415] [2020-04-17 14:26:54,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:55,031 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 14:26:55,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279220415] [2020-04-17 14:26:55,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958312441] [2020-04-17 14:26:55,031 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 14:26:55,073 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:26:55,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:55,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:55,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:26:55,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:55,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:55,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588791903] [2020-04-17 14:26:55,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:55,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:55,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:55,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:55,180 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-04-17 14:26:55,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:55,381 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 14:26:55,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:26:55,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:26:55,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:55,383 INFO L225 Difference]: With dead ends: 185 [2020-04-17 14:26:55,383 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 14:26:55,383 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 14:26:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 14:26:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-04-17 14:26:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 14:26:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-04-17 14:26:55,387 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-04-17 14:26:55,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:55,388 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-04-17 14:26:55,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-04-17 14:26:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:55,389 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:55,389 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:55,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:55,594 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:55,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:55,594 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-04-17 14:26:55,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:55,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573867740] [2020-04-17 14:26:55,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:55,705 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 14:26:55,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573867740] [2020-04-17 14:26:55,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472519080] [2020-04-17 14:26:55,706 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 14:26:55,750 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:26:55,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:55,751 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:55,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:55,848 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 14:26:55,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:55,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:55,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788405966] [2020-04-17 14:26:55,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:55,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:55,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:55,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:55,850 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-04-17 14:26:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:55,918 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-04-17 14:26:55,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:26:55,919 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:26:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:55,920 INFO L225 Difference]: With dead ends: 182 [2020-04-17 14:26:55,920 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 14:26:55,921 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 14:26:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 14:26:55,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-04-17 14:26:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 14:26:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-04-17 14:26:55,925 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-04-17 14:26:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:55,925 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-04-17 14:26:55,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-04-17 14:26:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:55,926 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:55,926 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:56,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:56,129 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:56,130 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-04-17 14:26:56,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:56,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643471837] [2020-04-17 14:26:56,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:56,239 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 14:26:56,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643471837] [2020-04-17 14:26:56,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186147061] [2020-04-17 14:26:56,240 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 14:26:56,283 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:26:56,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:26:56,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:56,284 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:26:56,390 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 14:26:56,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:26:56,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:26:56,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637964090] [2020-04-17 14:26:56,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:26:56,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:26:56,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:26:56,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:26:56,391 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-04-17 14:26:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:26:56,554 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-04-17 14:26:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:26:56,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:26:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:26:56,557 INFO L225 Difference]: With dead ends: 185 [2020-04-17 14:26:56,557 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 14:26:56,557 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 14:26:56,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 14:26:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-04-17 14:26:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 14:26:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 14:26:56,561 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 14:26:56,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:26:56,561 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 14:26:56,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:26:56,562 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 14:26:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:26:56,562 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:26:56,562 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:26:56,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:26:56,763 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:26:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:26:56,764 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-04-17 14:26:56,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:26:56,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755138320] [2020-04-17 14:26:56,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:26:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:56,848 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 14:26:56,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755138320] [2020-04-17 14:26:56,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636264245] [2020-04-17 14:26:56,849 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 14:26:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:26:56,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:26:56,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:01,246 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 14:27:01,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:01,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:01,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616883577] [2020-04-17 14:27:01,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:01,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:01,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:01,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:01,247 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 14:27:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:01,471 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-04-17 14:27:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:27:01,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:01,473 INFO L225 Difference]: With dead ends: 191 [2020-04-17 14:27:01,473 INFO L226 Difference]: Without dead ends: 189 [2020-04-17 14:27:01,473 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:27:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-04-17 14:27:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-04-17 14:27:01,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 14:27:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-04-17 14:27:01,477 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-04-17 14:27:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:01,477 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-04-17 14:27:01,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-04-17 14:27:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:01,478 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:01,478 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:01,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:01,679 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:01,679 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-04-17 14:27:01,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:01,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711955359] [2020-04-17 14:27:01,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:01,757 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 14:27:01,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711955359] [2020-04-17 14:27:01,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968487908] [2020-04-17 14:27:01,758 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 14:27:01,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:27:01,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:01,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:01,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:01,911 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 14:27:01,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:01,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:01,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948612355] [2020-04-17 14:27:01,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:01,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:01,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:01,913 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-04-17 14:27:02,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:02,134 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-04-17 14:27:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:27:02,135 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:02,137 INFO L225 Difference]: With dead ends: 187 [2020-04-17 14:27:02,137 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 14:27:02,138 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 14:27:02,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 14:27:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-04-17 14:27:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 14:27:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 14:27:02,142 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 14:27:02,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:02,142 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 14:27:02,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 14:27:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:02,143 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:02,143 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:02,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:02,346 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:02,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:02,346 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-04-17 14:27:02,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:02,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647332645] [2020-04-17 14:27:02,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:02,423 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 14:27:02,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647332645] [2020-04-17 14:27:02,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344358006] [2020-04-17 14:27:02,424 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 14:27:02,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:27:02,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:02,469 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:02,470 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:02,572 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 14:27:02,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:02,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:02,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148760170] [2020-04-17 14:27:02,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:02,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:02,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:02,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:02,574 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 14:27:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:02,812 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-04-17 14:27:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:27:02,813 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:02,814 INFO L225 Difference]: With dead ends: 198 [2020-04-17 14:27:02,814 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 14:27:02,815 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 14:27:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 14:27:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-04-17 14:27:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 14:27:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-04-17 14:27:02,819 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-04-17 14:27:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:02,819 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-04-17 14:27:02,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-04-17 14:27:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:02,820 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:02,820 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:03,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:03,023 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:03,023 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-04-17 14:27:03,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:03,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431063139] [2020-04-17 14:27:03,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:03,101 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 14:27:03,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431063139] [2020-04-17 14:27:03,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864786696] [2020-04-17 14:27:03,102 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 14:27:03,142 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:27:03,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:03,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:03,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:03,609 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 14:27:03,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:03,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:03,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195409584] [2020-04-17 14:27:03,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:03,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:03,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:03,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:03,610 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-04-17 14:27:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:03,860 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-04-17 14:27:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:27:03,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:03,862 INFO L225 Difference]: With dead ends: 189 [2020-04-17 14:27:03,862 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 14:27:03,862 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 14:27:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 14:27:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-04-17 14:27:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 14:27:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-04-17 14:27:03,866 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-04-17 14:27:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:03,866 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-04-17 14:27:03,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-04-17 14:27:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:03,866 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:03,867 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:04,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:04,067 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:04,068 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-04-17 14:27:04,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:04,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289279235] [2020-04-17 14:27:04,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:04,173 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 14:27:04,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289279235] [2020-04-17 14:27:04,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355229482] [2020-04-17 14:27:04,173 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 14:27:04,216 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:27:04,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:04,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:04,218 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:04,334 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 14:27:04,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:04,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:04,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104346109] [2020-04-17 14:27:04,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:04,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:04,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:04,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:04,336 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-04-17 14:27:04,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:04,433 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-04-17 14:27:04,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:27:04,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:04,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:04,436 INFO L225 Difference]: With dead ends: 178 [2020-04-17 14:27:04,436 INFO L226 Difference]: Without dead ends: 176 [2020-04-17 14:27:04,436 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 14:27:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-04-17 14:27:04,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-04-17 14:27:04,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 14:27:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-04-17 14:27:04,439 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-04-17 14:27:04,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:04,439 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-04-17 14:27:04,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-04-17 14:27:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:04,440 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:04,440 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:04,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:04,641 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:04,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:04,641 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-04-17 14:27:04,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:04,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243265352] [2020-04-17 14:27:04,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:04,742 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 14:27:04,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243265352] [2020-04-17 14:27:04,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921239243] [2020-04-17 14:27:04,743 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 14:27:04,785 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:27:04,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:04,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:04,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:04,885 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 14:27:04,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:04,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:04,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558393714] [2020-04-17 14:27:04,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:04,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:04,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:04,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:04,886 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-04-17 14:27:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:05,070 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-04-17 14:27:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:27:05,071 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:05,073 INFO L225 Difference]: With dead ends: 193 [2020-04-17 14:27:05,073 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 14:27:05,073 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 14:27:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 14:27:05,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-04-17 14:27:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 14:27:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-04-17 14:27:05,077 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-04-17 14:27:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:05,077 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-04-17 14:27:05,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-04-17 14:27:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:05,078 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:05,078 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:05,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:05,278 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-04-17 14:27:05,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:05,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982537319] [2020-04-17 14:27:05,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:05,376 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 14:27:05,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982537319] [2020-04-17 14:27:05,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309645036] [2020-04-17 14:27:05,377 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 14:27:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:05,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:05,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:05,553 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 14:27:05,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:05,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:05,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919934453] [2020-04-17 14:27:05,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:05,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:05,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:05,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:05,555 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-04-17 14:27:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:05,814 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 14:27:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:27:05,815 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:05,816 INFO L225 Difference]: With dead ends: 195 [2020-04-17 14:27:05,816 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 14:27:05,817 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 14:27:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 14:27:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-04-17 14:27:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 14:27:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-04-17 14:27:05,820 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-04-17 14:27:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:05,820 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-04-17 14:27:05,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-04-17 14:27:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:05,821 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:05,821 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:06,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:06,022 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-04-17 14:27:06,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:06,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635042125] [2020-04-17 14:27:06,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:06,112 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 14:27:06,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635042125] [2020-04-17 14:27:06,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975314838] [2020-04-17 14:27:06,112 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 14:27:06,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:27:06,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:06,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:06,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:06,322 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 14:27:06,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:06,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:06,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405309730] [2020-04-17 14:27:06,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:06,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:06,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:06,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:06,323 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-04-17 14:27:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:06,435 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-04-17 14:27:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:27:06,435 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:06,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:06,437 INFO L225 Difference]: With dead ends: 174 [2020-04-17 14:27:06,437 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 14:27:06,437 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 14:27:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 14:27:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-04-17 14:27:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 14:27:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-04-17 14:27:06,441 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-04-17 14:27:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:06,441 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-04-17 14:27:06,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-04-17 14:27:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:06,442 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:06,442 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:06,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:06,644 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:06,644 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-04-17 14:27:06,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:06,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019578544] [2020-04-17 14:27:06,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:06,717 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 14:27:06,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019578544] [2020-04-17 14:27:06,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734147858] [2020-04-17 14:27:06,718 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 14:27:06,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:27:06,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:06,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:06,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:06,863 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 14:27:06,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:06,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:06,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526255552] [2020-04-17 14:27:06,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:06,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:06,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:06,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:06,864 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-04-17 14:27:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:07,090 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-04-17 14:27:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:27:07,091 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:07,092 INFO L225 Difference]: With dead ends: 189 [2020-04-17 14:27:07,093 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 14:27:07,093 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 14:27:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 14:27:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-04-17 14:27:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 14:27:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-04-17 14:27:07,096 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-04-17 14:27:07,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:07,096 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-04-17 14:27:07,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-04-17 14:27:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:07,097 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:07,097 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:07,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:07,298 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:07,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:07,298 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-04-17 14:27:07,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:07,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869144877] [2020-04-17 14:27:07,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:07,385 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 14:27:07,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869144877] [2020-04-17 14:27:07,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873389265] [2020-04-17 14:27:07,386 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 14:27:07,429 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:27:07,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:07,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:07,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:07,529 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 14:27:07,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:07,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:07,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399709810] [2020-04-17 14:27:07,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:07,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:07,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:07,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:07,530 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-04-17 14:27:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:07,666 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-04-17 14:27:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:27:07,666 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:07,668 INFO L225 Difference]: With dead ends: 175 [2020-04-17 14:27:07,668 INFO L226 Difference]: Without dead ends: 173 [2020-04-17 14:27:07,668 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 14:27:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-04-17 14:27:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-04-17 14:27:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 14:27:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 14:27:07,672 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 14:27:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:07,672 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 14:27:07,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 14:27:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:07,673 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:07,673 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:07,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:07,875 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-04-17 14:27:07,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:07,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107270523] [2020-04-17 14:27:07,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:07,939 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 14:27:07,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107270523] [2020-04-17 14:27:07,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206041612] [2020-04-17 14:27:07,940 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 14:27:07,982 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:27:07,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:07,983 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:07,984 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:08,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:08,074 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 14:27:08,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:08,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:08,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480852333] [2020-04-17 14:27:08,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:08,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:08,076 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 14:27:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:08,422 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-04-17 14:27:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:27:08,423 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:08,424 INFO L225 Difference]: With dead ends: 195 [2020-04-17 14:27:08,424 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 14:27:08,425 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 14:27:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 14:27:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-04-17 14:27:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 14:27:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 14:27:08,428 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 14:27:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:08,428 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 14:27:08,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:08,429 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 14:27:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:08,429 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:08,429 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:08,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:08,630 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:08,630 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-04-17 14:27:08,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:08,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677689564] [2020-04-17 14:27:08,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:08,691 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 14:27:08,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677689564] [2020-04-17 14:27:08,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615538135] [2020-04-17 14:27:08,691 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 14:27:08,733 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:27:08,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:08,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:08,734 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:08,838 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 14:27:08,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:08,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:08,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826575728] [2020-04-17 14:27:08,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:08,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:08,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:08,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:08,839 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 14:27:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:09,076 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-04-17 14:27:09,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:27:09,077 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:09,078 INFO L225 Difference]: With dead ends: 187 [2020-04-17 14:27:09,079 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 14:27:09,079 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 14:27:09,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 14:27:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-04-17 14:27:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 14:27:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 14:27:09,082 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 14:27:09,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:09,083 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 14:27:09,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 14:27:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:09,083 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:09,083 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:09,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:09,284 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-04-17 14:27:09,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:09,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702958391] [2020-04-17 14:27:09,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:09,350 