/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/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-26 20:50:57,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-26 20:50:57,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-26 20:50:57,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-26 20:50:57,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-26 20:50:57,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-26 20:50:57,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-26 20:50:57,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-26 20:50:57,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-26 20:50:57,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-26 20:50:57,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-26 20:50:57,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-26 20:50:57,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-26 20:50:57,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-26 20:50:57,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-26 20:50:57,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-26 20:50:57,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-26 20:50:57,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-26 20:50:57,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-26 20:50:57,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-26 20:50:57,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-26 20:50:57,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-26 20:50:57,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-26 20:50:57,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-26 20:50:57,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-26 20:50:57,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-26 20:50:57,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-26 20:50:57,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-26 20:50:57,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-26 20:50:57,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-26 20:50:57,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-26 20:50:57,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-26 20:50:57,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-26 20:50:57,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-26 20:50:57,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-26 20:50:57,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-26 20:50:57,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-26 20:50:57,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-26 20:50:57,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-26 20:50:57,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-26 20:50:57,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-26 20:50:57,810 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 [2019-12-26 20:50:57,837 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-26 20:50:57,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-26 20:50:57,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-26 20:50:57,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-26 20:50:57,839 INFO L138 SettingsManager]: * Use SBE=true [2019-12-26 20:50:57,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-26 20:50:57,839 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-26 20:50:57,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-26 20:50:57,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-26 20:50:57,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-26 20:50:57,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-26 20:50:57,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-26 20:50:57,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-26 20:50:57,840 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-26 20:50:57,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-26 20:50:57,841 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-26 20:50:57,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-26 20:50:57,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-26 20:50:57,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-26 20:50:57,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-26 20:50:57,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-26 20:50:57,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-26 20:50:57,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-26 20:50:57,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-26 20:50:57,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-26 20:50:57,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-26 20:50:57,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-26 20:50:57,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-26 20:50:57,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-26 20:50:57,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-26 20:50:58,123 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-26 20:50:58,136 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-26 20:50:58,139 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-26 20:50:58,141 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-26 20:50:58,141 INFO L275 PluginConnector]: CDTParser initialized [2019-12-26 20:50:58,142 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2019-12-26 20:50:58,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45671e312/f314030603df4558b7b89a19d7e4a8c8/FLAGaab01dd30 [2019-12-26 20:50:58,811 INFO L306 CDTParser]: Found 1 translation units. [2019-12-26 20:50:58,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2019-12-26 20:50:58,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45671e312/f314030603df4558b7b89a19d7e4a8c8/FLAGaab01dd30 [2019-12-26 20:50:59,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45671e312/f314030603df4558b7b89a19d7e4a8c8 [2019-12-26 20:50:59,133 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-26 20:50:59,135 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-26 20:50:59,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-26 20:50:59,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-26 20:50:59,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-26 20:50:59,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:50:59" (1/1) ... [2019-12-26 20:50:59,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aad24cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59, skipping insertion in model container [2019-12-26 20:50:59,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.12 08:50:59" (1/1) ... [2019-12-26 20:50:59,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-26 20:50:59,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-26 20:50:59,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:50:59,710 INFO L203 MainTranslator]: Completed pre-run [2019-12-26 20:50:59,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-26 20:50:59,845 INFO L208 MainTranslator]: Completed translation [2019-12-26 20:50:59,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59 WrapperNode [2019-12-26 20:50:59,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-26 20:50:59,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-26 20:50:59,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-26 20:50:59,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-26 20:50:59,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59" (1/1) ... [2019-12-26 20:50:59,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59" (1/1) ... [2019-12-26 20:50:59,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-26 20:50:59,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-26 20:50:59,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-26 20:50:59,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-26 20:50:59,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59" (1/1) ... [2019-12-26 20:50:59,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59" (1/1) ... [2019-12-26 20:50:59,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59" (1/1) ... [2019-12-26 20:50:59,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59" (1/1) ... [2019-12-26 20:50:59,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59" (1/1) ... [2019-12-26 20:50:59,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59" (1/1) ... [2019-12-26 20:50:59,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59" (1/1) ... [2019-12-26 20:50:59,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-26 20:50:59,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-26 20:50:59,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-26 20:50:59,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-26 20:50:59,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59" (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 [2019-12-26 20:50:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-26 20:50:59,977 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-26 20:50:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-26 20:50:59,977 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-26 20:50:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-26 20:50:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-26 20:50:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-26 20:50:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-26 20:50:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-26 20:50:59,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-26 20:50:59,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-26 20:50:59,980 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-26 20:51:00,334 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-26 20:51:00,335 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-26 20:51:00,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:51:00 BoogieIcfgContainer [2019-12-26 20:51:00,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-26 20:51:00,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-26 20:51:00,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-26 20:51:00,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-26 20:51:00,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.12 08:50:59" (1/3) ... [2019-12-26 20:51:00,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7166b5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:51:00, skipping insertion in model container [2019-12-26 20:51:00,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.12 08:50:59" (2/3) ... [2019-12-26 20:51:00,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7166b5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.12 08:51:00, skipping insertion in model container [2019-12-26 20:51:00,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.12 08:51:00" (3/3) ... [2019-12-26 20:51:00,345 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2019-12-26 20:51:00,356 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-26 20:51:00,356 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-26 20:51:00,364 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-26 20:51:00,365 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-26 20:51:00,392 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,393 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,393 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,393 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,394 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,394 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,395 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,395 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,395 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,395 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,396 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,396 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,396 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,397 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,397 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,397 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,398 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,398 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,398 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,399 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,399 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,399 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,399 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,400 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,400 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,400 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,401 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,401 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,405 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,406 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,406 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,406 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,406 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,407 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,412 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,413 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,413 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,413 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,414 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,414 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-26 20:51:00,429 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-26 20:51:00,446 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-26 20:51:00,447 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-26 20:51:00,447 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-26 20:51:00,447 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-26 20:51:00,447 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-26 20:51:00,448 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-26 20:51:00,448 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-26 20:51:00,448 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-26 20:51:00,461 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-26 20:51:00,463 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-26 20:51:00,534 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-26 20:51:00,535 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:51:00,542 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 0/43 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-26 20:51:00,544 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-26 20:51:00,560 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-26 20:51:00,561 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-26 20:51:00,562 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 0/43 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-26 20:51:00,564 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-26 20:51:00,565 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-26 20:51:01,739 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-26 20:51:01,873 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-26 20:51:01,874 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-26 20:51:01,878 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-26 20:51:01,888 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-26 20:51:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-26 20:51:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-26 20:51:01,897 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:01,898 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-26 20:51:01,898 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:01,905 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-26 20:51:01,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:01,913 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738356953] [2019-12-26 20:51:01,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:02,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738356953] [2019-12-26 20:51:02,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:51:02,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-26 20:51:02,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834050324] [2019-12-26 20:51:02,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-26 20:51:02,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:02,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-26 20:51:02,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-26 20:51:02,143 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-26 20:51:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:02,199 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-26 20:51:02,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-26 20:51:02,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-26 20:51:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:02,232 INFO L225 Difference]: With dead ends: 48 [2019-12-26 20:51:02,232 INFO L226 Difference]: Without dead ends: 28 [2019-12-26 20:51:02,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-26 20:51:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-26 20:51:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-26 20:51:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-26 20:51:02,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-26 20:51:02,271 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-26 20:51:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:02,272 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-26 20:51:02,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-26 