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 14:27:09,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702958391] [2020-04-17 14:27:09,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649655668] [2020-04-17 14:27:09,351 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 14:27:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:09,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:09,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:10,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:10,322 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 14:27:10,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:10,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:10,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433450262] [2020-04-17 14:27:10,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:10,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=138, Unknown=2, NotChecked=0, Total=210 [2020-04-17 14:27:10,323 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 14:27:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:10,732 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-04-17 14:27:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:27:10,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:10,735 INFO L225 Difference]: With dead ends: 212 [2020-04-17 14:27:10,735 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 14:27:10,735 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=504, Unknown=2, NotChecked=0, Total=756 [2020-04-17 14:27:10,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 14:27:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 14:27:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 14:27:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 14:27:10,740 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 14:27:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:10,740 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 14:27:10,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 14:27:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:10,740 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:10,741 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:10,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:10,944 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:10,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:10,944 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-04-17 14:27:10,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:10,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169573984] [2020-04-17 14:27:10,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:11,038 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 14:27:11,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169573984] [2020-04-17 14:27:11,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269446753] [2020-04-17 14:27:11,038 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 14:27:11,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:27:11,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:11,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:11,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:11,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:11,575 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 14:27:11,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:11,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 14:27:11,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433705977] [2020-04-17 14:27:11,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:27:11,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:11,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:27:11,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 14:27:11,576 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 16 states. [2020-04-17 14:27:11,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:11,899 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 14:27:11,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:27:11,901 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 14:27:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:11,902 INFO L225 Difference]: With dead ends: 202 [2020-04-17 14:27:11,902 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 14:27:11,903 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=441, Unknown=1, NotChecked=0, Total=650 [2020-04-17 14:27:11,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 14:27:11,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-04-17 14:27:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 14:27:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-04-17 14:27:11,906 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-04-17 14:27:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:11,907 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-04-17 14:27:11,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:27:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-04-17 14:27:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:11,907 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:11,907 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:12,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:12,108 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:12,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:12,108 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-04-17 14:27:12,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:12,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412799501] [2020-04-17 14:27:12,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:12,169 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 14:27:12,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412799501] [2020-04-17 14:27:12,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044551564] [2020-04-17 14:27:12,170 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 14:27:12,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:27:12,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:12,212 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:12,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:12,350 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 14:27:12,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:12,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:12,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517873898] [2020-04-17 14:27:12,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:12,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:12,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:12,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:12,352 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-04-17 14:27:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:12,693 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-04-17 14:27:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:27:12,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:12,695 INFO L225 Difference]: With dead ends: 198 [2020-04-17 14:27:12,696 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 14:27:12,696 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:27:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 14:27:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-04-17 14:27:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 14:27:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 14:27:12,706 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 14:27:12,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:12,706 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 14:27:12,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 14:27:12,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:12,707 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:12,707 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:12,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:12,911 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:12,911 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-04-17 14:27:12,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:12,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590369289] [2020-04-17 14:27:12,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:12,976 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 14:27:12,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590369289] [2020-04-17 14:27:12,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922060141] [2020-04-17 14:27:12,976 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 14:27:13,019 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:27:13,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:13,020 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:13,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:17,124 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 14:27:17,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:17,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:17,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184016022] [2020-04-17 14:27:17,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:17,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:17,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:17,126 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 14:27:17,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:17,512 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-04-17 14:27:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:27:17,512 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:17,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:17,514 INFO L225 Difference]: With dead ends: 209 [2020-04-17 14:27:17,514 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 14:27:17,515 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:27:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 14:27:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 14:27:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 14:27:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 14:27:17,518 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 14:27:17,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:17,518 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 14:27:17,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 14:27:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:17,518 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:17,519 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:17,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:17,719 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:17,720 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-04-17 14:27:17,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:17,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917503363] [2020-04-17 14:27:17,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:17,791 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 14:27:17,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917503363] [2020-04-17 14:27:17,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805552813] [2020-04-17 14:27:17,792 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 14:27:17,834 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:27:17,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:17,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:17,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:17,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:17,976 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 14:27:17,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:17,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:17,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154551107] [2020-04-17 14:27:17,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:17,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:17,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:17,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:17,977 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 14:27:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:18,585 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-04-17 14:27:18,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:27:18,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:18,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:18,586 INFO L225 Difference]: With dead ends: 217 [2020-04-17 14:27:18,586 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 14:27:18,587 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:27:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 14:27:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-04-17 14:27:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 14:27:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-04-17 14:27:18,591 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-04-17 14:27:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:18,592 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-04-17 14:27:18,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-04-17 14:27:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:18,592 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:18,592 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:18,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:18,796 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-04-17 14:27:18,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:18,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148492604] [2020-04-17 14:27:18,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:18,864 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 14:27:18,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148492604] [2020-04-17 14:27:18,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161006286] [2020-04-17 14:27:18,865 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 14:27:18,906 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:27:18,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:18,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:18,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:19,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:19,031 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 14:27:19,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:19,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:19,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648745951] [2020-04-17 14:27:19,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:19,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:19,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:19,032 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-04-17 14:27:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:19,621 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-04-17 14:27:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:27:19,622 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:19,623 INFO L225 Difference]: With dead ends: 236 [2020-04-17 14:27:19,624 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 14:27:19,624 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:27:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 14:27:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-04-17 14:27:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 14:27:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-04-17 14:27:19,628 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-04-17 14:27:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:19,629 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-04-17 14:27:19,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-04-17 14:27:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:19,629 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:19,630 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:19,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:19,833 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-04-17 14:27:19,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:19,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761972824] [2020-04-17 14:27:19,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:19,914 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 14:27:19,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761972824] [2020-04-17 14:27:19,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412790156] [2020-04-17 14:27:19,915 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 14:27:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:19,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:19,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:20,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:27:20,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:20,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:20,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085315369] [2020-04-17 14:27:20,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:20,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:20,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:20,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:20,160 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-04-17 14:27:20,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:20,627 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-04-17 14:27:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:27:20,628 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:20,629 INFO L225 Difference]: With dead ends: 219 [2020-04-17 14:27:20,629 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 14:27:20,630 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 14:27:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 14:27:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-04-17 14:27:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 14:27:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-04-17 14:27:20,633 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-04-17 14:27:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:20,633 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-04-17 14:27:20,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-04-17 14:27:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:20,634 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:20,634 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:20,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:20,835 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:20,835 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-04-17 14:27:20,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:20,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559717959] [2020-04-17 14:27:20,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:20,895 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 14:27:20,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559717959] [2020-04-17 14:27:20,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287743188] [2020-04-17 14:27:20,896 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 14:27:20,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:27:20,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:20,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:20,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:21,036 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 14:27:21,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:21,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:21,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79639949] [2020-04-17 14:27:21,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:21,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:21,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:21,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:21,037 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-04-17 14:27:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:21,272 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-04-17 14:27:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:27:21,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:21,273 INFO L225 Difference]: With dead ends: 197 [2020-04-17 14:27:21,273 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 14:27:21,274 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 14:27:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 14:27:21,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-04-17 14:27:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 14:27:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-04-17 14:27:21,278 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-04-17 14:27:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:21,278 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-04-17 14:27:21,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-04-17 14:27:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:21,278 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:21,279 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:21,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:21,482 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:21,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:21,482 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-04-17 14:27:21,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:21,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058332521] [2020-04-17 14:27:21,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:21,544 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 14:27:21,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058332521] [2020-04-17 14:27:21,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494674634] [2020-04-17 14:27:21,544 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 14:27:21,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:27:21,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:21,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:21,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:21,686 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 14:27:21,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:21,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:21,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531269870] [2020-04-17 14:27:21,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:21,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:21,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:21,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:21,687 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-04-17 14:27:21,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:21,933 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-04-17 14:27:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:27:21,934 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:21,935 INFO L225 Difference]: With dead ends: 202 [2020-04-17 14:27:21,935 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 14:27:21,935 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 14:27:21,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 14:27:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-04-17 14:27:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 14:27:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-04-17 14:27:21,939 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-04-17 14:27:21,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:21,939 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-04-17 14:27:21,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:21,939 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-04-17 14:27:21,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:21,940 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:21,940 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:22,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:22,140 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:22,141 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-04-17 14:27:22,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:22,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015304321] [2020-04-17 14:27:22,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:22,205 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 14:27:22,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015304321] [2020-04-17 14:27:22,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620649660] [2020-04-17 14:27:22,206 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 14:27:22,249 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:27:22,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:22,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:22,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:22,728 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 14:27:22,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:22,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:22,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224506331] [2020-04-17 14:27:22,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:22,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:22,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:22,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:22,730 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-04-17 14:27:22,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:22,987 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-04-17 14:27:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:27:22,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:22,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:22,988 INFO L225 Difference]: With dead ends: 197 [2020-04-17 14:27:22,989 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 14:27:22,989 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:27:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 14:27:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-04-17 14:27:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 14:27:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-04-17 14:27:22,992 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-04-17 14:27:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:22,992 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-04-17 14:27:22,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:22,992 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-04-17 14:27:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:22,992 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:22,992 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:23,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:23,193 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:23,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:23,194 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-04-17 14:27:23,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:23,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316288664] [2020-04-17 14:27:23,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:23,265 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 14:27:23,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316288664] [2020-04-17 14:27:23,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102359972] [2020-04-17 14:27:23,266 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 14:27:23,310 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:27:23,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:23,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:23,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:23,422 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 14:27:23,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:23,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:23,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106466709] [2020-04-17 14:27:23,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:23,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:23,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:23,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:23,423 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-04-17 14:27:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:23,794 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-04-17 14:27:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:27:23,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:23,795 INFO L225 Difference]: With dead ends: 214 [2020-04-17 14:27:23,795 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 14:27:23,796 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 14:27:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 14:27:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-04-17 14:27:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 14:27:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-04-17 14:27:23,800 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-04-17 14:27:23,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:23,800 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-04-17 14:27:23,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-04-17 14:27:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:23,801 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:23,801 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:24,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:24,004 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:24,005 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-04-17 14:27:24,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:24,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367369836] [2020-04-17 14:27:24,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:24,071 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 14:27:24,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367369836] [2020-04-17 14:27:24,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864831653] [2020-04-17 14:27:24,072 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 14:27:24,112 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:27:24,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:24,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:24,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:24,207 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 14:27:24,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:24,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:24,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623462300] [2020-04-17 14:27:24,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:24,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:24,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:24,208 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-04-17 14:27:24,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:24,557 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-04-17 14:27:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:27:24,558 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:24,559 INFO L225 Difference]: With dead ends: 217 [2020-04-17 14:27:24,559 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 14:27:24,560 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 14:27:24,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 14:27:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-04-17 14:27:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 14:27:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 14:27:24,564 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 14:27:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:24,565 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 14:27:24,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 14:27:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:24,565 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:24,565 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:24,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:24,769 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:24,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:24,775 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-04-17 14:27:24,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:24,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136594759] [2020-04-17 14:27:24,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:24,863 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 14:27:24,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136594759] [2020-04-17 14:27:24,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945702570] [2020-04-17 14:27:24,864 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 14:27:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:24,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:24,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:25,005 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 14:27:25,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:25,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:25,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127231433] [2020-04-17 14:27:25,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:25,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:25,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:25,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:25,007 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 14:27:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:25,364 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-04-17 14:27:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:27:25,365 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:25,366 INFO L225 Difference]: With dead ends: 211 [2020-04-17 14:27:25,366 INFO L226 Difference]: Without dead ends: 209 [2020-04-17 14:27:25,366 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:27:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-04-17 14:27:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-04-17 14:27:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 14:27:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 14:27:25,370 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 14:27:25,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:25,370 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 14:27:25,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 14:27:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:25,371 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:25,371 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:25,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:25,572 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-04-17 14:27:25,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:25,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711854215] [2020-04-17 14:27:25,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:25,634 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 14:27:25,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711854215] [2020-04-17 14:27:25,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066660426] [2020-04-17 14:27:25,635 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 14:27:25,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:27:25,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:25,676 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:25,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:25,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:25,758 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 14:27:25,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:25,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:25,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209736603] [2020-04-17 14:27:25,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:25,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:25,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:25,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:25,759 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 14:27:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:26,229 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-04-17 14:27:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:27:26,230 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:26,231 INFO L225 Difference]: With dead ends: 211 [2020-04-17 14:27:26,231 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 14:27:26,231 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 14:27:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 14:27:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-04-17 14:27:26,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 14:27:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 14:27:26,235 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 14:27:26,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:26,236 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 14:27:26,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 14:27:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:26,237 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:26,237 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:26,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:26,438 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:26,438 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-04-17 14:27:26,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:26,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088549663] [2020-04-17 14:27:26,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:26,503 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 14:27:26,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088549663] [2020-04-17 14:27:26,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491414442] [2020-04-17 14:27:26,504 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 14:27:26,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:27:26,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:26,548 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:26,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:26,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:26,670 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 14:27:26,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:26,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:26,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038352811] [2020-04-17 14:27:26,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:26,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:26,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:26,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:26,673 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 14:27:27,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:27,209 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-04-17 14:27:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:27:27,210 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:27,211 INFO L225 Difference]: With dead ends: 227 [2020-04-17 14:27:27,211 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 14:27:27,212 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:27:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 14:27:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-04-17 14:27:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 14:27:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 14:27:27,214 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 14:27:27,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:27,215 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 14:27:27,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 14:27:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:27,215 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:27,215 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:27,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:27,418 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:27,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:27,418 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-04-17 