20:51:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-26 20:51:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-26 20:51:02,273 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:02,273 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:02,273 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-26 20:51:02,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:02,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654479390] [2019-12-26 20:51:02,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:02,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654479390] [2019-12-26 20:51:02,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:51:02,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-26 20:51:02,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013650114] [2019-12-26 20:51:02,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-26 20:51:02,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-26 20:51:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:51:02,389 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-26 20:51:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:02,406 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-26 20:51:02,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-26 20:51:02,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-26 20:51:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:02,407 INFO L225 Difference]: With dead ends: 34 [2019-12-26 20:51:02,407 INFO L226 Difference]: Without dead ends: 30 [2019-12-26 20:51:02,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-26 20:51:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-26 20:51:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-26 20:51:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-26 20:51:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-26 20:51:02,414 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 7 [2019-12-26 20:51:02,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:02,415 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-26 20:51:02,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-26 20:51:02,415 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-26 20:51:02,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:51:02,416 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:02,416 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:02,416 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:02,417 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-26 20:51:02,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:02,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054244758] [2019-12-26 20:51:02,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:02,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054244758] [2019-12-26 20:51:02,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:51:02,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:51:02,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869618337] [2019-12-26 20:51:02,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:51:02,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:51:02,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:51:02,504 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 5 states. [2019-12-26 20:51:02,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:02,546 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-26 20:51:02,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-26 20:51:02,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:51:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:02,550 INFO L225 Difference]: With dead ends: 34 [2019-12-26 20:51:02,551 INFO L226 Difference]: Without dead ends: 28 [2019-12-26 20:51:02,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-26 20:51:02,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-26 20:51:02,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-26 20:51:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-26 20:51:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-26 20:51:02,557 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-26 20:51:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:02,559 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-26 20:51:02,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:51:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-26 20:51:02,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-26 20:51:02,560 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:02,560 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:02,560 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:02,560 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 2 times [2019-12-26 20:51:02,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:02,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512282153] [2019-12-26 20:51:02,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:02,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512282153] [2019-12-26 20:51:02,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-26 20:51:02,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-26 20:51:02,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857114386] [2019-12-26 20:51:02,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-26 20:51:02,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:02,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-26 20:51:02,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-26 20:51:02,665 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-26 20:51:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:02,718 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-26 20:51:02,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:51:02,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-26 20:51:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:02,719 INFO L225 Difference]: With dead ends: 32 [2019-12-26 20:51:02,719 INFO L226 Difference]: Without dead ends: 28 [2019-12-26 20:51:02,721 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-26 20:51:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-26 20:51:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-26 20:51:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-26 20:51:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-26 20:51:02,729 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 9 [2019-12-26 20:51:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:02,729 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-26 20:51:02,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-26 20:51:02,730 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-26 20:51:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:51:02,730 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:02,731 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:02,731 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:02,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:02,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 3 times [2019-12-26 20:51:02,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:02,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974960325] [2019-12-26 20:51:02,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:02,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974960325] [2019-12-26 20:51:02,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683785056] [2019-12-26 20:51:02,826 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 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 [2019-12-26 20:51:02,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-26 20:51:02,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:02,891 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:51:02,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:02,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:02,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-26 20:51:02,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379583192] [2019-12-26 20:51:02,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-26 20:51:02,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:02,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-26 20:51:02,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-26 20:51:02,931 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 7 states. [2019-12-26 20:51:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:02,996 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-26 20:51:02,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-26 20:51:02,996 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-26 20:51:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:02,997 INFO L225 Difference]: With dead ends: 32 [2019-12-26 20:51:02,997 INFO L226 Difference]: Without dead ends: 29 [2019-12-26 20:51:02,997 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-12-26 20:51:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-26 20:51:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-26 20:51:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-26 20:51:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-26 20:51:03,002 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 10 [2019-12-26 20:51:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:03,002 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-26 20:51:03,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-26 20:51:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-26 20:51:03,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-26 20:51:03,003 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:03,003 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:03,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:03,209 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:03,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 4 times [2019-12-26 20:51:03,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:03,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737353376] [2019-12-26 20:51:03,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:03,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737353376] [2019-12-26 20:51:03,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014298404] [2019-12-26 20:51:03,285 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:03,357 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:03,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:03,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-26 20:51:03,361 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:03,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:03,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-26 20:51:03,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619584666] [2019-12-26 20:51:03,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-26 20:51:03,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:03,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-26 20:51:03,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-26 20:51:03,384 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 7 states. [2019-12-26 20:51:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:03,463 INFO L93 Difference]: Finished difference Result 33 states and 68 transitions. [2019-12-26 20:51:03,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-26 20:51:03,464 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-26 20:51:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:03,465 INFO L225 Difference]: With dead ends: 33 [2019-12-26 20:51:03,465 INFO L226 Difference]: Without dead ends: 30 [2019-12-26 20:51:03,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:51:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-26 20:51:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-26 20:51:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-26 20:51:03,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-26 20:51:03,470 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-26 20:51:03,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:03,471 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-26 20:51:03,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-26 20:51:03,471 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-26 20:51:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:51:03,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:03,472 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:03,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:03,673 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 5 times [2019-12-26 20:51:03,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:03,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536165203] [2019-12-26 20:51:03,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:03,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536165203] [2019-12-26 20:51:03,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944695125] [2019-12-26 20:51:03,733 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 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 [2019-12-26 20:51:03,781 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:03,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:03,783 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:51:03,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:03,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:03,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-26 20:51:03,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996563749] [2019-12-26 20:51:03,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:51:03,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:03,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:51:03,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:51:03,804 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 8 states. [2019-12-26 20:51:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:03,902 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-26 20:51:03,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:51:03,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-26 20:51:03,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:03,903 INFO L225 Difference]: With dead ends: 34 [2019-12-26 20:51:03,904 INFO L226 Difference]: Without dead ends: 31 [2019-12-26 20:51:03,904 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:51:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-26 20:51:03,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-26 20:51:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-26 20:51:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-26 20:51:03,908 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 11 [2019-12-26 20:51:03,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:03,909 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-26 20:51:03,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:51:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-26 20:51:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-26 20:51:03,910 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:03,910 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:04,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:04,114 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 6 times [2019-12-26 20:51:04,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:04,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972443782] [2019-12-26 20:51:04,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:04,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972443782] [2019-12-26 20:51:04,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037348561] [2019-12-26 20:51:04,217 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:04,270 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-26 20:51:04,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:04,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-26 20:51:04,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:04,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:04,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-26 20:51:04,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790808720] [2019-12-26 20:51:04,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-26 20:51:04,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:04,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-26 20:51:04,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-26 20:51:04,289 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 8 states. [2019-12-26 20:51:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:04,456 INFO L93 Difference]: Finished difference Result 35 states and 72 transitions. [2019-12-26 20:51:04,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:51:04,457 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-26 20:51:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:04,458 INFO L225 Difference]: With dead ends: 35 [2019-12-26 20:51:04,458 INFO L226 Difference]: Without dead ends: 32 [2019-12-26 20:51:04,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:51:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-26 20:51:04,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-26 20:51:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-26 20:51:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-26 20:51:04,463 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 11 [2019-12-26 20:51:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:04,463 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-26 20:51:04,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-26 