14:27:27,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:27,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231929342] [2020-04-17 14:27:27,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:27,481 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 14:27:27,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231929342] [2020-04-17 14:27:27,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46188795] [2020-04-17 14:27:27,482 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 14:27:27,534 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:27:27,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:27,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:27,535 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:27,632 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 14:27:27,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:27,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:27,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893380664] [2020-04-17 14:27:27,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:27,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:27,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:27,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:27,633 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 14:27:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:28,039 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-04-17 14:27:28,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:27:28,040 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:28,040 INFO L225 Difference]: With dead ends: 221 [2020-04-17 14:27:28,041 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 14:27:28,041 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 14:27:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 14:27:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-04-17 14:27:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 14:27:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 14:27:28,045 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 14:27:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:28,045 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 14:27:28,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 14:27:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:28,046 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:28,046 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:28,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:28,246 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-04-17 14:27:28,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:28,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57528145] [2020-04-17 14:27:28,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:28,306 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 14:27:28,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57528145] [2020-04-17 14:27:28,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356103139] [2020-04-17 14:27:28,307 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 14:27:28,349 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:27:28,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:28,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:28,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:28,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:28,443 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 14:27:28,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:28,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:28,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119740341] [2020-04-17 14:27:28,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:28,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:28,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:28,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:28,444 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 14:27:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:28,947 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-04-17 14:27:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:27:28,948 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:28,949 INFO L225 Difference]: With dead ends: 240 [2020-04-17 14:27:28,949 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 14:27:28,949 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:27:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 14:27:28,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-04-17 14:27:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 14:27:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-04-17 14:27:28,953 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-04-17 14:27:28,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:28,953 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-04-17 14:27:28,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-04-17 14:27:28,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:28,953 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:28,954 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:29,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:29,154 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:29,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:29,155 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-04-17 14:27:29,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:29,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923581623] [2020-04-17 14:27:29,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:29,217 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 14:27:29,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923581623] [2020-04-17 14:27:29,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099234470] [2020-04-17 14:27:29,218 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 14:27:29,256 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:27:29,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:29,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:29,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:29,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:29,352 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 14:27:29,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:29,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:29,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442513455] [2020-04-17 14:27:29,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:29,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:29,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:29,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:29,353 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-04-17 14:27:29,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:29,882 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-04-17 14:27:29,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:27:29,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:29,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:29,883 INFO L225 Difference]: With dead ends: 238 [2020-04-17 14:27:29,883 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 14:27:29,884 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 14:27:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 14:27:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-04-17 14:27:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 14:27:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 14:27:29,888 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 14:27:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:29,888 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 14:27:29,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 14:27:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:29,889 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:29,889 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:30,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:30,092 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:30,093 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-04-17 14:27:30,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:30,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442807653] [2020-04-17 14:27:30,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:30,155 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 14:27:30,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442807653] [2020-04-17 14:27:30,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886942761] [2020-04-17 14:27:30,155 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 14:27:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:30,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:30,204 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:30,313 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 14:27:30,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:30,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:30,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833925297] [2020-04-17 14:27:30,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:30,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:30,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:30,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:30,315 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 14:27:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:30,537 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-04-17 14:27:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:27:30,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:30,539 INFO L225 Difference]: With dead ends: 195 [2020-04-17 14:27:30,539 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 14:27:30,539 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:27:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 14:27:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-04-17 14:27:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 14:27:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 14:27:30,542 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 14:27:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:30,542 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 14:27:30,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:30,542 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 14:27:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:30,543 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:30,543 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:30,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:30,743 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:30,744 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-04-17 14:27:30,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:30,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002609780] [2020-04-17 14:27:30,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:30,816 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 14:27:30,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002609780] [2020-04-17 14:27:30,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939898203] [2020-04-17 14:27:30,817 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 14:27:30,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:27:30,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:30,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:30,858 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:30,955 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 14:27:30,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:30,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:30,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432887085] [2020-04-17 14:27:30,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:30,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:30,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:30,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:30,957 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 14:27:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:31,366 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-04-17 14:27:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:27:31,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:31,367 INFO L225 Difference]: With dead ends: 206 [2020-04-17 14:27:31,367 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 14:27:31,368 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 14:27:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 14:27:31,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-04-17 14:27:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 14:27:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-04-17 14:27:31,375 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-04-17 14:27:31,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:31,375 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-04-17 14:27:31,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-04-17 14:27:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:31,375 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:31,376 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:31,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:31,579 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:31,579 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-04-17 14:27:31,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:31,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892126534] [2020-04-17 14:27:31,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:31,645 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 14:27:31,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892126534] [2020-04-17 14:27:31,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849638708] [2020-04-17 14:27:31,646 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 14:27:31,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:27:31,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:31,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:31,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:31,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:32,249 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 14:27:32,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:32,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 14:27:32,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875708824] [2020-04-17 14:27:32,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:27:32,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:32,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:27:32,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-04-17 14:27:32,250 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-04-17 14:27:32,864 WARN L192 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2020-04-17 14:27:33,337 WARN L192 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-17 14:27:34,825 WARN L192 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-04-17 14:27:39,058 WARN L192 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-04-17 14:27:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:39,071 INFO L93 Difference]: Finished difference Result 241 states and 570 transitions. [2020-04-17 14:27:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:27:39,072 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 14:27:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:39,073 INFO L225 Difference]: With dead ends: 241 [2020-04-17 14:27:39,073 INFO L226 Difference]: Without dead ends: 236 [2020-04-17 14:27:39,074 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=376, Invalid=881, Unknown=3, NotChecked=0, Total=1260 [2020-04-17 14:27:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-04-17 14:27:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 139. [2020-04-17 14:27:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 14:27:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-04-17 14:27:39,077 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-04-17 14:27:39,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:39,077 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-04-17 14:27:39,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:27:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-04-17 14:27:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:39,078 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:39,078 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:39,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:39,281 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:39,281 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-04-17 14:27:39,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:39,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344318224] [2020-04-17 14:27:39,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:39,369 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 14:27:39,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344318224] [2020-04-17 14:27:39,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304833084] [2020-04-17 14:27:39,369 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 14:27:39,413 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:27:39,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:39,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:39,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:39,542 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 14:27:39,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:39,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:39,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164752451] [2020-04-17 14:27:39,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:39,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:39,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:39,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:39,543 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-04-17 14:27:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:39,772 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 14:27:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:27:39,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:39,774 INFO L225 Difference]: With dead ends: 194 [2020-04-17 14:27:39,774 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 14:27:39,774 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:27:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 14:27:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-04-17 14:27:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 14:27:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-04-17 14:27:39,777 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-04-17 14:27:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:39,777 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-04-17 14:27:39,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-04-17 14:27:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:39,778 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:39,778 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:39,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:39,979 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:39,979 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-04-17 14:27:39,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:39,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658531194] [2020-04-17 14:27:39,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:40,053 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 14:27:40,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658531194] [2020-04-17 14:27:40,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807284235] [2020-04-17 14:27:40,054 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 14:27:40,092 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:27:40,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:40,093 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:40,094 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:40,661 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 14:27:40,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:40,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:40,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680171219] [2020-04-17 14:27:40,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:40,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:40,663 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-04-17 14:27:40,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:40,925 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-04-17 14:27:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:27:40,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:40,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:40,927 INFO L225 Difference]: With dead ends: 205 [2020-04-17 14:27:40,927 INFO L226 Difference]: Without dead ends: 203 [2020-04-17 14:27:40,927 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 14:27:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-04-17 14:27:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-04-17 14:27:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 14:27:40,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-04-17 14:27:40,931 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-04-17 14:27:40,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:40,931 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-04-17 14:27:40,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:40,932 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-04-17 14:27:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:40,932 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:40,932 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:41,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:41,133 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:41,134 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-04-17 14:27:41,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:41,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852579757] [2020-04-17 14:27:41,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:41,207 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 14:27:41,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852579757] [2020-04-17 14:27:41,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901147664] [2020-04-17 14:27:41,208 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 14:27:41,255 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:27:41,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:41,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:41,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:41,373 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 14:27:41,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:41,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:41,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882491800] [2020-04-17 14:27:41,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:41,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:41,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:41,375 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-04-17 14:27:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:41,616 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 14:27:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:27:41,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:41,618 INFO L225 Difference]: With dead ends: 201 [2020-04-17 14:27:41,618 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 14:27:41,618 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:27:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 14:27:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-04-17 14:27:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 14:27:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-04-17 14:27:41,623 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-04-17 14:27:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:41,623 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-04-17 14:27:41,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-04-17 14:27:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:41,624 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:41,624 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:41,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:41,828 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:41,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-04-17 14:27:41,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:41,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209505585] [2020-04-17 14:27:41,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:41,887 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 14:27:41,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209505585] [2020-04-17 14:27:41,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110403391] [2020-04-17 14:27:41,888 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 14:27:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:41,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:41,931 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:42,043 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 14:27:42,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:42,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:42,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105650122] [2020-04-17 14:27:42,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:42,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:42,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:42,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:42,045 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-04-17 14:27:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:42,259 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 14:27:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:27:42,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:42,260 INFO L225 Difference]: With dead ends: 194 [2020-04-17 14:27:42,261 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 14:27:42,261 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 14:27:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 14:27:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-04-17 14:27:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 14:27:42,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-04-17 14:27:42,264 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-04-17 14:27:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:42,264 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-04-17 14:27:42,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-04-17 14:27:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:42,265 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:42,265 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:42,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:42,466 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:42,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:42,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-04-17 14:27:42,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:42,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504560470] [2020-04-17 14:27:42,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:42,531 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 14:27:42,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504560470] [2020-04-17 14:27:42,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203399359] [2020-04-17 14:27:42,532 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 14:27:42,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:27:42,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:42,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:42,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:43,149 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 14:27:43,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:43,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:43,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085870254] [2020-04-17 14:27:43,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:43,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:43,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:43,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:43,151 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-04-17 14:27:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:43,456 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-04-17 14:27:43,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:27:43,457 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:43,458 INFO L225 Difference]: With dead ends: 209 [2020-04-17 14:27:43,458 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 14:27:43,458 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:27:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 14:27:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-04-17 14:27:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 14:27:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-04-17 14:27:43,462 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-04-17 14:27:43,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:43,462 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-04-17 14:27:43,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-04-17 14:27:43,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:43,463 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:43,463 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:43,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:43,664 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:43,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-04-17 14:27:43,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:43,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779763590] [2020-04-17 14:27:43,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:43,730 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 14:27:43,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779763590] [2020-04-17 14:27:43,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686460952] [2020-04-17 14:27:43,731 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 14:27:43,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:27:43,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:43,776 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:43,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:43,880 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 14:27:43,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:43,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:43,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29832502] [2020-04-17 14:27:43,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:43,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:43,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:43,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:43,881 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-04-17 14:27:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:44,150 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-04-17 14:27:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:27:44,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:44,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:44,151 INFO L225 Difference]: With dead ends: 202 [2020-04-17 14:27:44,151 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 14:27:44,151 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 14:27:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 14:27:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-04-17 14:27:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 14:27:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 14:27:44,153 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 14:27:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:44,153 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 14:27:44,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 14:27:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:44,154 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:44,154 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:44,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:44,355 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:44,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-04-17 14:27:44,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:44,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423214204] [2020-04-17 14:27:44,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:44,415 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 14:27:44,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423214204] [2020-04-17 14:27:44,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386619389] [2020-04-17 14:27:44,416 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 14:27:44,456 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:27:44,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:44,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:44,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:44,563 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 14:27:44,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:44,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:44,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276529883] [2020-04-17 14:27:44,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:44,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:44,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:44,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:44,565 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-04-17 14:27:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:44,823 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 14:27:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:27:44,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:44,825 INFO L225 Difference]: With dead ends: 201 [2020-04-17 14:27:44,825 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 14:27:44,825 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 14:27:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 14:27:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-04-17 14:27:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 14:27:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-04-17 14:27:44,829 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-04-17 14:27:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:44,829 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-04-17 14:27:44,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-04-17 14:27:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:44,830 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:44,830 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:45,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:45,031 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:45,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-04-17 14:27:45,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:45,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193327126] [2020-04-17 14:27:45,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:45,099 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 14:27:45,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193327126] [2020-04-17 14:27:45,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574247517] [2020-04-17 14:27:45,100 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 14:27:45,147 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:27:45,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:45,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:45,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:45,254 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 14:27:45,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:45,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:45,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572507365] [2020-04-17 14:27:45,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:45,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:45,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:45,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:45,256 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-04-17 14:27:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:45,624 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-04-17 14:27:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:27:45,625 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:45,626 INFO L225 Difference]: With dead ends: 215 [2020-04-17 14:27:45,626 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 14:27:45,626 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 14:27:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 14:27:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-04-17 14:27:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 14:27:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 14:27:45,630 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 14:27:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:45,630 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 14:27:45,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 14:27:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:45,631 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:45,631 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:45,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:45,834 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:45,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-04-17 14:27:45,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:45,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449179142] [2020-04-17 14:27:45,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:45,896 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 14:27:45,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449179142] [2020-04-17 14:27:45,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771714254] [2020-04-17 14:27:45,897 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:27:45,942 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:27:45,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:45,944 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:45,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:46,036 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 14:27:46,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:46,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:46,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012174310] [2020-04-17 14:27:46,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:46,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:46,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:46,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:46,037 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 14:27:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:46,374 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-04-17 14:27:46,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:27:46,374 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:46,375 INFO L225 Difference]: With dead ends: 196 [2020-04-17 14:27:46,375 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 14:27:46,376 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 14:27:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 14:27:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-04-17 14:27:46,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 14:27:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 14:27:46,379 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 14:27:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:46,379 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 14:27:46,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 14:27:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:46,380 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:46,380 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:46,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:46,581 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-04-17 14:27:46,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:46,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191684341] [2020-04-17 14:27:46,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:46,651 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 14:27:46,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191684341] [2020-04-17 14:27:46,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297762482] [2020-04-17 14:27:46,651 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 14:27:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:46,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:46,695 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:46,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:46,777 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 14:27:46,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:46,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:46,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050561172] [2020-04-17 14:27:46,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:46,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:46,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:46,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:46,778 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 14:27:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:47,032 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-04-17 14:27:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:27:47,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:47,033 INFO L225 Difference]: With dead ends: 191 [2020-04-17 14:27:47,033 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 14:27:47,034 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 14:27:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 14:27:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-04-17 14:27:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 14:27:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 14:27:47,037 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 14:27:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:47,037 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 14:27:47,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 14:27:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:47,038 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:47,038 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:47,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:47,241 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:47,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:47,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-04-17 14:27:47,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:47,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384332140] [2020-04-17 14:27:47,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:47,306 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 14:27:47,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384332140] [2020-04-17 14:27:47,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792582206] [2020-04-17 14:27:47,307 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 14:27:47,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:27:47,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:47,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:47,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:47,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:47,452 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 14:27:47,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:47,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:47,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796079253] [2020-04-17 14:27:47,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:47,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:47,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:47,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:47,453 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 14:27:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:47,934 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-04-17 14:27:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:27:47,935 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:47,936 INFO L225 Difference]: With dead ends: 232 [2020-04-17 14:27:47,936 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 14:27:47,936 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 14:27:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 14:27:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-04-17 14:27:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 14:27:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 14:27:47,940 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 14:27:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:47,940 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 14:27:47,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 14:27:47,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:47,940 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:47,941 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:48,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:48,141 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:48,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:48,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-04-17 14:27:48,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:48,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744488553] [2020-04-17 14:27:48,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:48,228 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 14:27:48,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744488553] [2020-04-17 14:27:48,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057624927] [2020-04-17 14:27:48,229 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 14:27:48,273 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:27:48,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:48,275 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:27:48,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:48,394 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 14:27:48,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:48,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:48,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007455295] [2020-04-17 14:27:48,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:48,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:48,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:48,396 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 14:27:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:48,979 INFO L93 Difference]: Finished difference Result 243 states and 560 transitions. [2020-04-17 14:27:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:27:48,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:48,980 INFO L225 Difference]: With dead ends: 243 [2020-04-17 14:27:48,981 INFO L226 Difference]: Without dead ends: 239 [2020-04-17 14:27:48,981 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:27:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-04-17 14:27:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 144. [2020-04-17 14:27:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 14:27:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 14:27:48,985 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 14:27:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:48,985 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 14:27:48,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 14:27:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:48,985 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:48,985 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:49,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:49,186 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:49,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-04-17 14:27:49,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:49,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247459986] [2020-04-17 14:27:49,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:49,253 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 14:27:49,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247459986] [2020-04-17 14:27:49,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049163199] [2020-04-17 14:27:49,254 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:27:49,298 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:27:49,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:49,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:49,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:50,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:27:50,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:50,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:50,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392509606] [2020-04-17 14:27:50,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:50,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:50,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:50,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=143, Unknown=2, NotChecked=0, Total=210 [2020-04-17 14:27:50,817 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 14:27:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:53,840 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-04-17 14:27:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:27:53,840 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:53,841 INFO L225 Difference]: With dead ends: 254 [2020-04-17 14:27:53,841 INFO L226 Difference]: Without dead ends: 246 [2020-04-17 14:27:53,842 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=345, Invalid=774, Unknown=3, NotChecked=0, Total=1122 [2020-04-17 14:27:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-17 14:27:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-04-17 14:27:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 14:27:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-04-17 14:27:53,845 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-04-17 14:27:53,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:53,845 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-04-17 14:27:53,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-04-17 14:27:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:53,846 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:53,846 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:54,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:54,050 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-04-17 14:27:54,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:54,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940033925] [2020-04-17 14:27:54,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:27:54,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940033925] [2020-04-17 14:27:54,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685206180] [2020-04-17 14:27:54,115 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 14:27:54,166 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:27:54,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:54,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:54,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:54,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:54,274 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 14:27:54,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:54,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:54,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717638763] [2020-04-17 14:27:54,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:54,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:54,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:54,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:54,275 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-04-17 14:27:54,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:54,888 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-04-17 14:27:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:27:54,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:54,889 INFO L225 Difference]: With dead ends: 246 [2020-04-17 14:27:54,890 INFO L226 Difference]: Without dead ends: 238 [2020-04-17 14:27:54,890 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:27:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-04-17 14:27:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-04-17 14:27:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 14:27:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-04-17 14:27:54,895 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-04-17 14:27:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:54,895 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-04-17 14:27:54,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-04-17 14:27:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:54,895 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:54,895 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:55,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:55,096 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-04-17 14:27:55,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:55,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692238817] [2020-04-17 14:27:55,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:55,157 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 14:27:55,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692238817] [2020-04-17 14:27:55,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080475599] [2020-04-17 14:27:55,158 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 14:27:55,200 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:27:55,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:55,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:55,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:55,321 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 14:27:55,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:55,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:55,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940212084] [2020-04-17 14:27:55,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:55,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:55,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:55,322 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-04-17 14:27:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:55,640 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-04-17 14:27:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:27:55,640 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:55,641 INFO L225 Difference]: With dead ends: 208 [2020-04-17 14:27:55,641 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 14:27:55,642 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 14:27:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 14:27:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-04-17 14:27:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 14:27:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-04-17 14:27:55,645 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-04-17 14:27:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:55,645 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-04-17 14:27:55,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-04-17 14:27:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:55,646 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:55,646 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:55,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:55,847 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:55,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-04-17 14:27:55,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:55,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161159471] [2020-04-17 14:27:55,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:55,911 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 14:27:55,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161159471] [2020-04-17 14:27:55,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080259] [2020-04-17 14:27:55,911 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 14:27:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:55,957 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:55,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:56,038 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 14:27:56,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:56,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:56,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201728943] [2020-04-17 14:27:56,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:56,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:56,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:56,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:56,040 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-04-17 14:27:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:56,460 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-04-17 14:27:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:27:56,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:56,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:56,461 INFO L225 Difference]: With dead ends: 215 [2020-04-17 14:27:56,461 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 14:27:56,462 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 14:27:56,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 14:27:56,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-04-17 14:27:56,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 14:27:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 14:27:56,465 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 14:27:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:56,465 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 14:27:56,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:56,465 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 14:27:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:56,465 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:56,465 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:56,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:56,666 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:56,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:56,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-04-17 14:27:56,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:56,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261211964] [2020-04-17 14:27:56,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:56,730 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 14:27:56,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261211964] [2020-04-17 14:27:56,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254007452] [2020-04-17 14:27:56,731 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 14:27:56,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:27:56,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:56,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:56,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:56,844 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:56,851 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 14:27:56,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:56,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:56,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845235235] [2020-04-17 14:27:56,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:56,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:56,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:56,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:56,852 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 14:27:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:57,317 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-04-17 14:27:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:27:57,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:57,319 INFO L225 Difference]: With dead ends: 236 [2020-04-17 14:27:57,319 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 14:27:57,319 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 14:27:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 14:27:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-04-17 14:27:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 14:27:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 14:27:57,323 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 14:27:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:57,323 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 14:27:57,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 14:27:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:57,324 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:57,324 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:57,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:57,527 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:57,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-04-17 14:27:57,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:57,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796581651] [2020-04-17 14:27:57,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:57,596 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 14:27:57,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796581651] [2020-04-17 14:27:57,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200477084] [2020-04-17 14:27:57,597 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 14:27:57,641 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:27:57,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:57,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:57,642 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:57,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:57,725 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 14:27:57,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:57,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:57,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258889639] [2020-04-17 14:27:57,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:57,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:57,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:57,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:57,726 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 14:27:58,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:58,233 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-04-17 14:27:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:27:58,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:58,234 INFO L225 Difference]: With dead ends: 241 [2020-04-17 14:27:58,234 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 14:27:58,235 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:27:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 14:27:58,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-04-17 14:27:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-04-17 14:27:58,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-04-17 14:27:58,238 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-04-17 14:27:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:58,238 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-04-17 14:27:58,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-04-17 14:27:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:58,239 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:58,239 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:58,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:58,442 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-04-17 14:27:58,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:58,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122021985] [2020-04-17 14:27:58,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:58,523 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 14:27:58,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122021985] [2020-04-17 14:27:58,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648730121] [2020-04-17 14:27:58,524 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 14:27:58,569 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:27:58,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:58,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:27:58,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:58,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:58,661 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 14:27:58,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:58,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 14:27:58,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654226691] [2020-04-17 14:27:58,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:58,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:58,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:58,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:58,662 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-04-17 14:27:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:27:59,147 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-04-17 14:27:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:27:59,148 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:27:59,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:27:59,150 INFO L225 Difference]: With dead ends: 232 [2020-04-17 14:27:59,150 INFO L226 Difference]: Without dead ends: 224 [2020-04-17 14:27:59,150 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 14:27:59,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-04-17 14:27:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-04-17 14:27:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 14:27:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-04-17 14:27:59,155 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-04-17 14:27:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:27:59,155 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-04-17 14:27:59,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:27:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-04-17 14:27:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:27:59,155 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:27:59,156 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:27:59,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:27:59,360 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:27:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:27:59,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-04-17 14:27:59,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:27:59,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253827929] [2020-04-17 14:27:59,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:27:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:27:59,428 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 14:27:59,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253827929] [2020-04-17 14:27:59,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960484074] [2020-04-17 14:27:59,437 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 14:27:59,479 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 14:27:59,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:27:59,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:27:59,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:27:59,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:27:59,703 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 14:27:59,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:27:59,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 13 [2020-04-17 14:27:59,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002607102] [2020-04-17 14:27:59,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:27:59,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:27:59,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:27:59,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:27:59,706 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 15 states. [2020-04-17 14:28:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:00,212 INFO L93 Difference]: Finished difference Result 155 states and 365 transitions. [2020-04-17 14:28:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:28:00,212 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 14:28:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:00,214 INFO L225 Difference]: With dead ends: 155 [2020-04-17 14:28:00,214 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 14:28:00,214 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:28:00,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 14:28:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 117. [2020-04-17 14:28:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 14:28:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2020-04-17 14:28:00,218 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 13 [2020-04-17 14:28:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:00,218 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2020-04-17 14:28:00,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:28:00,219 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2020-04-17 14:28:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:28:00,219 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:00,219 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:00,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:00,424 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-04-17 14:28:00,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:00,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466091860] [2020-04-17 14:28:00,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:00,567 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 14:28:00,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466091860] [2020-04-17 14:28:00,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524322386] [2020-04-17 14:28:00,568 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 14:28:00,637 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 14:28:00,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:00,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:28:00,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:00,716 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 14:28:00,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 14:28:00,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2020-04-17 14:28:00,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319657758] [2020-04-17 14:28:00,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 14:28:00,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:00,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 14:28:00,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:28:00,718 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 8 states. [2020-04-17 14:28:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:00,747 INFO L93 Difference]: Finished difference Result 190 states and 483 transitions. [2020-04-17 14:28:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:28:00,748 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-04-17 14:28:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:00,748 INFO L225 Difference]: With dead ends: 190 [2020-04-17 14:28:00,749 INFO L226 Difference]: Without dead ends: 178 [2020-04-17 14:28:00,749 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 14:28:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-04-17 14:28:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-04-17 14:28:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-04-17 14:28:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 454 transitions. [2020-04-17 14:28:00,752 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 454 transitions. Word has length 13 [2020-04-17 14:28:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:00,752 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 454 transitions. [2020-04-17 14:28:00,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 14:28:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 454 transitions. [2020-04-17 14:28:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:00,753 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:00,753 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:00,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:00,958 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:00,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:00,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-04-17 14:28:00,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:00,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721127394] [2020-04-17 14:28:00,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:01,055 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 14:28:01,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721127394] [2020-04-17 14:28:01,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949677520] [2020-04-17 14:28:01,056 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 14:28:01,099 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:28:01,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:01,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:01,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:01,225 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 14:28:01,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:01,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:28:01,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218583951] [2020-04-17 14:28:01,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:28:01,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:28:01,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:28:01,226 INFO L87 Difference]: Start difference. First operand 178 states and 454 transitions. Second operand 17 states. [2020-04-17 14:28:01,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:01,286 INFO L93 Difference]: Finished difference Result 216 states and 530 transitions. [2020-04-17 14:28:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:28:01,286 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:28:01,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:01,287 INFO L225 Difference]: With dead ends: 216 [2020-04-17 14:28:01,287 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 14:28:01,288 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:28:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 14:28:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 186. [2020-04-17 14:28:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-04-17 14:28:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 478 transitions. [2020-04-17 14:28:01,291 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 478 transitions. Word has length 14 [2020-04-17 14:28:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:01,291 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 478 transitions. [2020-04-17 14:28:01,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:28:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 478 transitions. [2020-04-17 14:28:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:01,292 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:01,292 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:01,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:01,492 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:01,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:01,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-04-17 14:28:01,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:01,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108354857] [2020-04-17 14:28:01,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:01,587 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 14:28:01,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108354857] [2020-04-17 14:28:01,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579938178] [2020-04-17 14:28:01,588 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 14:28:01,634 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:28:01,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:01,635 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:01,635 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:01,769 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 14:28:01,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:01,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:28:01,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608388044] [2020-04-17 14:28:01,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:28:01,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:01,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:28:01,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:28:01,770 INFO L87 Difference]: Start difference. First operand 186 states and 478 transitions. Second operand 17 states. [2020-04-17 14:28:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:01,958 INFO L93 Difference]: Finished difference Result 232 states and 562 transitions. [2020-04-17 14:28:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:28:01,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:28:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:01,959 INFO L225 Difference]: With dead ends: 232 [2020-04-17 14:28:01,959 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 14:28:01,960 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:28:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 14:28:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 184. [2020-04-17 14:28:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 14:28:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 14:28:01,964 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 14:28:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:01,964 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 14:28:01,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:28:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 14:28:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:01,964 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:01,964 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:02,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:02,165 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-04-17 14:28:02,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:02,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052472630] [2020-04-17 14:28:02,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:02,275 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 14:28:02,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052472630] [2020-04-17 14:28:02,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219160465] [2020-04-17 14:28:02,276 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 14:28:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:02,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:02,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:06,726 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 14:28:06,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:06,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:28:06,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324312990] [2020-04-17 