20:51:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-26 20:51:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:51:04,464 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:04,464 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:04,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:04,671 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:04,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 7 times [2019-12-26 20:51:04,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:04,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735888275] [2019-12-26 20:51:04,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:04,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735888275] [2019-12-26 20:51:04,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199080506] [2019-12-26 20:51:04,739 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:04,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:51:04,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:04,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:04,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-26 20:51:04,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540047816] [2019-12-26 20:51:04,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-26 20:51:04,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-26 20:51:04,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-26 20:51:04,830 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 9 states. [2019-12-26 20:51:04,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:04,939 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-26 20:51:04,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-26 20:51:04,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-26 20:51:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:04,940 INFO L225 Difference]: With dead ends: 36 [2019-12-26 20:51:04,940 INFO L226 Difference]: Without dead ends: 33 [2019-12-26 20:51:04,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:51:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-26 20:51:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-12-26 20:51:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-26 20:51:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-26 20:51:04,948 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 12 [2019-12-26 20:51:04,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:04,950 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-26 20:51:04,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-26 20:51:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-26 20:51:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-26 20:51:04,951 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:04,951 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:05,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:05,155 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:05,156 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 8 times [2019-12-26 20:51:05,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:05,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235127811] [2019-12-26 20:51:05,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:05,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235127811] [2019-12-26 20:51:05,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064797308] [2019-12-26 20:51:05,214 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:05,260 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:05,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:05,261 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-26 20:51:05,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:05,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:05,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-26 20:51:05,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351277023] [2019-12-26 20:51:05,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-26 20:51:05,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:05,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-26 20:51:05,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-26 20:51:05,302 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 9 states. [2019-12-26 20:51:05,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:05,410 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-26 20:51:05,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-26 20:51:05,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-26 20:51:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:05,411 INFO L225 Difference]: With dead ends: 37 [2019-12-26 20:51:05,411 INFO L226 Difference]: Without dead ends: 34 [2019-12-26 20:51:05,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:51:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-26 20:51:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-26 20:51:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-26 20:51:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-26 20:51:05,422 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2019-12-26 20:51:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:05,422 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-26 20:51:05,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-26 20:51:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-26 20:51:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:51:05,423 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:05,423 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:05,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:05,624 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:05,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 9 times [2019-12-26 20:51:05,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:05,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935644925] [2019-12-26 20:51:05,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:05,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935644925] [2019-12-26 20:51:05,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216099390] [2019-12-26 20:51:05,704 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:05,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-26 20:51:05,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:05,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:51:05,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:05,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:05,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-26 20:51:05,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279848850] [2019-12-26 20:51:05,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:51:05,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:05,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:51:05,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:51:05,805 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 10 states. [2019-12-26 20:51:05,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:05,955 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-26 20:51:05,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:51:05,957 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-26 20:51:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:05,958 INFO L225 Difference]: With dead ends: 38 [2019-12-26 20:51:05,958 INFO L226 Difference]: Without dead ends: 35 [2019-12-26 20:51:05,959 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:51:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-26 20:51:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-26 20:51:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-26 20:51:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-26 20:51:05,965 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 13 [2019-12-26 20:51:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:05,965 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-26 20:51:05,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:51:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-26 20:51:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-26 20:51:05,966 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:05,966 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:06,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:06,167 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:06,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 10 times [2019-12-26 20:51:06,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:06,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489258957] [2019-12-26 20:51:06,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:06,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489258957] [2019-12-26 20:51:06,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555441309] [2019-12-26 20:51:06,236 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:06,284 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:06,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:06,285 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-26 20:51:06,286 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:06,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:06,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-26 20:51:06,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151563060] [2019-12-26 20:51:06,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-26 20:51:06,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:06,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-26 20:51:06,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-26 20:51:06,313 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 10 states. [2019-12-26 20:51:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:06,439 INFO L93 Difference]: Finished difference Result 39 states and 80 transitions. [2019-12-26 20:51:06,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:51:06,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-26 20:51:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:06,441 INFO L225 Difference]: With dead ends: 39 [2019-12-26 20:51:06,441 INFO L226 Difference]: Without dead ends: 36 [2019-12-26 20:51:06,441 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:51:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-26 20:51:06,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-26 20:51:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-26 20:51:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-26 20:51:06,451 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 13 [2019-12-26 20:51:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:06,451 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-26 20:51:06,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-26 20:51:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-26 20:51:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:51:06,452 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:06,452 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:06,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:06,658 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:06,658 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 11 times [2019-12-26 20:51:06,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:06,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313181864] [2019-12-26 20:51:06,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:06,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313181864] [2019-12-26 20:51:06,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764384978] [2019-12-26 20:51:06,737 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:06,784 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-26 20:51:06,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:06,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:51:06,787 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:06,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:06,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-26 20:51:06,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198724667] [2019-12-26 20:51:06,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-26 20:51:06,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:06,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-26 20:51:06,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-26 20:51:06,805 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 11 states. [2019-12-26 20:51:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:06,951 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-26 20:51:06,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-26 20:51:06,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-26 20:51:06,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:06,952 INFO L225 Difference]: With dead ends: 40 [2019-12-26 20:51:06,953 INFO L226 Difference]: Without dead ends: 37 [2019-12-26 20:51:06,953 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:51:06,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-26 20:51:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-26 20:51:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-26 20:51:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-26 20:51:06,958 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-26 20:51:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:06,958 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-26 20:51:06,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-26 20:51:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-26 20:51:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-26 20:51:06,959 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:06,959 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:07,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:07,163 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:07,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 12 times [2019-12-26 20:51:07,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:07,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859819038] [2019-12-26 20:51:07,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:07,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859819038] [2019-12-26 20:51:07,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635541648] [2019-12-26 20:51:07,232 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:07,282 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-26 20:51:07,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:07,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-26 20:51:07,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:07,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:07,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-26 20:51:07,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544047483] [2019-12-26 20:51:07,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-26 20:51:07,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:07,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-26 20:51:07,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-26 20:51:07,307 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 11 states. [2019-12-26 20:51:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:07,496 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-26 20:51:07,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-26 20:51:07,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-26 20:51:07,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:07,502 INFO L225 Difference]: With dead ends: 41 [2019-12-26 20:51:07,502 INFO L226 Difference]: Without dead ends: 38 [2019-12-26 20:51:07,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:51:07,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-26 20:51:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-26 20:51:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-26 20:51:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-26 20:51:07,506 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 14 [2019-12-26 20:51:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:07,506 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-26 20:51:07,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-26 20:51:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-26 20:51:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-26 20:51:07,507 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:07,507 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:07,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:07,712 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:07,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 13 times [2019-12-26 20:51:07,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:07,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024413651] [2019-12-26 20:51:07,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:07,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024413651] [2019-12-26 20:51:07,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298733096] [2019-12-26 20:51:07,826 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:07,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:51:07,895 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:07,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:07,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-26 20:51:07,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252704668] [2019-12-26 20:51:07,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:51:07,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:51:07,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:51:07,922 