14:28:06,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:28:06,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:06,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:28:06,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:28:06,728 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 17 states. [2020-04-17 14:28:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:06,969 INFO L93 Difference]: Finished difference Result 250 states and 600 transitions. [2020-04-17 14:28:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:28:06,970 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:28:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:06,971 INFO L225 Difference]: With dead ends: 250 [2020-04-17 14:28:06,971 INFO L226 Difference]: Without dead ends: 248 [2020-04-17 14:28:06,971 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:28:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-04-17 14:28:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 182. [2020-04-17 14:28:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-04-17 14:28:06,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 466 transitions. [2020-04-17 14:28:06,975 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 466 transitions. Word has length 14 [2020-04-17 14:28:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:06,975 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 466 transitions. [2020-04-17 14:28:06,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:28:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 466 transitions. [2020-04-17 14:28:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:06,975 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:06,976 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:07,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:07,176 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-04-17 14:28:07,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:07,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766865915] [2020-04-17 14:28:07,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:07,263 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 14:28:07,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766865915] [2020-04-17 14:28:07,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021470408] [2020-04-17 14:28:07,266 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 14:28:07,313 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:28:07,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:07,315 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:07,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:09,364 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 14:28:09,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:09,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 14:28:09,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531978400] [2020-04-17 14:28:09,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:28:09,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:09,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:28:09,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=205, Unknown=2, NotChecked=0, Total=306 [2020-04-17 14:28:09,366 INFO L87 Difference]: Start difference. First operand 182 states and 466 transitions. Second operand 18 states. [2020-04-17 14:28:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:12,243 INFO L93 Difference]: Finished difference Result 254 states and 606 transitions. [2020-04-17 14:28:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:28:12,243 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 14:28:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:12,244 INFO L225 Difference]: With dead ends: 254 [2020-04-17 14:28:12,244 INFO L226 Difference]: Without dead ends: 252 [2020-04-17 14:28:12,245 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=209, Invalid=389, Unknown=2, NotChecked=0, Total=600 [2020-04-17 14:28:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-04-17 14:28:12,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 184. [2020-04-17 14:28:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 14:28:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 14:28:12,249 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 14:28:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:12,249 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 14:28:12,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:28:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 14:28:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:12,250 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:12,250 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:12,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:12,454 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:12,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:12,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-04-17 14:28:12,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:12,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343709890] [2020-04-17 14:28:12,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:12,562 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 14:28:12,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343709890] [2020-04-17 14:28:12,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20044664] [2020-04-17 14:28:12,562 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 14:28:12,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:28:12,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:12,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:12,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:12,791 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 14:28:12,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:12,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:28:12,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759554433] [2020-04-17 14:28:12,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:28:12,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:12,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:28:12,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:28:12,792 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 17 states. [2020-04-17 14:28:13,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:13,200 INFO L93 Difference]: Finished difference Result 264 states and 626 transitions. [2020-04-17 14:28:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:28:13,201 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:28:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:13,202 INFO L225 Difference]: With dead ends: 264 [2020-04-17 14:28:13,202 INFO L226 Difference]: Without dead ends: 262 [2020-04-17 14:28:13,202 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:28:13,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-04-17 14:28:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 184. [2020-04-17 14:28:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 14:28:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 14:28:13,206 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 14:28:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:13,207 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 14:28:13,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:28:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 14:28:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:13,207 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:13,208 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:13,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:13,411 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:13,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-04-17 14:28:13,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:13,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466302875] [2020-04-17 14:28:13,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:13,554 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 14:28:13,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466302875] [2020-04-17 14:28:13,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528057950] [2020-04-17 14:28:13,555 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 14:28:13,626 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:28:13,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:13,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:13,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:24,070 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-17 14:28:24,071 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 14:28:24,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:24,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 14:28:24,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551468737] [2020-04-17 14:28:24,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:28:24,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:24,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:28:24,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=206, Unknown=4, NotChecked=0, Total=306 [2020-04-17 14:28:24,072 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 18 states. [2020-04-17 14:28:26,393 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 14:28:30,664 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29 [2020-04-17 14:28:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:36,901 INFO L93 Difference]: Finished difference Result 264 states and 626 transitions. [2020-04-17 14:28:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:28:36,901 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 14:28:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:36,902 INFO L225 Difference]: With dead ends: 264 [2020-04-17 14:28:36,902 INFO L226 Difference]: Without dead ends: 262 [2020-04-17 14:28:36,903 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=209, Invalid=387, Unknown=4, NotChecked=0, Total=600 [2020-04-17 14:28:36,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-04-17 14:28:36,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 180. [2020-04-17 14:28:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-04-17 14:28:36,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 460 transitions. [2020-04-17 14:28:36,906 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 460 transitions. Word has length 14 [2020-04-17 14:28:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:36,906 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 460 transitions. [2020-04-17 14:28:36,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:28:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 460 transitions. [2020-04-17 14:28:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:36,906 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:36,907 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:37,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:37,107 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:37,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-04-17 14:28:37,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:37,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368667834] [2020-04-17 14:28:37,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:37,192 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 14:28:37,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368667834] [2020-04-17 14:28:37,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100580612] [2020-04-17 14:28:37,193 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 14:28:37,235 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:28:37,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:37,236 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:37,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:37,382 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 14:28:37,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:37,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:28:37,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855034874] [2020-04-17 14:28:37,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:28:37,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:37,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:28:37,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:28:37,384 INFO L87 Difference]: Start difference. First operand 180 states and 460 transitions. Second operand 17 states. [2020-04-17 14:28:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:37,681 INFO L93 Difference]: Finished difference Result 252 states and 602 transitions. [2020-04-17 14:28:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:28:37,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:28:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:37,683 INFO L225 Difference]: With dead ends: 252 [2020-04-17 14:28:37,683 INFO L226 Difference]: Without dead ends: 250 [2020-04-17 14:28:37,683 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:28:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-04-17 14:28:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 183. [2020-04-17 14:28:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-04-17 14:28:37,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2020-04-17 14:28:37,686 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 14 [2020-04-17 14:28:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:37,687 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2020-04-17 14:28:37,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:28:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2020-04-17 14:28:37,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:37,687 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:37,688 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:37,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:37,888 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:37,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-04-17 14:28:37,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:37,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542470043] [2020-04-17 14:28:37,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:37,984 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 14:28:37,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542470043] [2020-04-17 14:28:37,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278752435] [2020-04-17 14:28:37,985 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 14:28:38,025 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:28:38,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:38,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:38,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:38,527 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 14:28:38,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:38,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:28:38,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822533982] [2020-04-17 14:28:38,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:28:38,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:38,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:28:38,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:28:38,529 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand 17 states. [2020-04-17 14:28:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:38,823 INFO L93 Difference]: Finished difference Result 268 states and 634 transitions. [2020-04-17 14:28:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:28:38,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:28:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:38,824 INFO L225 Difference]: With dead ends: 268 [2020-04-17 14:28:38,825 INFO L226 Difference]: Without dead ends: 266 [2020-04-17 14:28:38,825 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 14:28:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-04-17 14:28:38,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 184. [2020-04-17 14:28:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 14:28:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 14:28:38,829 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 14:28:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:38,829 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 14:28:38,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:28:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 14:28:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:38,830 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:38,830 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:39,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:39,031 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:39,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-04-17 14:28:39,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:39,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147018177] [2020-04-17 14:28:39,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:39,116 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 14:28:39,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147018177] [2020-04-17 14:28:39,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453951611] [2020-04-17 14:28:39,117 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 14:28:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:39,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:39,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:39,274 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 14:28:39,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:39,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:28:39,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527357171] [2020-04-17 14:28:39,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:28:39,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:39,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:28:39,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:28:39,275 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 17 states. [2020-04-17 14:28:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:39,523 INFO L93 Difference]: Finished difference Result 267 states and 635 transitions. [2020-04-17 14:28:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:28:39,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:28:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:39,524 INFO L225 Difference]: With dead ends: 267 [2020-04-17 14:28:39,525 INFO L226 Difference]: Without dead ends: 265 [2020-04-17 14:28:39,525 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 14:28:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-04-17 14:28:39,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 183. [2020-04-17 14:28:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-04-17 14:28:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2020-04-17 14:28:39,529 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 14 [2020-04-17 14:28:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:39,529 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2020-04-17 14:28:39,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:28:39,529 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2020-04-17 14:28:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:39,530 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:39,530 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:39,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:39,731 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-04-17 14:28:39,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:39,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167899592] [2020-04-17 14:28:39,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:39,841 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 14:28:39,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167899592] [2020-04-17 14:28:39,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494356879] [2020-04-17 14:28:39,841 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 14:28:39,895 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:28:39,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:39,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:39,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:40,024 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 14:28:40,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:40,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:28:40,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182044996] [2020-04-17 14:28:40,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:28:40,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:40,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:28:40,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:28:40,026 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand 17 states. [2020-04-17 14:28:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:40,248 INFO L93 Difference]: Finished difference Result 246 states and 586 transitions. [2020-04-17 14:28:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:28:40,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:28:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:40,249 INFO L225 Difference]: With dead ends: 246 [2020-04-17 14:28:40,249 INFO L226 Difference]: Without dead ends: 236 [2020-04-17 14:28:40,250 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 14:28:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-04-17 14:28:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 180. [2020-04-17 14:28:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-04-17 14:28:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 458 transitions. [2020-04-17 14:28:40,264 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 458 transitions. Word has length 14 [2020-04-17 14:28:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:40,264 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 458 transitions. [2020-04-17 14:28:40,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:28:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 458 transitions. [2020-04-17 14:28:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:40,265 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:40,265 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:40,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:40,468 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:40,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:40,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-04-17 14:28:40,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:40,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834239689] [2020-04-17 14:28:40,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:40,582 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 14:28:40,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834239689] [2020-04-17 14:28:40,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254208807] [2020-04-17 14:28:40,583 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 14:28:40,639 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 14:28:40,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:40,641 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:40,641 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:40,788 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 14:28:40,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:40,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:28:40,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436329295] [2020-04-17 14:28:40,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:28:40,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:40,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:28:40,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:28:40,790 INFO L87 Difference]: Start difference. First operand 180 states and 458 transitions. Second operand 17 states. [2020-04-17 14:28:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:40,993 INFO L93 Difference]: Finished difference Result 244 states and 586 transitions. [2020-04-17 14:28:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:28:40,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:28:40,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:40,994 INFO L225 Difference]: With dead ends: 244 [2020-04-17 14:28:40,994 INFO L226 Difference]: Without dead ends: 242 [2020-04-17 14:28:40,995 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 14:28:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-04-17 14:28:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2020-04-17 14:28:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-04-17 14:28:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 471 transitions. [2020-04-17 14:28:40,998 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 471 transitions. Word has length 14 [2020-04-17 14:28:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:40,998 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 471 transitions. [2020-04-17 14:28:40,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:28:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 471 transitions. [2020-04-17 14:28:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:40,999 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:40,999 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:41,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:41,200 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:41,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:41,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-04-17 14:28:41,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:41,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810082579] [2020-04-17 14:28:41,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:41,297 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 14:28:41,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810082579] [2020-04-17 14:28:41,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124952060] [2020-04-17 14:28:41,298 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 14:28:41,336 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:28:41,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:41,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:41,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:42,539 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 14:28:42,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:42,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:28:42,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397136631] [2020-04-17 14:28:42,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:28:42,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:42,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:28:42,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:28:42,540 INFO L87 Difference]: Start difference. First operand 185 states and 471 transitions. Second operand 17 states. [2020-04-17 14:28:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:28:42,781 INFO L93 Difference]: Finished difference Result 257 states and 610 transitions. [2020-04-17 14:28:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:28:42,781 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:28:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:28:42,782 INFO L225 Difference]: With dead ends: 257 [2020-04-17 14:28:42,782 INFO L226 Difference]: Without dead ends: 255 [2020-04-17 14:28:42,782 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:28:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-04-17 14:28:42,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 184. [2020-04-17 14:28:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 14:28:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 468 transitions. [2020-04-17 14:28:42,787 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 468 transitions. Word has length 14 [2020-04-17 14:28:42,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:28:42,787 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 468 transitions. [2020-04-17 14:28:42,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:28:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 468 transitions. [2020-04-17 14:28:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:28:42,788 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:28:42,788 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:28:42,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:28:42,991 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:28:42,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:28:42,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-04-17 14:28:42,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:28:42,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604457059] [2020-04-17 14:28:42,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:28:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:28:43,093 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 14:28:43,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604457059] [2020-04-17 14:28:43,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102547289] [2020-04-17 14:28:43,094 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 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 14:28:43,136 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:28:43,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:28:43,137 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:28:43,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:28:43,367 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 14:28:55,540 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 14:28:55,541 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 14:28:55,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:28:55,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 14:28:55,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695368701] [2020-04-17 14:28:55,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:28:55,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:28:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:28:55,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=209, Unknown=5, NotChecked=0, Total=306 [2020-04-17 14:28:55,543 INFO L87 Difference]: Start difference. First operand 184 states and 468 transitions. Second operand 18 states. [2020-04-17 14:28:57,844 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 28 [2020-04-17 14:28:59,986 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 14:29:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:14,689 INFO L93 Difference]: Finished difference Result 291 states and 680 transitions. [2020-04-17 14:29:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:29:14,689 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 14:29:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:14,690 INFO L225 Difference]: With dead ends: 291 [2020-04-17 14:29:14,690 INFO L226 Difference]: Without dead ends: 287 [2020-04-17 14:29:14,691 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=238, Invalid=458, Unknown=6, NotChecked=0, Total=702 [2020-04-17 14:29:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-04-17 14:29:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 189. [2020-04-17 14:29:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-04-17 14:29:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 481 transitions. [2020-04-17 14:29:14,695 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 481 transitions. Word has length 14 [2020-04-17 14:29:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:14,695 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 481 transitions. [2020-04-17 14:29:14,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:29:14,695 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 481 transitions. [2020-04-17 14:29:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:14,695 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:14,695 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:14,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:14,896 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-04-17 14:29:14,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:14,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505423480] [2020-04-17 14:29:14,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:14,989 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 14:29:14,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505423480] [2020-04-17 14:29:14,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581515377] [2020-04-17 14:29:14,989 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 14:29:15,032 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:29:15,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:15,033 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:15,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:15,166 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 14:29:15,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:15,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:15,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523125080] [2020-04-17 14:29:15,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:15,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:15,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:15,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:15,167 INFO L87 Difference]: Start difference. First operand 189 states and 481 transitions. Second operand 17 states. [2020-04-17 14:29:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:15,430 INFO L93 Difference]: Finished difference Result 276 states and 647 transitions. [2020-04-17 14:29:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:29:15,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:15,431 INFO L225 Difference]: With dead ends: 276 [2020-04-17 14:29:15,432 INFO L226 Difference]: Without dead ends: 266 [2020-04-17 14:29:15,432 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 14:29:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-04-17 14:29:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 189. [2020-04-17 14:29:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-04-17 14:29:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 477 transitions. [2020-04-17 14:29:15,436 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 477 transitions. Word has length 14 [2020-04-17 14:29:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:15,436 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 477 transitions. [2020-04-17 14:29:15,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 477 transitions. [2020-04-17 14:29:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:15,437 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:15,437 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:15,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:15,640 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-04-17 14:29:15,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:15,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503903010] [2020-04-17 14:29:15,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:15,800 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 14:29:15,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503903010] [2020-04-17 14:29:15,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135630269] [2020-04-17 14:29:15,801 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 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 14:29:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:15,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:15,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:16,085 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 14:29:16,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:16,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:16,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113787944] [2020-04-17 14:29:16,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:16,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:16,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:16,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:16,087 INFO L87 Difference]: Start difference. First operand 189 states and 477 transitions. Second operand 17 states. [2020-04-17 14:29:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:16,452 INFO L93 Difference]: Finished difference Result 252 states and 602 transitions. [2020-04-17 14:29:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:29:16,453 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:16,454 INFO L225 Difference]: With dead ends: 252 [2020-04-17 14:29:16,454 INFO L226 Difference]: Without dead ends: 250 [2020-04-17 14:29:16,454 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:29:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-04-17 14:29:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 186. [2020-04-17 14:29:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-04-17 14:29:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 470 transitions. [2020-04-17 14:29:16,458 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 470 transitions. Word has length 14 [2020-04-17 14:29:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:16,458 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 470 transitions. [2020-04-17 14:29:16,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:16,459 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 470 transitions. [2020-04-17 14:29:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:16,459 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:16,459 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:16,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:16,660 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-04-17 14:29:16,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:16,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195632749] [2020-04-17 14:29:16,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:16,795 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 14:29:16,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195632749] [2020-04-17 14:29:16,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162963890] [2020-04-17 14:29:16,795 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 14:29:16,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:29:16,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:16,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:16,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:29:17,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:17,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:17,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966781621] [2020-04-17 14:29:17,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:17,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:17,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:17,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:17,026 INFO L87 Difference]: Start difference. First operand 186 states and 470 transitions. Second operand 17 states. [2020-04-17 14:29:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:17,167 INFO L93 Difference]: Finished difference Result 241 states and 575 transitions. [2020-04-17 14:29:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:29:17,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:17,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:17,168 INFO L225 Difference]: With dead ends: 241 [2020-04-17 14:29:17,168 INFO L226 Difference]: Without dead ends: 236 [2020-04-17 14:29:17,169 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:29:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-04-17 14:29:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 188. [2020-04-17 14:29:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 14:29:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 472 transitions. [2020-04-17 14:29:17,173 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 472 transitions. Word has length 14 [2020-04-17 14:29:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:17,173 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 472 transitions. [2020-04-17 14:29:17,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 472 transitions. [2020-04-17 14:29:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:17,173 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:17,173 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:17,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:17,374 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:17,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:17,375 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-04-17 14:29:17,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:17,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52589035] [2020-04-17 14:29:17,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:17,505 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 14:29:17,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52589035] [2020-04-17 14:29:17,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103844505] [2020-04-17 14:29:17,506 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 14:29:17,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:29:17,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:17,547 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:17,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:17,681 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 14:29:17,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:17,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:17,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399415707] [2020-04-17 14:29:17,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:17,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:17,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:17,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:17,682 INFO L87 Difference]: Start difference. First operand 188 states and 472 transitions. Second operand 17 states. [2020-04-17 14:29:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:17,758 INFO L93 Difference]: Finished difference Result 237 states and 570 transitions. [2020-04-17 14:29:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:29:17,758 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:17,759 INFO L225 Difference]: With dead ends: 237 [2020-04-17 14:29:17,759 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 14:29:17,760 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 14:29:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 14:29:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 196. [2020-04-17 14:29:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 14:29:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 496 transitions. [2020-04-17 14:29:17,764 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 496 transitions. Word has length 14 [2020-04-17 14:29:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:17,764 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 496 transitions. [2020-04-17 14:29:17,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 496 transitions. [2020-04-17 14:29:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:17,764 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:17,765 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:17,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:17,965 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-04-17 14:29:17,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:17,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504438073] [2020-04-17 14:29:17,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:18,077 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 14:29:18,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504438073] [2020-04-17 14:29:18,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170051965] [2020-04-17 14:29:18,078 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 14:29:18,128 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:29:18,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:18,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:18,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:18,256 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 14:29:18,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:18,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:18,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488076778] [2020-04-17 14:29:18,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:18,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:18,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:18,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:18,257 INFO L87 Difference]: Start difference. First operand 196 states and 496 transitions. Second operand 17 states. [2020-04-17 14:29:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:18,461 INFO L93 Difference]: Finished difference Result 249 states and 594 transitions. [2020-04-17 14:29:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:29:18,462 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:18,463 INFO L225 Difference]: With dead ends: 249 [2020-04-17 14:29:18,463 INFO L226 Difference]: Without dead ends: 247 [2020-04-17 14:29:18,463 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 14:29:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-04-17 14:29:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 194. [2020-04-17 14:29:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 14:29:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 14:29:18,468 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 14:29:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:18,468 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 14:29:18,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 14:29:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:18,469 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:18,469 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:18,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:18,673 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:18,673 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-04-17 14:29:18,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:18,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123215899] [2020-04-17 14:29:18,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:18,803 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 14:29:18,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123215899] [2020-04-17 14:29:18,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429059287] [2020-04-17 14:29:18,804 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 14:29:18,858 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:29:18,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:18,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:18,860 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:19,043 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 14:29:19,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:19,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:19,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745687378] [2020-04-17 14:29:19,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:19,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:19,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:19,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:19,045 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 17 states. [2020-04-17 14:29:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:19,346 INFO L93 Difference]: Finished difference Result 265 states and 628 transitions. [2020-04-17 14:29:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:29:19,346 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:19,347 INFO L225 Difference]: With dead ends: 265 [2020-04-17 14:29:19,347 INFO L226 Difference]: Without dead ends: 263 [2020-04-17 14:29:19,348 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:29:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-17 14:29:19,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 192. [2020-04-17 14:29:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 14:29:19,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 484 transitions. [2020-04-17 14:29:19,352 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 484 transitions. Word has length 14 [2020-04-17 14:29:19,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:19,352 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 484 transitions. [2020-04-17 14:29:19,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:19,352 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 484 transitions. [2020-04-17 14:29:19,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:19,353 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:19,353 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:19,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:19,553 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:19,554 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-04-17 14:29:19,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:19,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501829507] [2020-04-17 14:29:19,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:19,646 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 14:29:19,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501829507] [2020-04-17 14:29:19,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053474144] [2020-04-17 14:29:19,647 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:29:19,691 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:29:19,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:19,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:19,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:20,848 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 14:29:20,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:20,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:20,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393661972] [2020-04-17 14:29:20,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:20,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:20,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:20,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:20,849 INFO L87 Difference]: Start difference. First operand 192 states and 484 transitions. Second operand 17 states. [2020-04-17 14:29:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:21,242 INFO L93 Difference]: Finished difference Result 263 states and 622 transitions. [2020-04-17 14:29:21,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:29:21,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:21,244 INFO L225 Difference]: With dead ends: 263 [2020-04-17 14:29:21,244 INFO L226 Difference]: Without dead ends: 261 [2020-04-17 14:29:21,244 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:29:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-04-17 14:29:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 194. [2020-04-17 14:29:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 14:29:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 14:29:21,249 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 14:29:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:21,250 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 14:29:21,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 14:29:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:21,250 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:21,250 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:21,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:21,454 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:21,454 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-04-17 14:29:21,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:21,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439062577] [2020-04-17 14:29:21,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:21,552 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 14:29:21,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439062577] [2020-04-17 14:29:21,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929844643] [2020-04-17 14:29:21,552 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:29:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:21,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:21,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:27,804 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 14:29:27,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:27,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:27,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649245288] [2020-04-17 14:29:27,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:27,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:27,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:27,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:27,805 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 17 states. [2020-04-17 14:29:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:28,151 INFO L93 Difference]: Finished difference Result 282 states and 661 transitions. [2020-04-17 14:29:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:29:28,151 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:28,152 INFO L225 Difference]: With dead ends: 282 [2020-04-17 14:29:28,152 INFO L226 Difference]: Without dead ends: 280 [2020-04-17 14:29:28,152 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:29:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-04-17 14:29:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2020-04-17 14:29:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 14:29:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 14:29:28,157 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 14:29:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:28,157 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 14:29:28,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 14:29:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:28,157 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:28,157 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:28,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:28,358 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:28,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:28,359 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-04-17 14:29:28,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:28,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019917358] [2020-04-17 14:29:28,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:28,473 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 14:29:28,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019917358] [2020-04-17 14:29:28,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135068901] [2020-04-17 14:29:28,474 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 14:29:28,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:29:28,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:28,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:28,520 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:28,677 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 14:29:28,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:28,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:28,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311734514] [2020-04-17 14:29:28,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:28,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:28,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:28,678 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 17 states. [2020-04-17 14:29:29,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:29,035 INFO L93 Difference]: Finished difference Result 270 states and 637 transitions. [2020-04-17 14:29:29,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:29:29,035 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:29,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:29,036 INFO L225 Difference]: With dead ends: 270 [2020-04-17 14:29:29,036 INFO L226 Difference]: Without dead ends: 268 [2020-04-17 14:29:29,037 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 14:29:29,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-17 14:29:29,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 190. [2020-04-17 14:29:29,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-04-17 14:29:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 478 transitions. [2020-04-17 14:29:29,040 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 478 transitions. Word has length 14 [2020-04-17 14:29:29,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:29,040 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 478 transitions. [2020-04-17 14:29:29,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:29,040 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 478 transitions. [2020-04-17 14:29:29,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:29,041 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:29,041 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:29,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:29,242 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-04-17 14:29:29,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:29,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450761497] [2020-04-17 14:29:29,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:29,323 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 14:29:29,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450761497] [2020-04-17 14:29:29,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010817244] [2020-04-17 14:29:29,323 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:29:29,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:29:29,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:29,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:29,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:29,500 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 14:29:29,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:29,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:29,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634700830] [2020-04-17 14:29:29,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:29,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:29,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:29,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:29,501 INFO L87 Difference]: Start difference. First operand 190 states and 478 transitions. Second operand 17 states. [2020-04-17 14:29:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:29,845 INFO L93 Difference]: Finished difference Result 261 states and 618 transitions. [2020-04-17 14:29:29,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:29:29,845 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:29,846 INFO L225 Difference]: With dead ends: 261 [2020-04-17 14:29:29,846 INFO L226 Difference]: Without dead ends: 259 [2020-04-17 14:29:29,846 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 14:29:29,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-04-17 14:29:29,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 193. [2020-04-17 14:29:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-04-17 14:29:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 487 transitions. [2020-04-17 14:29:29,850 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 487 transitions. Word has length 14 [2020-04-17 14:29:29,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:29,851 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 487 transitions. [2020-04-17 14:29:29,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 487 transitions. [2020-04-17 14:29:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:29,851 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:29,851 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:30,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:30,055 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:30,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:30,055 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-04-17 14:29:30,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:30,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549633225] [2020-04-17 14:29:30,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:30,137 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 14:29:30,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549633225] [2020-04-17 14:29:30,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407319026] [2020-04-17 14:29:30,138 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 14:29:30,181 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:29:30,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:30,182 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:30,182 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:30,681 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 14:29:30,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:30,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:30,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710186387] [2020-04-17 14:29:30,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:30,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:30,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:30,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:30,683 INFO L87 Difference]: Start difference. First operand 193 states and 487 transitions. Second operand 17 states. [2020-04-17 14:29:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:31,056 INFO L93 Difference]: Finished difference Result 286 states and 669 transitions. [2020-04-17 14:29:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:29:31,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:31,057 INFO L225 Difference]: With dead ends: 286 [2020-04-17 14:29:31,057 INFO L226 Difference]: Without dead ends: 284 [2020-04-17 14:29:31,057 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 14:29:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-04-17 14:29:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 194. [2020-04-17 14:29:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 14:29:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 14:29:31,060 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 14:29:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:31,060 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 14:29:31,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 14:29:31,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:31,061 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:31,061 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:31,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:31,262 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:31,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:31,263 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-04-17 14:29:31,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:31,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467703774] [2020-04-17 14:29:31,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:31,361 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 14:29:31,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467703774] [2020-04-17 14:29:31,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465618694] [2020-04-17 14:29:31,362 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 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 14:29:31,425 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:29:31,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:31,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:31,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:31,609 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 14:29:31,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:31,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:31,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150737725] [2020-04-17 14:29:31,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:31,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:31,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:31,611 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 17 states. [2020-04-17 14:29:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:31,978 INFO L93 Difference]: Finished difference Result 288 states and 676 transitions. [2020-04-17 14:29:31,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:29:31,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:31,979 INFO L225 Difference]: With dead ends: 288 [2020-04-17 14:29:31,979 INFO L226 Difference]: Without dead ends: 286 [2020-04-17 14:29:31,980 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:29:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-04-17 14:29:31,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 193. [2020-04-17 14:29:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-04-17 14:29:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 487 transitions. [2020-04-17 14:29:31,984 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 487 transitions. Word has length 14 [2020-04-17 14:29:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:31,984 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 487 transitions. [2020-04-17 14:29:31,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 487 transitions. [2020-04-17 14:29:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:31,985 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:31,985 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:32,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:32,188 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:32,188 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-04-17 14:29:32,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:32,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204114423] [2020-04-17 14:29:32,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:32,273 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 14:29:32,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204114423] [2020-04-17 14:29:32,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577149156] [2020-04-17 14:29:32,274 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 14:29:32,317 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:29:32,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:32,318 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:32,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:32,439 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 14:29:32,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:32,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:32,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297539932] [2020-04-17 14:29:32,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:32,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:32,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:32,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:32,441 INFO L87 Difference]: Start difference. First operand 193 states and 487 transitions. Second operand 17 states. [2020-04-17 14:29:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:32,700 INFO L93 Difference]: Finished difference Result 254 states and 600 transitions. [2020-04-17 14:29:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:29:32,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:32,701 INFO L225 Difference]: With dead ends: 254 [2020-04-17 14:29:32,701 INFO L226 Difference]: Without dead ends: 244 [2020-04-17 14:29:32,702 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:29:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-04-17 14:29:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 188. [2020-04-17 14:29:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 14:29:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 470 transitions. [2020-04-17 14:29:32,705 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 470 transitions. Word has length 14 [2020-04-17 14:29:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:32,706 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 470 transitions. [2020-04-17 14:29:32,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 470 transitions. [2020-04-17 14:29:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:32,706 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:32,706 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:32,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:32,909 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:32,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-04-17 14:29:32,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:32,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138067372] [2020-04-17 14:29:32,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:33,033 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 14:29:33,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138067372] [2020-04-17 14:29:33,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124242347] [2020-04-17 14:29:33,034 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 14:29:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:33,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:33,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:33,195 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 14:29:33,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:33,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:33,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334308319] [2020-04-17 14:29:33,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:33,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:33,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:33,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:33,196 INFO L87 Difference]: Start difference. First operand 188 states and 470 transitions. Second operand 17 states. [2020-04-17 14:29:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:33,296 INFO L93 Difference]: Finished difference Result 229 states and 552 transitions. [2020-04-17 14:29:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:29:33,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:33,297 INFO L225 Difference]: With dead ends: 229 [2020-04-17 14:29:33,297 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 14:29:33,297 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 14:29:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 14:29:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 194. [2020-04-17 14:29:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 14:29:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 488 transitions. [2020-04-17 14:29:33,301 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 488 transitions. Word has length 14 [2020-04-17 14:29:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:33,302 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 488 transitions. [2020-04-17 14:29:33,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:33,302 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 488 transitions. [2020-04-17 14:29:33,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:33,302 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:33,302 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:33,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:33,503 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:33,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:33,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-04-17 14:29:33,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:33,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741045013] [2020-04-17 14:29:33,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:33,604 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 14:29:33,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741045013] [2020-04-17 14:29:33,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447322139] [2020-04-17 14:29:33,605 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 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 14:29:33,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:29:33,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:33,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:33,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:33,779 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 14:29:33,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:33,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:33,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054823349] [2020-04-17 14:29:33,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:33,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:33,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:33,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:33,781 INFO L87 Difference]: Start difference. First operand 194 states and 488 transitions. Second operand 17 states. [2020-04-17 14:29:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:34,020 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-04-17 14:29:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:29:34,021 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:34,021 INFO L225 Difference]: With dead ends: 255 [2020-04-17 14:29:34,022 INFO L226 Difference]: Without dead ends: 253 [2020-04-17 14:29:34,022 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 14:29:34,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-04-17 14:29:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 192. [2020-04-17 14:29:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 14:29:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 14:29:34,026 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 14:29:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:34,026 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 14:29:34,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:34,027 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 14:29:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:34,027 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:34,027 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:34,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:34,229 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:34,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-04-17 14:29:34,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:34,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694516616] [2020-04-17 14:29:34,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:34,317 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 14:29:34,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694516616] [2020-04-17 14:29:34,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720612049] [2020-04-17 14:29:34,318 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 14:29:34,360 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:29:34,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:34,361 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:34,361 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:29:39,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:39,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:39,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219197406] [2020-04-17 14:29:39,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:39,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:39,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:39,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:39,014 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 14:29:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:39,311 INFO L93 Difference]: Finished difference Result 267 states and 630 transitions. [2020-04-17 14:29:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:29:39,311 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:39,312 INFO L225 Difference]: With dead ends: 267 [2020-04-17 14:29:39,312 INFO L226 Difference]: Without dead ends: 265 [2020-04-17 14:29:39,312 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:29:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-04-17 14:29:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 190. [2020-04-17 14:29:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-04-17 14:29:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 476 transitions. [2020-04-17 14:29:39,316 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 476 transitions. Word has length 14 [2020-04-17 14:29:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:39,317 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 476 transitions. [2020-04-17 14:29:39,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:39,317 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 476 transitions. [2020-04-17 14:29:39,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:39,317 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:39,317 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:39,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:39,521 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:39,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-04-17 14:29:39,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:39,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817550510] [2020-04-17 14:29:39,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:39,613 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 14:29:39,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817550510] [2020-04-17 14:29:39,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504816381] [2020-04-17 14:29:39,614 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 14:29:39,662 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:29:39,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:39,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:39,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:48,088 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 14:29:48,089 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 14:29:48,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:48,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 14:29:48,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879602635] [2020-04-17 14:29:48,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:29:48,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:48,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:29:48,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2020-04-17 14:29:48,090 INFO L87 Difference]: Start difference. First operand 190 states and 476 transitions. Second operand 18 states. [2020-04-17 14:29:50,363 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 14:29:56,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:56,284 INFO L93 Difference]: Finished difference Result 273 states and 641 transitions. [2020-04-17 14:29:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:29:56,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 14:29:56,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:56,285 INFO L225 Difference]: With dead ends: 273 [2020-04-17 14:29:56,285 INFO L226 Difference]: Without dead ends: 271 [2020-04-17 14:29:56,286 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=234, Invalid=519, Unknown=3, NotChecked=0, Total=756 [2020-04-17 14:29:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-04-17 14:29:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 192. [2020-04-17 14:29:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 14:29:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 14:29:56,290 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 