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 12 states. [2019-12-26 20:51:08,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:08,123 INFO L93 Difference]: Finished difference Result 42 states and 86 transitions. [2019-12-26 20:51:08,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:51:08,124 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-26 20:51:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:08,125 INFO L225 Difference]: With dead ends: 42 [2019-12-26 20:51:08,125 INFO L226 Difference]: Without dead ends: 39 [2019-12-26 20:51:08,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:51:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-26 20:51:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-26 20:51:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-26 20:51:08,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-26 20:51:08,132 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 15 [2019-12-26 20:51:08,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:08,132 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-26 20:51:08,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:51:08,133 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-26 20:51:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-26 20:51:08,133 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:08,133 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:08,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:08,338 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:08,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 14 times [2019-12-26 20:51:08,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:08,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701504383] [2019-12-26 20:51:08,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:08,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701504383] [2019-12-26 20:51:08,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782966518] [2019-12-26 20:51:08,420 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:51:08,470 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:08,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:08,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-26 20:51:08,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:08,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:08,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-26 20:51:08,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155230307] [2019-12-26 20:51:08,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-26 20:51:08,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:08,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-26 20:51:08,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-26 20:51:08,489 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 12 states. [2019-12-26 20:51:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:08,663 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-26 20:51:08,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:51:08,664 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-26 20:51:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:08,664 INFO L225 Difference]: With dead ends: 43 [2019-12-26 20:51:08,664 INFO L226 Difference]: Without dead ends: 40 [2019-12-26 20:51:08,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:51:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-26 20:51:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-26 20:51:08,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-26 20:51:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-26 20:51:08,667 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 15 [2019-12-26 20:51:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:08,668 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-26 20:51:08,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-26 20:51:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-26 20:51:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-26 20:51:08,669 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:08,669 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:08,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:08,873 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:08,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:08,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 15 times [2019-12-26 20:51:08,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:08,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904096227] [2019-12-26 20:51:08,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:08,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904096227] [2019-12-26 20:51:08,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853121216] [2019-12-26 20:51:08,984 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:09,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-26 20:51:09,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:09,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:51:09,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:09,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:09,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-26 20:51:09,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635993177] [2019-12-26 20:51:09,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-26 20:51:09,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:09,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-26 20:51:09,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:51:09,094 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 13 states. [2019-12-26 20:51:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:09,278 INFO L93 Difference]: Finished difference Result 44 states and 90 transitions. [2019-12-26 20:51:09,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-26 20:51:09,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-26 20:51:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:09,280 INFO L225 Difference]: With dead ends: 44 [2019-12-26 20:51:09,280 INFO L226 Difference]: Without dead ends: 41 [2019-12-26 20:51:09,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:51:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-26 20:51:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2019-12-26 20:51:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-26 20:51:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-26 20:51:09,284 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-26 20:51:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:09,284 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-26 20:51:09,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-26 20:51:09,284 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-26 20:51:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-26 20:51:09,285 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:09,285 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:09,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:09,494 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 16 times [2019-12-26 20:51:09,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:09,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366991338] [2019-12-26 20:51:09,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:09,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366991338] [2019-12-26 20:51:09,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32169331] [2019-12-26 20:51:09,589 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:09,654 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:09,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:09,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-26 20:51:09,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:09,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:09,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-26 20:51:09,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356125894] [2019-12-26 20:51:09,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-26 20:51:09,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-26 20:51:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-26 20:51:09,686 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 13 states. [2019-12-26 20:51:09,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:09,880 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-26 20:51:09,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-26 20:51:09,880 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-26 20:51:09,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:09,881 INFO L225 Difference]: With dead ends: 45 [2019-12-26 20:51:09,881 INFO L226 Difference]: Without dead ends: 42 [2019-12-26 20:51:09,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:51:09,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-26 20:51:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-26 20:51:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-26 20:51:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-26 20:51:09,885 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 16 [2019-12-26 20:51:09,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:09,885 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-26 20:51:09,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-26 20:51:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-26 20:51:09,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-26 20:51:09,886 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:09,886 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:10,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:10,089 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:10,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 17 times [2019-12-26 20:51:10,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:10,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085364980] [2019-12-26 20:51:10,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:10,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085364980] [2019-12-26 20:51:10,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892251930] [2019-12-26 20:51:10,205 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:10,263 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-26 20:51:10,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:10,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-26 20:51:10,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:10,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:10,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-26 20:51:10,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889876113] [2019-12-26 20:51:10,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:51:10,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:10,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:51:10,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:51:10,289 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 14 states. [2019-12-26 20:51:10,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:10,541 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-26 20:51:10,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:51:10,542 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-26 20:51:10,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:10,543 INFO L225 Difference]: With dead ends: 46 [2019-12-26 20:51:10,543 INFO L226 Difference]: Without dead ends: 43 [2019-12-26 20:51:10,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:51:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-26 20:51:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-12-26 20:51:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-26 20:51:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-26 20:51:10,546 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 17 [2019-12-26 20:51:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:10,546 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-26 20:51:10,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:51:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-26 20:51:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-26 20:51:10,547 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:10,547 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:10,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:10,750 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:10,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:10,751 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 18 times [2019-12-26 20:51:10,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:10,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715785382] [2019-12-26 20:51:10,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:10,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715785382] [2019-12-26 20:51:10,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113262462] [2019-12-26 20:51:10,834 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:10,886 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-26 20:51:10,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:10,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-26 20:51:10,889 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:10,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:10,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-26 20:51:10,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492672143] [2019-12-26 20:51:10,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-26 20:51:10,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:10,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-26 20:51:10,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-26 20:51:10,944 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 14 states. [2019-12-26 20:51:11,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:11,176 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-26 20:51:11,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:51:11,176 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-26 20:51:11,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:11,177 INFO L225 Difference]: With dead ends: 47 [2019-12-26 20:51:11,178 INFO L226 Difference]: Without dead ends: 44 [2019-12-26 20:51:11,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:51:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-26 20:51:11,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-26 20:51:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-26 20:51:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-26 20:51:11,182 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-26 20:51:11,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:11,183 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-26 20:51:11,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-26 20:51:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-26 20:51:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-26 20:51:11,183 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:11,184 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:11,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:11,387 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 19 times [2019-12-26 20:51:11,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:11,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862368846] [2019-12-26 20:51:11,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:11,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862368846] [2019-12-26 20:51:11,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373521707] [2019-12-26 20:51:11,493 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:11,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-26 20:51:11,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:11,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:11,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-26 20:51:11,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605659001] [2019-12-26 20:51:11,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-26 20:51:11,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:11,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-26 20:51:11,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-26 20:51:11,569 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 15 states. [2019-12-26 20:51:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:11,786 INFO L93 Difference]: Finished difference Result 48 states and 98 transitions. [2019-12-26 20:51:11,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-26 20:51:11,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-26 20:51:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:11,787 INFO L225 Difference]: With dead ends: 48 [2019-12-26 20:51:11,788 INFO L226 Difference]: Without dead ends: 45 [2019-12-26 20:51:11,788 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:51:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-26 20:51:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2019-12-26 20:51:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-26 20:51:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-26 20:51:11,791 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 18 [2019-12-26 20:51:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:11,791 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-26 20:51:11,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-26 20:51:11,792 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-26 