14:29:56,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:56,290 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 14:29:56,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:29:56,290 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 14:29:56,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:56,290 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:56,291 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:56,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:56,493 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:56,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:56,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-04-17 14:29:56,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:56,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686901052] [2020-04-17 14:29:56,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:56,568 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 14:29:56,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686901052] [2020-04-17 14:29:56,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044173806] [2020-04-17 14:29:56,569 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 14:29:56,609 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:29:56,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:56,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:56,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:56,766 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 14:29:56,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:56,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:56,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126825631] [2020-04-17 14:29:56,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:56,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:56,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:56,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:56,767 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 14:29:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:57,144 INFO L93 Difference]: Finished difference Result 280 states and 655 transitions. [2020-04-17 14:29:57,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:29:57,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:57,145 INFO L225 Difference]: With dead ends: 280 [2020-04-17 14:29:57,146 INFO L226 Difference]: Without dead ends: 278 [2020-04-17 14:29:57,146 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 14:29:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-04-17 14:29:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 192. [2020-04-17 14:29:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 14:29:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 14:29:57,150 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 14:29:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:57,150 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 14:29:57,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 14:29:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:57,151 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:57,151 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:57,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:57,352 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:57,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:57,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-04-17 14:29:57,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:57,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745364036] [2020-04-17 14:29:57,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:57,442 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 14:29:57,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745364036] [2020-04-17 14:29:57,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177674001] [2020-04-17 14:29:57,443 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 14:29:57,486 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:29:57,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:57,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:57,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:57,643 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 14:29:57,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:57,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:57,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135509762] [2020-04-17 14:29:57,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:57,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:57,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:57,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:57,645 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 14:29:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:58,038 INFO L93 Difference]: Finished difference Result 267 states and 631 transitions. [2020-04-17 14:29:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:29:58,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:58,040 INFO L225 Difference]: With dead ends: 267 [2020-04-17 14:29:58,040 INFO L226 Difference]: Without dead ends: 265 [2020-04-17 14:29:58,040 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 14:29:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-04-17 14:29:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 188. [2020-04-17 14:29:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 14:29:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 470 transitions. [2020-04-17 14:29:58,044 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 470 transitions. Word has length 14 [2020-04-17 14:29:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:58,044 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 470 transitions. [2020-04-17 14:29:58,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 470 transitions. [2020-04-17 14:29:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:58,045 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:58,045 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:58,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:58,246 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:58,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:58,246 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-04-17 14:29:58,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:58,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321547101] [2020-04-17 14:29:58,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:58,369 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 14:29:58,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321547101] [2020-04-17 14:29:58,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628642165] [2020-04-17 14:29:58,369 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 14:29:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:58,415 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:58,416 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:58,537 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 14:29:58,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:58,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:58,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176737868] [2020-04-17 14:29:58,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:58,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:58,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:58,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:58,538 INFO L87 Difference]: Start difference. First operand 188 states and 470 transitions. Second operand 17 states. [2020-04-17 14:29:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:58,669 INFO L93 Difference]: Finished difference Result 221 states and 536 transitions. [2020-04-17 14:29:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:29:58,670 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:58,671 INFO L225 Difference]: With dead ends: 221 [2020-04-17 14:29:58,671 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 14:29:58,671 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 14:29:58,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 14:29:58,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 192. [2020-04-17 14:29:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 14:29:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 14:29:58,675 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 14:29:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:58,675 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 14:29:58,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 14:29:58,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:58,675 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:58,675 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:58,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:58,876 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:58,877 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-04-17 14:29:58,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:58,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103836054] [2020-04-17 14:29:58,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:29:58,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103836054] [2020-04-17 14:29:58,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622611724] [2020-04-17 14:29:58,976 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 14:29:59,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:29:59,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:59,020 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:29:59,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:59,146 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 14:29:59,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:59,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:29:59,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321081096] [2020-04-17 14:29:59,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:29:59,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:59,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:29:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:29:59,147 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 14:29:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:29:59,404 INFO L93 Difference]: Finished difference Result 247 states and 588 transitions. [2020-04-17 14:29:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:29:59,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:29:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:29:59,405 INFO L225 Difference]: With dead ends: 247 [2020-04-17 14:29:59,406 INFO L226 Difference]: Without dead ends: 245 [2020-04-17 14:29:59,406 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 14:29:59,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-04-17 14:29:59,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 190. [2020-04-17 14:29:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-04-17 14:29:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 476 transitions. [2020-04-17 14:29:59,410 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 476 transitions. Word has length 14 [2020-04-17 14:29:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:29:59,410 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 476 transitions. [2020-04-17 14:29:59,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:29:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 476 transitions. [2020-04-17 14:29:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:29:59,411 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:29:59,411 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:29:59,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:29:59,612 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:29:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:29:59,612 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-04-17 14:29:59,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:29:59,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771433828] [2020-04-17 14:29:59,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:29:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:29:59,705 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 14:29:59,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771433828] [2020-04-17 14:29:59,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734400421] [2020-04-17 14:29:59,706 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 14:29:59,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:29:59,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:29:59,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:29:59,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:29:59,831 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 14:29:59,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:29:59,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-04-17 14:29:59,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666171416] [2020-04-17 14:29:59,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:29:59,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:29:59,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:29:59,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:29:59,833 INFO L87 Difference]: Start difference. First operand 190 states and 476 transitions. Second operand 14 states. [2020-04-17 14:30:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:00,108 INFO L93 Difference]: Finished difference Result 264 states and 622 transitions. [2020-04-17 14:30:00,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:30:00,108 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-04-17 14:30:00,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:00,109 INFO L225 Difference]: With dead ends: 264 [2020-04-17 14:30:00,109 INFO L226 Difference]: Without dead ends: 260 [2020-04-17 14:30:00,109 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:30:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-04-17 14:30:00,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 188. [2020-04-17 14:30:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 14:30:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 470 transitions. [2020-04-17 14:30:00,113 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 470 transitions. Word has length 14 [2020-04-17 14:30:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:00,114 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 470 transitions. [2020-04-17 14:30:00,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:30:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 470 transitions. [2020-04-17 14:30:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:00,114 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:00,114 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:00,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:00,315 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:00,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:00,315 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-04-17 14:30:00,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:00,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229106364] [2020-04-17 14:30:00,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:00,415 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 14:30:00,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229106364] [2020-04-17 14:30:00,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697764574] [2020-04-17 14:30:00,416 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 14:30:00,459 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:30:00,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:00,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:00,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:00,578 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 14:30:00,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:00,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:00,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208910520] [2020-04-17 14:30:00,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:00,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:00,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:00,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:00,580 INFO L87 Difference]: Start difference. First operand 188 states and 470 transitions. Second operand 17 states. [2020-04-17 14:30:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:00,748 INFO L93 Difference]: Finished difference Result 213 states and 520 transitions. [2020-04-17 14:30:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:30:00,749 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:00,750 INFO L225 Difference]: With dead ends: 213 [2020-04-17 14:30:00,750 INFO L226 Difference]: Without dead ends: 211 [2020-04-17 14:30:00,750 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 14:30:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-04-17 14:30:00,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 190. [2020-04-17 14:30:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-04-17 14:30:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 476 transitions. [2020-04-17 14:30:00,754 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 476 transitions. Word has length 14 [2020-04-17 14:30:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:00,754 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 476 transitions. [2020-04-17 14:30:00,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 476 transitions. [2020-04-17 14:30:00,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:00,755 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:00,755 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:00,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:00,956 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:00,956 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-04-17 14:30:00,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:00,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930137020] [2020-04-17 14:30:00,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:01,041 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 14:30:01,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930137020] [2020-04-17 14:30:01,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112095591] [2020-04-17 14:30:01,042 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 14:30:01,087 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:30:01,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:01,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:01,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:01,232 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 14:30:01,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:01,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:01,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130667757] [2020-04-17 14:30:01,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:01,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:01,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:01,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:01,233 INFO L87 Difference]: Start difference. First operand 190 states and 476 transitions. Second operand 17 states. [2020-04-17 14:30:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:01,515 INFO L93 Difference]: Finished difference Result 239 states and 572 transitions. [2020-04-17 14:30:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:30:01,515 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:01,516 INFO L225 Difference]: With dead ends: 239 [2020-04-17 14:30:01,516 INFO L226 Difference]: Without dead ends: 237 [2020-04-17 14:30:01,516 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 14:30:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-04-17 14:30:01,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 188. [2020-04-17 14:30:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 14:30:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 470 transitions. [2020-04-17 14:30:01,521 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 470 transitions. Word has length 14 [2020-04-17 14:30:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:01,521 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 470 transitions. [2020-04-17 14:30:01,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 470 transitions. [2020-04-17 14:30:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:01,521 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:01,521 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:01,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:01,722 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:01,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:01,723 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-04-17 14:30:01,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:01,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746882452] [2020-04-17 14:30:01,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:01,807 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 14:30:01,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746882452] [2020-04-17 14:30:01,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274831229] [2020-04-17 14:30:01,808 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 14:30:01,853 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:30:01,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:01,854 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:30:01,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:01,906 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 14:30:01,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:01,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 14:30:01,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198286452] [2020-04-17 14:30:01,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:30:01,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:01,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:30:01,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:30:01,907 INFO L87 Difference]: Start difference. First operand 188 states and 470 transitions. Second operand 11 states. [2020-04-17 14:30:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:02,044 INFO L93 Difference]: Finished difference Result 217 states and 532 transitions. [2020-04-17 14:30:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:30:02,044 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 14:30:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:02,045 INFO L225 Difference]: With dead ends: 217 [2020-04-17 14:30:02,045 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 14:30:02,045 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:30:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 14:30:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2020-04-17 14:30:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 14:30:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 490 transitions. [2020-04-17 14:30:02,049 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 490 transitions. Word has length 14 [2020-04-17 14:30:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:02,049 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 490 transitions. [2020-04-17 14:30:02,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:30:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 490 transitions. [2020-04-17 14:30:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:02,050 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:02,050 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:02,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:02,250 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-04-17 14:30:02,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:02,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723844567] [2020-04-17 14:30:02,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:02,338 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 14:30:02,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723844567] [2020-04-17 14:30:02,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644121429] [2020-04-17 14:30:02,339 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:30:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:02,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:02,381 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:02,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:02,506 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 14:30:02,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:02,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:02,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146969594] [2020-04-17 14:30:02,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:02,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:02,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:02,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:02,507 INFO L87 Difference]: Start difference. First operand 196 states and 490 transitions. Second operand 17 states. [2020-04-17 14:30:02,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:02,882 INFO L93 Difference]: Finished difference Result 241 states and 592 transitions. [2020-04-17 14:30:02,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:30:02,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:02,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:02,883 INFO L225 Difference]: With dead ends: 241 [2020-04-17 14:30:02,883 INFO L226 Difference]: Without dead ends: 236 [2020-04-17 14:30:02,884 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 14:30:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-04-17 14:30:02,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 196. [2020-04-17 14:30:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 14:30:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 490 transitions. [2020-04-17 14:30:02,887 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 490 transitions. Word has length 14 [2020-04-17 14:30:02,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:02,888 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 490 transitions. [2020-04-17 14:30:02,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 490 transitions. [2020-04-17 14:30:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:02,888 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:02,888 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:03,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:03,089 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:03,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:03,089 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-04-17 14:30:03,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:03,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535685414] [2020-04-17 14:30:03,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:03,169 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 14:30:03,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535685414] [2020-04-17 14:30:03,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899366970] [2020-04-17 14:30:03,170 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 14:30:03,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:30:03,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:03,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:03,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:03,350 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 14:30:03,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:03,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:03,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847254995] [2020-04-17 14:30:03,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:03,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:03,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:03,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:03,351 INFO L87 Difference]: Start difference. First operand 196 states and 490 transitions. Second operand 17 states. [2020-04-17 14:30:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:03,663 INFO L93 Difference]: Finished difference Result 245 states and 596 transitions. [2020-04-17 14:30:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:30:03,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:03,664 INFO L225 Difference]: With dead ends: 245 [2020-04-17 14:30:03,664 INFO L226 Difference]: Without dead ends: 243 [2020-04-17 14:30:03,665 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:30:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-04-17 14:30:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 198. [2020-04-17 14:30:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 14:30:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 497 transitions. [2020-04-17 14:30:03,668 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 497 transitions. Word has length 14 [2020-04-17 14:30:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:03,669 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 497 transitions. [2020-04-17 14:30:03,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:03,669 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 497 transitions. [2020-04-17 14:30:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:03,669 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:03,669 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:03,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:03,870 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:03,870 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-04-17 14:30:03,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:03,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962709819] [2020-04-17 14:30:03,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:03,944 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 14:30:03,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962709819] [2020-04-17 14:30:03,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184578491] [2020-04-17 14:30:03,944 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 14:30:03,988 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:30:03,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:03,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:03,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:04,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:04,243 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 14:30:04,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:04,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:04,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524248727] [2020-04-17 14:30:04,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:04,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:04,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:04,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:04,245 INFO L87 Difference]: Start difference. First operand 198 states and 497 transitions. Second operand 17 states. [2020-04-17 14:30:04,962 WARN L192 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-04-17 14:30:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:05,341 INFO L93 Difference]: Finished difference Result 267 states and 653 transitions. [2020-04-17 14:30:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:30:05,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:05,342 INFO L225 Difference]: With dead ends: 267 [2020-04-17 14:30:05,342 INFO L226 Difference]: Without dead ends: 262 [2020-04-17 14:30:05,343 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:30:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-04-17 14:30:05,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 198. [2020-04-17 14:30:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 14:30:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 497 transitions. [2020-04-17 14:30:05,348 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 497 transitions. Word has length 14 [2020-04-17 14:30:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:05,348 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 497 transitions. [2020-04-17 14:30:05,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 497 transitions. [2020-04-17 14:30:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:05,349 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:05,349 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:05,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:05,553 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:05,553 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-04-17 14:30:05,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:05,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341140856] [2020-04-17 14:30:05,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:05,628 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 14:30:05,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341140856] [2020-04-17 14:30:05,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434268107] [2020-04-17 14:30:05,629 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 14:30:05,666 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:30:05,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:05,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:05,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:05,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:05,792 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 14:30:05,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:05,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:05,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615814914] [2020-04-17 14:30:05,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:05,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:05,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:05,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:05,794 INFO L87 Difference]: Start difference. First operand 198 states and 497 transitions. Second operand 17 states. [2020-04-17 14:30:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:06,200 INFO L93 Difference]: Finished difference Result 266 states and 648 transitions. [2020-04-17 14:30:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:30:06,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:06,201 INFO L225 Difference]: With dead ends: 266 [2020-04-17 14:30:06,202 INFO L226 Difference]: Without dead ends: 261 [2020-04-17 14:30:06,202 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 14:30:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-04-17 14:30:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 196. [2020-04-17 14:30:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 14:30:06,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 490 transitions. [2020-04-17 14:30:06,206 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 490 transitions. Word has length 14 [2020-04-17 14:30:06,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:06,206 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 490 transitions. [2020-04-17 14:30:06,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:06,207 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 490 transitions. [2020-04-17 14:30:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:06,209 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:06,209 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:06,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:06,413 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:06,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:06,414 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-04-17 14:30:06,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:06,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203754999] [2020-04-17 14:30:06,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:06,490 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 14:30:06,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203754999] [2020-04-17 14:30:06,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165296066] [2020-04-17 14:30:06,490 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 14:30:06,546 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:30:06,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:06,547 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:06,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:07,397 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 14:30:07,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:07,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:07,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896284400] [2020-04-17 14:30:07,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:07,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:07,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:07,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:07,399 INFO L87 Difference]: Start difference. First operand 196 states and 490 transitions. Second operand 17 states. [2020-04-17 14:30:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:07,734 INFO L93 Difference]: Finished difference Result 272 states and 650 transitions. [2020-04-17 14:30:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:30:07,734 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:07,735 INFO L225 Difference]: With dead ends: 272 [2020-04-17 14:30:07,735 INFO L226 Difference]: Without dead ends: 270 [2020-04-17 14:30:07,735 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:30:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-04-17 14:30:07,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 198. [2020-04-17 14:30:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 14:30:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 497 transitions. [2020-04-17 14:30:07,738 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 497 transitions. Word has length 14 [2020-04-17 14:30:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:07,739 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 497 transitions. [2020-04-17 14:30:07,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 497 transitions. [2020-04-17 14:30:07,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:07,746 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:07,746 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:07,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:07,947 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-04-17 14:30:07,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:07,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944869792] [2020-04-17 14:30:07,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:08,022 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 14:30:08,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944869792] [2020-04-17 14:30:08,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037497741] [2020-04-17 14:30:08,023 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 14:30:08,083 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:30:08,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:08,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:08,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:11,315 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 14:30:11,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:11,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:11,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151500199] [2020-04-17 14:30:11,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:11,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:11,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:11,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=193, Unknown=1, NotChecked=0, Total=272 [2020-04-17 14:30:11,316 INFO L87 Difference]: Start difference. First operand 198 states and 497 transitions. Second operand 17 states. [2020-04-17 14:30:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:12,947 INFO L93 Difference]: Finished difference Result 282 states and 681 transitions. [2020-04-17 14:30:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:30:12,948 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:12,948 INFO L225 Difference]: With dead ends: 282 [2020-04-17 14:30:12,948 INFO L226 Difference]: Without dead ends: 280 [2020-04-17 14:30:12,948 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=272, Invalid=595, Unknown=3, NotChecked=0, Total=870 [2020-04-17 14:30:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-04-17 14:30:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 202. [2020-04-17 14:30:12,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-04-17 14:30:12,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 511 transitions. [2020-04-17 14:30:12,952 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 511 transitions. Word has length 14 [2020-04-17 14:30:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:12,952 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 511 transitions. [2020-04-17 14:30:12,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 511 transitions. [2020-04-17 14:30:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:12,953 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:12,953 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:13,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:13,153 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-04-17 14:30:13,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:13,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452134763] [2020-04-17 14:30:13,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:13,235 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 14:30:13,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452134763] [2020-04-17 14:30:13,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162451861] [2020-04-17 14:30:13,235 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 14:30:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:13,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:13,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:14,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:15,010 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 14:30:15,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:15,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:15,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898087947] [2020-04-17 14:30:15,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:15,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:15,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:15,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=180, Unknown=1, NotChecked=0, Total=272 [2020-04-17 14:30:15,011 INFO L87 Difference]: Start difference. First operand 202 states and 511 transitions. Second operand 17 states. [2020-04-17 14:30:15,538 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-04-17 14:30:16,124 WARN L192 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 14:30:16,640 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-17 14:30:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:16,799 INFO L93 Difference]: Finished difference Result 273 states and 669 transitions. [2020-04-17 14:30:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:30:16,799 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:16,799 INFO L225 Difference]: With dead ends: 273 [2020-04-17 14:30:16,800 INFO L226 Difference]: Without dead ends: 268 [2020-04-17 14:30:16,800 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=371, Invalid=750, Unknown=1, NotChecked=0, Total=1122 [2020-04-17 14:30:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-17 14:30:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 202. [2020-04-17 14:30:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-04-17 14:30:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 511 transitions. [2020-04-17 14:30:16,803 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 511 transitions. Word has length 14 [2020-04-17 14:30:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:16,804 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 511 transitions. [2020-04-17 14:30:16,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 511 transitions. [2020-04-17 14:30:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:16,804 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:16,804 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:17,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:17,005 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-04-17 14:30:17,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:17,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925537320] [2020-04-17 14:30:17,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:17,089 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 14:30:17,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925537320] [2020-04-17 14:30:17,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245124577] [2020-04-17 14:30:17,090 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 14:30:17,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:30:17,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:17,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:17,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:18,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:18,527 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 14:30:18,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:18,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 14:30:18,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328757146] [2020-04-17 14:30:18,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:30:18,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:30:18,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=214, Unknown=2, NotChecked=0, Total=306 [2020-04-17 14:30:18,528 INFO L87 Difference]: Start difference. First operand 202 states and 511 transitions. Second operand 18 states. [2020-04-17 14:30:22,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:22,789 INFO L93 Difference]: Finished difference Result 327 states and 793 transitions. [2020-04-17 14:30:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:30:22,790 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 14:30:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:22,790 INFO L225 Difference]: With dead ends: 327 [2020-04-17 14:30:22,790 INFO L226 Difference]: Without dead ends: 317 [2020-04-17 14:30:22,791 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=403, Invalid=925, Unknown=4, NotChecked=0, Total=1332 [2020-04-17 14:30:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-04-17 14:30:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 198. [2020-04-17 14:30:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 14:30:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 500 transitions. [2020-04-17 14:30:22,794 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 500 transitions. Word has length 14 [2020-04-17 14:30:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:22,794 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 500 transitions. [2020-04-17 14:30:22,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:30:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 500 transitions. [2020-04-17 14:30:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:22,795 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:22,795 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:22,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:22,996 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:22,996 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-04-17 14:30:22,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:22,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673454848] [2020-04-17 14:30:22,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:23,075 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 14:30:23,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673454848] [2020-04-17 14:30:23,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574406736] [2020-04-17 14:30:23,076 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 14:30:23,118 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:30:23,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:23,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:23,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:24,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:24,028 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 14:30:24,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:24,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:24,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763108871] [2020-04-17 14:30:24,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:24,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:24,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:24,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:24,030 INFO L87 Difference]: Start difference. First operand 198 states and 500 transitions. Second operand 17 states. [2020-04-17 14:30:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:24,582 INFO L93 Difference]: Finished difference Result 286 states and 702 transitions. [2020-04-17 14:30:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:30:24,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:24,583 INFO L225 Difference]: With dead ends: 286 [2020-04-17 14:30:24,583 INFO L226 Difference]: Without dead ends: 281 [2020-04-17 14:30:24,583 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:30:24,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-04-17 14:30:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2020-04-17 14:30:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 14:30:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 490 transitions. [2020-04-17 14:30:24,587 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 490 transitions. Word has length 14 [2020-04-17 14:30:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:24,587 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 490 transitions. [2020-04-17 14:30:24,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 490 transitions. [2020-04-17 14:30:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:24,588 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:24,588 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:24,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:24,790 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:24,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:24,791 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-04-17 14:30:24,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:24,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805251886] [2020-04-17 14:30:24,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:24,868 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 14:30:24,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805251886] [2020-04-17 14:30:24,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793538608] [2020-04-17 14:30:24,869 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 14:30:24,913 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:30:24,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:24,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:24,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:31,240 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 14:30:31,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:31,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:31,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296944995] [2020-04-17 14:30:31,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:31,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:31,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:31,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:31,241 INFO L87 Difference]: Start difference. First operand 196 states and 490 transitions. Second operand 17 states. [2020-04-17 14:30:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:31,639 INFO L93 Difference]: Finished difference Result 275 states and 652 transitions. [2020-04-17 14:30:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:30:31,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:31,641 INFO L225 Difference]: With dead ends: 275 [2020-04-17 14:30:31,641 INFO L226 Difference]: Without dead ends: 273 [2020-04-17 14:30:31,641 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:30:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-04-17 14:30:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 199. [2020-04-17 14:30:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-04-17 14:30:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 501 transitions. [2020-04-17 14:30:31,645 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 501 transitions. Word has length 14 [2020-04-17 14:30:31,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:31,646 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 501 transitions. [2020-04-17 14:30:31,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:31,646 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 501 transitions. [2020-04-17 14:30:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:31,646 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:31,646 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:31,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:31,847 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:31,847 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-04-17 14:30:31,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:31,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975775714] [2020-04-17 14:30:31,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:31,926 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 14:30:31,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975775714] [2020-04-17 14:30:31,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419258017] [2020-04-17 14:30:31,927 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 14:30:31,971 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:30:31,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:31,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:31,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:32,201 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 14:30:32,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:32,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:32,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900167608] [2020-04-17 14:30:32,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:32,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:32,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:32,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:32,203 INFO L87 Difference]: Start difference. First operand 199 states and 501 transitions. Second operand 17 states. [2020-04-17 14:30:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:32,722 INFO L93 Difference]: Finished difference Result 289 states and 680 transitions. [2020-04-17 14:30:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:30:32,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:32,724 INFO L225 Difference]: With dead ends: 289 [2020-04-17 14:30:32,724 INFO L226 Difference]: Without dead ends: 287 [2020-04-17 14:30:32,724 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:30:32,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-04-17 14:30:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 200. [2020-04-17 14:30:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-04-17 14:30:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 503 transitions. [2020-04-17 14:30:32,728 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 503 transitions. Word has length 14 [2020-04-17 14:30:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:32,728 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 503 transitions. [2020-04-17 14:30:32,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 503 transitions. [2020-04-17 14:30:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:32,729 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:32,729 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:32,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:32,930 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:32,930 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-04-17 14:30:32,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:32,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876243755] [2020-04-17 14:30:32,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:33,015 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 14:30:33,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876243755] [2020-04-17 14:30:33,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565595767] [2020-04-17 14:30:33,016 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 14:30:33,058 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:30:33,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:33,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:33,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:33,228 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 14:30:33,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:33,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:33,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386262422] [2020-04-17 14:30:33,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:33,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:33,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:33,229 INFO L87 Difference]: Start difference. First operand 200 states and 503 transitions. Second operand 17 states. [2020-04-17 14:30:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:33,588 INFO L93 Difference]: Finished difference Result 279 states and 660 transitions. [2020-04-17 14:30:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:30:33,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:33,589 INFO L225 Difference]: With dead ends: 279 [2020-04-17 14:30:33,589 INFO L226 Difference]: Without dead ends: 277 [2020-04-17 14:30:33,590 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 14:30:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-04-17 14:30:33,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-04-17 14:30:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-04-17 14:30:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 497 transitions. [2020-04-17 14:30:33,594 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 497 transitions. Word has length 14 [2020-04-17 14:30:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:33,594 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 497 transitions. [2020-04-17 14:30:33,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 497 transitions. [2020-04-17 14:30:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:33,594 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:33,594 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:33,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:33,795 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-04-17 14:30:33,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:33,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408236847] [2020-04-17 14:30:33,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:33,903 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 14:30:33,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408236847] [2020-04-17 14:30:33,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013042294] [2020-04-17 14:30:33,904 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 14:30:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:33,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:33,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:34,288 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 14:30:34,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:34,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:34,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350376293] [2020-04-17 14:30:34,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:34,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:34,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:34,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:34,289 INFO L87 Difference]: Start difference. First operand 198 states and 497 transitions. Second operand 17 states. [2020-04-17 14:30:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:34,903 INFO L93 Difference]: Finished difference Result 280 states and 665 transitions. [2020-04-17 14:30:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:30:34,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:34,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:34,904 INFO L225 Difference]: With dead ends: 280 [2020-04-17 14:30:34,904 INFO L226 Difference]: Without dead ends: 278 [2020-04-17 14:30:34,905 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:30:34,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-04-17 14:30:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 200. [2020-04-17 14:30:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-04-17 14:30:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 505 transitions. [2020-04-17 14:30:34,909 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 505 transitions. Word has length 14 [2020-04-17 14:30:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:34,909 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 505 transitions. [2020-04-17 14:30:34,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 505 transitions. [2020-04-17 14:30:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:34,909 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:34,909 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:35,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:35,113 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-04-17 14:30:35,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:35,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693102346] [2020-04-17 14:30:35,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:35,196 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 14:30:35,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693102346] [2020-04-17 14:30:35,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162139042] [2020-04-17 14:30:35,197 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 14:30:35,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:30:35,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:35,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:35,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:35,431 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 14:30:35,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:35,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:35,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603812343] [2020-04-17 14:30:35,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:35,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:35,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:35,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:35,432 INFO L87 Difference]: Start difference. First operand 200 states and 505 transitions. Second operand 17 states. [2020-04-17 14:30:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:36,014 INFO L93 Difference]: Finished difference Result 309 states and 730 transitions. [2020-04-17 14:30:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:30:36,015 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:36,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:36,016 INFO L225 Difference]: With dead ends: 309 [2020-04-17 14:30:36,016 INFO L226 Difference]: Without dead ends: 307 [2020-04-17 14:30:36,016 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 14:30:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-04-17 14:30:36,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 203. [2020-04-17 14:30:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-04-17 14:30:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 514 transitions. [2020-04-17 14:30:36,021 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 514 transitions. Word has length 14 [2020-04-17 14:30:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:36,021 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 514 transitions. [2020-04-17 14:30:36,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 514 transitions. [2020-04-17 14:30:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:36,022 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:36,022 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:36,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:36,225 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:36,225 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-04-17 14:30:36,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:36,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781218060] [2020-04-17 14:30:36,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:36,308 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 14:30:36,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781218060] [2020-04-17 14:30:36,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459245269] [2020-04-17 14:30:36,309 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:30:36,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:30:36,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:36,353 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:36,353 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:37,076 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 14:30:37,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:37,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 14:30:37,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761028432] [2020-04-17 14:30:37,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:30:37,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:37,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:30:37,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=223, Unknown=1, NotChecked=0, Total=306 [2020-04-17 14:30:37,077 INFO L87 Difference]: Start difference. First operand 203 states and 514 transitions. Second operand 18 states. [2020-04-17 14:30:38,301 WARN L192 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-04-17 14:30:41,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:41,047 INFO L93 Difference]: Finished difference Result 283 states and 682 transitions. [2020-04-17 14:30:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:30:41,048 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 14:30:41,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:41,048 INFO L225 Difference]: With dead ends: 283 [2020-04-17 14:30:41,048 INFO L226 Difference]: Without dead ends: 281 [2020-04-17 14:30:41,049 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=325, Invalid=730, Unknown=1, NotChecked=0, Total=1056 [2020-04-17 14:30:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-04-17 14:30:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 205. [2020-04-17 14:30:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-04-17 14:30:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 521 transitions. [2020-04-17 14:30:41,053 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 521 transitions. Word has length 14 [2020-04-17 14:30:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:41,053 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 521 transitions. [2020-04-17 14:30:41,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:30:41,053 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 521 transitions. [2020-04-17 14:30:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:41,054 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:41,054 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:41,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:41,254 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:41,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:41,255 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-04-17 14:30:41,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:41,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545635937] [2020-04-17 14:30:41,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:41,331 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 14:30:41,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545635937] [2020-04-17 14:30:41,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044027822] [2020-04-17 14:30:41,332 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 14:30:41,376 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:30:41,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:41,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:41,377 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:41,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:41,566 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 14:30:41,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:41,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:41,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507802351] [2020-04-17 14:30:41,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:41,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:41,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:41,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:41,567 INFO L87 Difference]: Start difference. First operand 205 states and 521 transitions. Second operand 17 states. [2020-04-17 14:30:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:42,380 INFO L93 Difference]: Finished difference Result 276 states and 679 transitions. [2020-04-17 14:30:42,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:30:42,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:42,381 INFO L225 Difference]: With dead ends: 276 [2020-04-17 14:30:42,381 INFO L226 Difference]: Without dead ends: 271 [2020-04-17 14:30:42,381 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 14:30:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-04-17 14:30:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 205. [2020-04-17 14:30:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-04-17 14:30:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 521 transitions. [2020-04-17 14:30:42,385 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 521 transitions. Word has length 14 [2020-04-17 14:30:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:42,385 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 521 transitions. [2020-04-17 14:30:42,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 521 transitions. [2020-04-17 14:30:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:42,385 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:42,385 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:42,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:42,586 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:42,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:42,586 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-04-17 14:30:42,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:42,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679912939] [2020-04-17 14:30:42,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:42,673 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 14:30:42,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679912939] [2020-04-17 14:30:42,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700082630] [2020-04-17 14:30:42,674 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 14:30:42,721 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:30:42,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:42,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:42,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:42,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:42,903 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 14:30:42,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:42,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 14:30:42,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567163926] [2020-04-17 14:30:42,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:30:42,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:42,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:30:42,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:30:42,904 INFO L87 Difference]: Start difference. First operand 205 states and 521 transitions. Second operand 17 states. [2020-04-17 14:30:45,474 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-17 14:30:45,945 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-17 14:30:46,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:46,073 INFO L93 Difference]: Finished difference Result 309 states and 759 transitions. [2020-04-17 14:30:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:30:46,074 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 14:30:46,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:46,075 INFO L225 Difference]: With dead ends: 309 [2020-04-17 14:30:46,075 INFO L226 Difference]: Without dead ends: 304 [2020-04-17 14:30:46,075 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:30:46,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-04-17 14:30:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 203. [2020-04-17 14:30:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-04-17 14:30:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 514 transitions. [2020-04-17 14:30:46,079 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 514 transitions. Word has length 14 [2020-04-17 14:30:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:46,079 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 514 transitions. [2020-04-17 14:30:46,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:30:46,080 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 514 transitions. [2020-04-17 14:30:46,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:30:46,080 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:46,080 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:46,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:46,281 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:46,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:46,281 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-04-17 14:30:46,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:46,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271853953] [2020-04-17 14:30:46,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:46,355 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 14:30:46,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271853953] [2020-04-17 14:30:46,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424829211] [2020-04-17 14:30:46,356 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 14:30:46,403 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:30:46,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:46,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:30:46,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-04-17 14:30:50,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:50,832 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 14:30:50,837 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 14:30:50,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 02:30:50 BasicIcfg [2020-04-17 14:30:50,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 14:30:50,839 INFO L168 Benchmark]: Toolchain (without parser) took 284969.13 ms. Allocated memory was 142.1 MB in the beginning and 188.7 MB in the end (delta: 46.7 MB). Free memory was 100.3 MB in the beginning and 75.0 MB in the end (delta: 25.3 MB). Peak memory consumption was 72.0 MB. Max. memory is 7.1 GB. [2020-04-17 14:30:50,839 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 142.1 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-04-17 14:30:50,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 760.59 ms. Allocated memory was 142.1 MB in the beginning and 200.3 MB in the end (delta: 58.2 MB). Free memory was 98.4 MB in the beginning and 157.4 MB in the end (delta: -59.0 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-04-17 14:30:50,839 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.25 ms. Allocated memory is still 200.3 MB. Free memory was 157.4 MB in the beginning and 155.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-04-17 14:30:50,840 INFO L168 Benchmark]: Boogie Preprocessor took 37.20 ms. Allocated memory is still 200.3 MB. Free memory was 155.2 MB in the beginning and 153.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 14:30:50,840 INFO L168 Benchmark]: RCFGBuilder took 486.42 ms. Allocated memory is still 200.3 MB. Free memory was 153.8 MB in the beginning and 133.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-04-17 14:30:50,840 INFO L168 Benchmark]: TraceAbstraction took 283614.05 ms. Allocated memory was 200.3 MB in the beginning and 188.7 MB in the end (delta: -11.5 MB). Free memory was 132.8 MB in the beginning and 75.0 MB in the end (delta: 57.7 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2020-04-17 14:30:50,841 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 142.1 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 760.59 ms. Allocated memory was 142.1 MB in the beginning and 200.3 MB in the end (delta: 58.2 MB). Free memory was 98.4 MB in the beginning and 157.4 MB in the end (delta: -59.0 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 50.25 ms. Allocated memory is still 200.3 MB. Free memory was 157.4 MB in the beginning and 155.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.20 ms. Allocated memory is still 200.3 MB. Free memory was 155.2 MB in the beginning and 153.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 486.42 ms. Allocated memory is still 200.3 MB. Free memory was 153.8 MB in the beginning and 133.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 283614.05 ms. Allocated memory was 200.3 MB in the beginning and 188.7 MB in the end (delta: -11.5 MB). Free memory was 132.8 MB in the beginning and 75.0 MB in the end (delta: 57.7 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 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 analyzing trace of length 15 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 283.4s, OverallIterations: 196, TraceHistogramMax: 6, AutomataDifference: 113.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 2590 SDtfs, 17958 SDslu, 17610 SDs, 0 SdLazy, 12642 SolverSat, 4640 SolverUnsat, 31 SolverUnknown, 0 SolverNotchecked, 53.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5023 GetRequests, 929 SyntacticMatches, 181 SemanticMatches, 3913 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 20901 ImplicationChecksByTransitivity, 166.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=205occurred in iteration=193, 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, 195 MinimizatonAttempts, 9741 StatesRemovedByMinimization, 194 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 3.0s SatisfiabilityAnalysisTime, 113.9s InterpolantComputationTime, 4822 NumberOfCodeBlocks, 4822 NumberOfCodeBlocksAsserted, 593 NumberOfCheckSat, 4440 ConstructedInterpolants, 71 QuantifiedInterpolants, 470918 SizeOfPredicates, 190 NumberOfNonLiveVariables, 16344 ConjunctsInSsa, 1852 ConjunctsInUnsatCore, 382 InterpolantComputations, 9 PerfectInterpolantSequences, 35/1846 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