20:51:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-26 20:51:11,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:11,792 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:11,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:11,999 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:12,000 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 20 times [2019-12-26 20:51:12,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:12,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845327391] [2019-12-26 20:51:12,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:12,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845327391] [2019-12-26 20:51:12,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001495542] [2019-12-26 20:51:12,096 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:12,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:12,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:12,194 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-26 20:51:12,204 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:12,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:12,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-26 20:51:12,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143791544] [2019-12-26 20:51:12,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-26 20:51:12,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:12,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-26 20:51:12,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-26 20:51:12,235 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 15 states. [2019-12-26 20:51:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:12,521 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-12-26 20:51:12,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-26 20:51:12,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-26 20:51:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:12,523 INFO L225 Difference]: With dead ends: 49 [2019-12-26 20:51:12,523 INFO L226 Difference]: Without dead ends: 46 [2019-12-26 20:51:12,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:51:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-26 20:51:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-12-26 20:51:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-26 20:51:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 94 transitions. [2019-12-26 20:51:12,536 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 94 transitions. Word has length 18 [2019-12-26 20:51:12,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:12,536 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 94 transitions. [2019-12-26 20:51:12,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-26 20:51:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 94 transitions. [2019-12-26 20:51:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-26 20:51:12,537 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:12,538 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:12,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:12,746 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:12,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:12,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2080307442, now seen corresponding path program 21 times [2019-12-26 20:51:12,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:12,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610766876] [2019-12-26 20:51:12,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:12,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610766876] [2019-12-26 20:51:12,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479448278] [2019-12-26 20:51:12,877 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:12,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-26 20:51:12,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:12,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-26 20:51:12,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:12,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:12,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-26 20:51:12,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072471590] [2019-12-26 20:51:12,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:51:12,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:12,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:51:12,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:51:12,954 INFO L87 Difference]: Start difference. First operand 46 states and 94 transitions. Second operand 16 states. [2019-12-26 20:51:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:13,215 INFO L93 Difference]: Finished difference Result 50 states and 102 transitions. [2019-12-26 20:51:13,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:51:13,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-26 20:51:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:13,217 INFO L225 Difference]: With dead ends: 50 [2019-12-26 20:51:13,217 INFO L226 Difference]: Without dead ends: 47 [2019-12-26 20:51:13,218 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:51:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-26 20:51:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2019-12-26 20:51:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-26 20:51:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-12-26 20:51:13,221 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 19 [2019-12-26 20:51:13,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:13,222 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-12-26 20:51:13,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:51:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-12-26 20:51:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-26 20:51:13,222 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:13,222 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:13,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:13,426 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:13,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1609121454, now seen corresponding path program 22 times [2019-12-26 20:51:13,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:13,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805740355] [2019-12-26 20:51:13,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:13,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805740355] [2019-12-26 20:51:13,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229640374] [2019-12-26 20:51:13,540 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:13,594 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:13,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:13,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-26 20:51:13,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:13,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:13,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-26 20:51:13,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744156781] [2019-12-26 20:51:13,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-26 20:51:13,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:13,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-26 20:51:13,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-26 20:51:13,636 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 16 states. [2019-12-26 20:51:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:13,900 INFO L93 Difference]: Finished difference Result 51 states and 104 transitions. [2019-12-26 20:51:13,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:51:13,900 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-26 20:51:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:13,901 INFO L225 Difference]: With dead ends: 51 [2019-12-26 20:51:13,901 INFO L226 Difference]: Without dead ends: 48 [2019-12-26 20:51:13,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:51:13,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-26 20:51:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-12-26 20:51:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-26 20:51:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-26 20:51:13,904 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 19 [2019-12-26 20:51:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:13,904 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-26 20:51:13,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-26 20:51:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-26 20:51:13,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-26 20:51:13,904 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:13,905 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:14,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:14,106 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:14,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:14,107 INFO L82 PathProgramCache]: Analyzing trace with hash -65021205, now seen corresponding path program 23 times [2019-12-26 20:51:14,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:14,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063777214] [2019-12-26 20:51:14,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:14,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063777214] [2019-12-26 20:51:14,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345509204] [2019-12-26 20:51:14,232 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:14,284 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-26 20:51:14,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:14,286 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-26 20:51:14,286 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:14,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:14,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-26 20:51:14,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079887583] [2019-12-26 20:51:14,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-26 20:51:14,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:14,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-26 20:51:14,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:51:14,314 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 17 states. [2019-12-26 20:51:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:14,612 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2019-12-26 20:51:14,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-26 20:51:14,612 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-26 20:51:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:14,612 INFO L225 Difference]: With dead ends: 52 [2019-12-26 20:51:14,613 INFO L226 Difference]: Without dead ends: 49 [2019-12-26 20:51:14,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:51:14,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-26 20:51:14,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2019-12-26 20:51:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-26 20:51:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-26 20:51:14,615 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 20 [2019-12-26 20:51:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:14,615 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-26 20:51:14,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-26 20:51:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-26 20:51:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-26 20:51:14,616 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:14,616 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:14,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:14,819 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:14,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1656842783, now seen corresponding path program 24 times [2019-12-26 20:51:14,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:14,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100431690] [2019-12-26 20:51:14,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:14,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100431690] [2019-12-26 20:51:14,966 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696893165] [2019-12-26 20:51:14,966 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 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 [2019-12-26 20:51:15,033 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-26 20:51:15,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:15,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-26 20:51:15,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:15,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:15,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-26 20:51:15,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848544371] [2019-12-26 20:51:15,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-26 20:51:15,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:15,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-26 20:51:15,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-26 20:51:15,062 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 17 states. [2019-12-26 20:51:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:15,335 INFO L93 Difference]: Finished difference Result 53 states and 108 transitions. [2019-12-26 20:51:15,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-26 20:51:15,336 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-26 20:51:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:15,337 INFO L225 Difference]: With dead ends: 53 [2019-12-26 20:51:15,337 INFO L226 Difference]: Without dead ends: 50 [2019-12-26 20:51:15,338 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:51:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-26 20:51:15,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-26 20:51:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-26 20:51:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2019-12-26 20:51:15,341 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 20 [2019-12-26 20:51:15,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:15,341 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2019-12-26 20:51:15,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-26 20:51:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2019-12-26 20:51:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-26 20:51:15,342 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:15,342 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:15,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:15,546 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2015657050, now seen corresponding path program 25 times [2019-12-26 20:51:15,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:15,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999631157] [2019-12-26 20:51:15,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:15,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999631157] [2019-12-26 20:51:15,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248828092] [2019-12-26 20:51:15,678 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 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 [2019-12-26 20:51:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:15,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-26 20:51:15,734 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:15,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:15,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-26 20:51:15,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994851014] [2019-12-26 20:51:15,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:51:15,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:15,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:51:15,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:51:15,752 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand 18 states. [2019-12-26 20:51:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:16,089 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-12-26 20:51:16,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:51:16,090 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-12-26 20:51:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:16,090 INFO L225 Difference]: With dead ends: 54 [2019-12-26 20:51:16,090 INFO L226 Difference]: Without dead ends: 51 [2019-12-26 20:51:16,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:51:16,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-26 20:51:16,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2019-12-26 20:51:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-26 20:51:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 68 transitions. [2019-12-26 20:51:16,092 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 68 transitions. Word has length 21 [2019-12-26 20:51:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:16,093 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 68 transitions. [2019-12-26 20:51:16,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:51:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 68 transitions. [2019-12-26 20:51:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-26 20:51:16,093 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:16,093 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:16,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:16,296 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:16,296 INFO L82 PathProgramCache]: Analyzing trace with hash -177481222, now seen corresponding path program 26 times [2019-12-26 20:51:16,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:16,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874630547] [2019-12-26 20:51:16,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:16,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874630547] [2019-12-26 20:51:16,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315585024] [2019-12-26 20:51:16,428 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 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 [2019-12-26 20:51:16,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:16,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:16,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-26 20:51:16,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:16,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:16,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-26 20:51:16,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134146166] [2019-12-26 20:51:16,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-26 20:51:16,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:16,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-26 20:51:16,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-26 20:51:16,501 INFO L87 Difference]: Start difference. First operand 33 states and 68 transitions. Second operand 18 states. [2019-12-26 20:51:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:16,801 INFO L93 Difference]: Finished difference Result 55 states and 112 transitions. [2019-12-26 20:51:16,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:51:16,802 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-12-26 20:51:16,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:16,803 INFO L225 Difference]: With dead ends: 55 [2019-12-26 20:51:16,803 INFO L226 Difference]: Without dead ends: 52 [2019-12-26 20:51:16,805 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=651, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:51:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-26 20:51:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-26 20:51:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-26 20:51:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-26 20:51:16,808 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 21 [2019-12-26 20:51:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:16,809 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-26 20:51:16,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-26 20:51:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-26 20:51:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-26 20:51:16,811 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:16,811 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:17,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:17,015 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:17,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:17,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1939140947, now seen corresponding path program 27 times [2019-12-26 20:51:17,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:17,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571839687] [2019-12-26 20:51:17,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:17,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571839687] [2019-12-26 20:51:17,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251305890] [2019-12-26 20:51:17,148 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 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 [2019-12-26 20:51:17,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-26 20:51:17,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:17,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-26 20:51:17,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:17,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:17,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-26 20:51:17,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370691094] [2019-12-26 20:51:17,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-26 20:51:17,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:17,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-26 20:51:17,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:51:17,239 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 19 states. [2019-12-26 20:51:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:17,609 INFO L93 Difference]: Finished difference Result 56 states and 114 transitions. [2019-12-26 20:51:17,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-26 20:51:17,610 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-12-26 20:51:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:17,611 INFO L225 Difference]: With dead ends: 56 [2019-12-26 20:51:17,611 INFO L226 Difference]: Without dead ends: 53 [2019-12-26 20:51:17,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2019-12-26 20:51:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-26 20:51:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2019-12-26 20:51:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-26 20:51:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-26 20:51:17,614 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 22 [2019-12-26 20:51:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:17,614 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-26 20:51:17,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-26 20:51:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-26 20:51:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-26 20:51:17,615 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:17,615 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:17,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:17,818 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:17,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:17,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1206950281, now seen corresponding path program 28 times [2019-12-26 20:51:17,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:17,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164438305] [2019-12-26 20:51:17,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:18,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164438305] [2019-12-26 20:51:18,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835081483] [2019-12-26 20:51:18,050 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 [2019-12-26 20:51:18,129 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:18,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:18,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-26 20:51:18,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:18,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:18,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-26 20:51:18,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200506493] [2019-12-26 20:51:18,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-26 20:51:18,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:18,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-26 20:51:18,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-26 20:51:18,190 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 19 states. [2019-12-26 20:51:18,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:18,691 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-26 20:51:18,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-26 20:51:18,692 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-12-26 20:51:18,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:18,693 INFO L225 Difference]: With dead ends: 57 [2019-12-26 20:51:18,693 INFO L226 Difference]: Without dead ends: 54 [2019-12-26 20:51:18,694 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:51:18,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-26 20:51:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-26 20:51:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-26 20:51:18,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2019-12-26 20:51:18,700 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 22 [2019-12-26 20:51:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:18,701 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2019-12-26 20:51:18,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-26 20:51:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2019-12-26 20:51:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-26 20:51:18,702 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:18,703 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:18,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:18,907 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:18,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash -16172482, now seen corresponding path program 29 times [2019-12-26 20:51:18,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:18,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480713782] [2019-12-26 20:51:18,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:19,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480713782] [2019-12-26 20:51:19,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123046873] [2019-12-26 20:51:19,071 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 [2019-12-26 20:51:19,145 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-26 20:51:19,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:19,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-26 20:51:19,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:19,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:19,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-26 20:51:19,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706639992] [2019-12-26 20:51:19,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-26 20:51:19,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:19,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-26 20:51:19,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:51:19,187 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand 20 states. [2019-12-26 20:51:19,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:19,646 INFO L93 Difference]: Finished difference Result 58 states and 118 transitions. [2019-12-26 20:51:19,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:51:19,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-12-26 20:51:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:19,647 INFO L225 Difference]: With dead ends: 58 [2019-12-26 20:51:19,647 INFO L226 Difference]: Without dead ends: 55 [2019-12-26 20:51:19,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=844, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:51:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-26 20:51:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2019-12-26 20:51:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-26 20:51:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-12-26 20:51:19,650 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 23 [2019-12-26 20:51:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:19,650 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-12-26 20:51:19,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-26 20:51:19,650 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-12-26 20:51:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-26 20:51:19,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:19,651 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:19,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:19,854 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:19,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1239247010, now seen corresponding path program 30 times [2019-12-26 20:51:19,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:19,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748602195] [2019-12-26 20:51:19,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:20,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748602195] [2019-12-26 20:51:20,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863091423] [2019-12-26 20:51:20,023 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 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 [2019-12-26 20:51:20,095 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-26 20:51:20,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:20,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-26 20:51:20,097 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:20,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:20,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-26 20:51:20,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730292128] [2019-12-26 20:51:20,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-26 20:51:20,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:20,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-26 20:51:20,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-26 20:51:20,127 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 20 states. [2019-12-26 20:51:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:20,517 INFO L93 Difference]: Finished difference Result 59 states and 120 transitions. [2019-12-26 20:51:20,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:51:20,517 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-12-26 20:51:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:20,518 INFO L225 Difference]: With dead ends: 59 [2019-12-26 20:51:20,518 INFO L226 Difference]: Without dead ends: 56 [2019-12-26 20:51:20,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=429, Invalid=831, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:51:20,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-26 20:51:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-26 20:51:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-26 20:51:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2019-12-26 20:51:20,521 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 23 [2019-12-26 20:51:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:20,521 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2019-12-26 20:51:20,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-26 20:51:20,522 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2019-12-26 20:51:20,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-26 20:51:20,522 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:20,522 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:20,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:20,724 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:20,725 INFO L82 PathProgramCache]: Analyzing trace with hash -501346885, now seen corresponding path program 31 times [2019-12-26 20:51:20,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:20,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446621824] [2019-12-26 20:51:20,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:20,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446621824] [2019-12-26 20:51:20,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127710910] [2019-12-26 20:51:20,891 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 [2019-12-26 20:51:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:20,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-26 20:51:20,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:21,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:21,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-26 20:51:21,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331713765] [2019-12-26 20:51:21,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-26 20:51:21,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:21,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-26 20:51:21,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:51:21,011 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand 21 states. [2019-12-26 20:51:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:21,527 INFO L93 Difference]: Finished difference Result 60 states and 122 transitions. [2019-12-26 20:51:21,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-26 20:51:21,528 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-12-26 20:51:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:21,528 INFO L225 Difference]: With dead ends: 60 [2019-12-26 20:51:21,528 INFO L226 Difference]: Without dead ends: 57 [2019-12-26 20:51:21,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=442, Invalid=890, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:51:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-26 20:51:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-12-26 20:51:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-26 20:51:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-26 20:51:21,532 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 24 [2019-12-26 20:51:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:21,533 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-26 20:51:21,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-26 20:51:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-26 20:51:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-26 20:51:21,533 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:21,533 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:21,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:21,737 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:21,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:21,737 INFO L82 PathProgramCache]: Analyzing trace with hash -238048049, now seen corresponding path program 32 times [2019-12-26 20:51:21,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:21,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638475609] [2019-12-26 20:51:21,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:21,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638475609] [2019-12-26 20:51:21,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020578790] [2019-12-26 20:51:21,934 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 [2019-12-26 20:51:21,997 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:21,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:21,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-26 20:51:21,999 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:22,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:22,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-26 20:51:22,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995683386] [2019-12-26 20:51:22,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-26 20:51:22,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:22,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-26 20:51:22,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-26 20:51:22,028 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 21 states. [2019-12-26 20:51:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:22,441 INFO L93 Difference]: Finished difference Result 61 states and 124 transitions. [2019-12-26 20:51:22,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-26 20:51:22,441 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-12-26 20:51:22,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:22,442 INFO L225 Difference]: With dead ends: 61 [2019-12-26 20:51:22,442 INFO L226 Difference]: Without dead ends: 58 [2019-12-26 20:51:22,443 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2019-12-26 20:51:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-26 20:51:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-26 20:51:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-26 20:51:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2019-12-26 20:51:22,445 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 24 [2019-12-26 20:51:22,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:22,446 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2019-12-26 20:51:22,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-26 20:51:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2019-12-26 20:51:22,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-26 20:51:22,446 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:22,446 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:22,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:22,647 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:22,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:22,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1638116054, now seen corresponding path program 33 times [2019-12-26 20:51:22,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:22,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46344613] [2019-12-26 20:51:22,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:22,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46344613] [2019-12-26 20:51:22,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520234923] [2019-12-26 20:51:22,855 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:22,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-26 20:51:22,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:22,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-26 20:51:22,917 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:22,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:22,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-26 20:51:22,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127845881] [2019-12-26 20:51:22,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-26 20:51:22,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:22,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-26 20:51:22,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:51:22,947 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand 22 states. [2019-12-26 20:51:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:23,458 INFO L93 Difference]: Finished difference Result 62 states and 126 transitions. [2019-12-26 20:51:23,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:51:23,459 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-12-26 20:51:23,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:23,460 INFO L225 Difference]: With dead ends: 62 [2019-12-26 20:51:23,460 INFO L226 Difference]: Without dead ends: 59 [2019-12-26 20:51:23,460 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=512, Invalid=1048, Unknown=0, NotChecked=0, Total=1560 [2019-12-26 20:51:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-26 20:51:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2019-12-26 20:51:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-26 20:51:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 76 transitions. [2019-12-26 20:51:23,462 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 76 transitions. Word has length 25 [2019-12-26 20:51:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:23,463 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 76 transitions. [2019-12-26 20:51:23,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-26 20:51:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 76 transitions. [2019-12-26 20:51:23,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-26 20:51:23,463 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:23,463 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:23,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:23,664 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1210445130, now seen corresponding path program 34 times [2019-12-26 20:51:23,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:23,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963763869] [2019-12-26 20:51:23,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:23,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963763869] [2019-12-26 20:51:23,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457035957] [2019-12-26 20:51:23,864 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:23,933 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:23,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:23,934 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-26 20:51:23,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:23,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:23,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-26 20:51:23,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856722246] [2019-12-26 20:51:23,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-26 20:51:23,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:23,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-26 20:51:23,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-26 20:51:23,960 INFO L87 Difference]: Start difference. First operand 37 states and 76 transitions. Second operand 22 states. [2019-12-26 20:51:24,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:24,411 INFO L93 Difference]: Finished difference Result 63 states and 128 transitions. [2019-12-26 20:51:24,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:51:24,411 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-12-26 20:51:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:24,412 INFO L225 Difference]: With dead ends: 63 [2019-12-26 20:51:24,412 INFO L226 Difference]: Without dead ends: 60 [2019-12-26 20:51:24,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=527, Invalid=1033, Unknown=0, NotChecked=0, Total=1560 [2019-12-26 20:51:24,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-26 20:51:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-26 20:51:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-26 20:51:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 122 transitions. [2019-12-26 20:51:24,417 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 122 transitions. Word has length 25 [2019-12-26 20:51:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:24,417 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 122 transitions. [2019-12-26 20:51:24,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-26 20:51:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 122 transitions. [2019-12-26 20:51:24,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-26 20:51:24,417 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:24,418 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:24,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:24,621 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:24,621 INFO L82 PathProgramCache]: Analyzing trace with hash -758009821, now seen corresponding path program 35 times [2019-12-26 20:51:24,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:24,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678595189] [2019-12-26 20:51:24,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:24,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678595189] [2019-12-26 20:51:24,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473155966] [2019-12-26 20:51:24,837 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:24,894 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-26 20:51:24,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:24,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-26 20:51:24,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:24,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:24,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-26 20:51:24,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640304579] [2019-12-26 20:51:24,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-26 20:51:24,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:24,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-26 20:51:24,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:51:24,927 INFO L87 Difference]: Start difference. First operand 60 states and 122 transitions. Second operand 23 states. [2019-12-26 20:51:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:25,385 INFO L93 Difference]: Finished difference Result 64 states and 130 transitions. [2019-12-26 20:51:25,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-26 20:51:25,385 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-12-26 20:51:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:25,386 INFO L225 Difference]: With dead ends: 64 [2019-12-26 20:51:25,386 INFO L226 Difference]: Without dead ends: 61 [2019-12-26 20:51:25,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=541, Invalid=1099, Unknown=0, NotChecked=0, Total=1640 [2019-12-26 20:51:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-26 20:51:25,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2019-12-26 20:51:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-26 20:51:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-26 20:51:25,389 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 26 [2019-12-26 20:51:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:25,389 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-26 20:51:25,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-26 20:51:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-26 20:51:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-26 20:51:25,390 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:25,390 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:25,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:25,591 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:25,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1130906329, now seen corresponding path program 36 times [2019-12-26 20:51:25,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:25,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237317117] [2019-12-26 20:51:25,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:25,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237317117] [2019-12-26 20:51:25,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340146809] [2019-12-26 20:51:25,860 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:25,949 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-12-26 20:51:25,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:25,951 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-26 20:51:25,952 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:25,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:25,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-26 20:51:25,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977809621] [2019-12-26 20:51:25,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-26 20:51:25,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:25,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-26 20:51:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-26 20:51:25,987 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 23 states. [2019-12-26 20:51:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:26,454 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-26 20:51:26,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-26 20:51:26,457 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-12-26 20:51:26,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:26,458 INFO L225 Difference]: With dead ends: 65 [2019-12-26 20:51:26,459 INFO L226 Difference]: Without dead ends: 62 [2019-12-26 20:51:26,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=526, Invalid=1196, Unknown=0, NotChecked=0, Total=1722 [2019-12-26 20:51:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-26 20:51:26,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-26 20:51:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-26 20:51:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2019-12-26 20:51:26,462 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 26 [2019-12-26 20:51:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:26,463 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2019-12-26 20:51:26,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-26 20:51:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2019-12-26 20:51:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-26 20:51:26,463 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:26,463 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:26,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:26,667 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash -2023467666, now seen corresponding path program 37 times [2019-12-26 20:51:26,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:26,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36523573] [2019-12-26 20:51:26,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:26,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36523573] [2019-12-26 20:51:26,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210333299] [2019-12-26 20:51:26,879 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:26,933 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-26 20:51:26,934 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:26,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:26,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-26 20:51:26,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842061209] [2019-12-26 20:51:26,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-26 20:51:26,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:26,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-26 20:51:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:51:26,976 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand 24 states. [2019-12-26 20:51:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:27,491 INFO L93 Difference]: Finished difference Result 66 states and 134 transitions. [2019-12-26 20:51:27,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:51:27,492 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-12-26 20:51:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:27,493 INFO L225 Difference]: With dead ends: 66 [2019-12-26 20:51:27,493 INFO L226 Difference]: Without dead ends: 63 [2019-12-26 20:51:27,494 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2019-12-26 20:51:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-26 20:51:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2019-12-26 20:51:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-26 20:51:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 80 transitions. [2019-12-26 20:51:27,497 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 80 transitions. Word has length 27 [2019-12-26 20:51:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:27,497 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 80 transitions. [2019-12-26 20:51:27,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-26 20:51:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 80 transitions. [2019-12-26 20:51:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-26 20:51:27,497 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:27,498 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:27,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:27,698 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:27,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:27,699 INFO L82 PathProgramCache]: Analyzing trace with hash -698357774, now seen corresponding path program 38 times [2019-12-26 20:51:27,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:27,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255122174] [2019-12-26 20:51:27,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:27,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255122174] [2019-12-26 20:51:27,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832018913] [2019-12-26 20:51:27,922 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:51:27,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:27,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:27,971 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-26 20:51:27,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:28,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:28,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-26 20:51:28,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001400079] [2019-12-26 20:51:28,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-26 20:51:28,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:28,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-26 20:51:28,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:51:28,020 INFO L87 Difference]: Start difference. First operand 39 states and 80 transitions. Second operand 24 states. [2019-12-26 20:51:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:28,513 INFO L93 Difference]: Finished difference Result 67 states and 136 transitions. [2019-12-26 20:51:28,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:51:28,513 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-12-26 20:51:28,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:28,514 INFO L225 Difference]: With dead ends: 67 [2019-12-26 20:51:28,514 INFO L226 Difference]: Without dead ends: 64 [2019-12-26 20:51:28,515 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=635, Invalid=1257, Unknown=0, NotChecked=0, Total=1892 [2019-12-26 20:51:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-26 20:51:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-12-26 20:51:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-26 20:51:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2019-12-26 20:51:28,518 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 27 [2019-12-26 20:51:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:28,518 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2019-12-26 20:51:28,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-26 20:51:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2019-12-26 20:51:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-26 20:51:28,519 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:28,519 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:28,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:28,722 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:28,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1697011851, now seen corresponding path program 39 times [2019-12-26 20:51:28,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:28,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957571987] [2019-12-26 20:51:28,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:28,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957571987] [2019-12-26 20:51:28,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969064954] [2019-12-26 20:51:28,918 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:28,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-12-26 20:51:28,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:28,980 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-26 20:51:28,981 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:29,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:29,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-26 20:51:29,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440294600] [2019-12-26 20:51:29,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-26 20:51:29,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:29,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-26 20:51:29,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:51:29,024 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand 25 states. [2019-12-26 20:51:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:29,594 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2019-12-26 20:51:29,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:51:29,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2019-12-26 20:51:29,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:29,598 INFO L225 Difference]: With dead ends: 68 [2019-12-26 20:51:29,599 INFO L226 Difference]: Without dead ends: 65 [2019-12-26 20:51:29,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=650, Invalid=1330, Unknown=0, NotChecked=0, Total=1980 [2019-12-26 20:51:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-26 20:51:29,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2019-12-26 20:51:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-26 20:51:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-26 20:51:29,602 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 28 [2019-12-26 20:51:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:29,602 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-26 20:51:29,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-26 20:51:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-26 20:51:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-26 20:51:29,603 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:29,603 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:29,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:29,806 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash -174254209, now seen corresponding path program 40 times [2019-12-26 20:51:29,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:29,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386157691] [2019-12-26 20:51:29,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:30,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386157691] [2019-12-26 20:51:30,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899224739] [2019-12-26 20:51:30,068 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:30,118 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:30,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:30,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-26 20:51:30,120 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:30,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:30,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-26 20:51:30,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695023737] [2019-12-26 20:51:30,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-26 20:51:30,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:30,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-26 20:51:30,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2019-12-26 20:51:30,142 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 25 states. [2019-12-26 20:51:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:30,677 INFO L93 Difference]: Finished difference Result 69 states and 140 transitions. [2019-12-26 20:51:30,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-26 20:51:30,678 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2019-12-26 20:51:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:30,679 INFO L225 Difference]: With dead ends: 69 [2019-12-26 20:51:30,680 INFO L226 Difference]: Without dead ends: 66 [2019-12-26 20:51:30,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1396, Unknown=0, NotChecked=0, Total=2070 [2019-12-26 20:51:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-26 20:51:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-12-26 20:51:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-26 20:51:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 134 transitions. [2019-12-26 20:51:30,683 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 134 transitions. Word has length 28 [2019-12-26 20:51:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:30,683 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 134 transitions. [2019-12-26 20:51:30,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-26 20:51:30,684 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 134 transitions. [2019-12-26 20:51:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-26 20:51:30,684 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:30,684 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:30,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:30,885 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:30,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:30,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1067760134, now seen corresponding path program 41 times [2019-12-26 20:51:30,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:30,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575885457] [2019-12-26 20:51:30,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:31,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575885457] [2019-12-26 20:51:31,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841517273] [2019-12-26 20:51:31,114 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:31,176 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-12-26 20:51:31,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:31,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-26 20:51:31,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:31,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:31,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-26 20:51:31,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699569401] [2019-12-26 20:51:31,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-26 20:51:31,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:31,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-26 20:51:31,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:51:31,210 INFO L87 Difference]: Start difference. First operand 66 states and 134 transitions. Second operand 26 states. [2019-12-26 20:51:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:31,838 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2019-12-26 20:51:31,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:51:31,839 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2019-12-26 20:51:31,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:31,840 INFO L225 Difference]: With dead ends: 70 [2019-12-26 20:51:31,840 INFO L226 Difference]: Without dead ends: 67 [2019-12-26 20:51:31,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=734, Invalid=1522, Unknown=0, NotChecked=0, Total=2256 [2019-12-26 20:51:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-26 20:51:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2019-12-26 20:51:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-26 20:51:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 84 transitions. [2019-12-26 20:51:31,844 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 84 transitions. Word has length 29 [2019-12-26 20:51:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:31,844 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 84 transitions. [2019-12-26 20:51:31,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-26 20:51:31,844 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 84 transitions. [2019-12-26 20:51:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-26 20:51:31,845 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:31,845 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:32,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:32,048 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:32,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1106913126, now seen corresponding path program 42 times [2019-12-26 20:51:32,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:32,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457682596] [2019-12-26 20:51:32,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:32,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457682596] [2019-12-26 20:51:32,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222062323] [2019-12-26 20:51:32,333 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:32,409 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-12-26 20:51:32,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:32,411 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-26 20:51:32,412 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:32,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:32,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-26 20:51:32,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988024697] [2019-12-26 20:51:32,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-26 20:51:32,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-26 20:51:32,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2019-12-26 20:51:32,439 INFO L87 Difference]: Start difference. First operand 41 states and 84 transitions. Second operand 26 states. [2019-12-26 20:51:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:33,145 INFO L93 Difference]: Finished difference Result 71 states and 144 transitions. [2019-12-26 20:51:33,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:51:33,145 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2019-12-26 20:51:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:33,146 INFO L225 Difference]: With dead ends: 71 [2019-12-26 20:51:33,146 INFO L226 Difference]: Without dead ends: 68 [2019-12-26 20:51:33,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=753, Invalid=1503, Unknown=0, NotChecked=0, Total=2256 [2019-12-26 20:51:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-26 20:51:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-26 20:51:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-26 20:51:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 138 transitions. [2019-12-26 20:51:33,150 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 138 transitions. Word has length 29 [2019-12-26 20:51:33,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:33,150 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 138 transitions. [2019-12-26 20:51:33,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-26 20:51:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 138 transitions. [2019-12-26 20:51:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-26 20:51:33,151 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:33,151 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:33,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:33,354 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:33,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1259174157, now seen corresponding path program 43 times [2019-12-26 20:51:33,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:33,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891673767] [2019-12-26 20:51:33,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:33,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891673767] [2019-12-26 20:51:33,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925059424] [2019-12-26 20:51:33,604 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:51:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:33,669 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-26 20:51:33,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:33,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:33,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-26 20:51:33,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698086054] [2019-12-26 20:51:33,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-26 20:51:33,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:33,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-26 20:51:33,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:51:33,709 INFO L87 Difference]: Start difference. First operand 68 states and 138 transitions. Second operand 27 states. [2019-12-26 20:51:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:34,327 INFO L93 Difference]: Finished difference Result 72 states and 146 transitions. [2019-12-26 20:51:34,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-26 20:51:34,328 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2019-12-26 20:51:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:34,329 INFO L225 Difference]: With dead ends: 72 [2019-12-26 20:51:34,329 INFO L226 Difference]: Without dead ends: 69 [2019-12-26 20:51:34,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=769, Invalid=1583, Unknown=0, NotChecked=0, Total=2352 [2019-12-26 20:51:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-26 20:51:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2019-12-26 20:51:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-26 20:51:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-26 20:51:34,332 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 30 [2019-12-26 20:51:34,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:34,332 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-26 20:51:34,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-26 20:51:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-26 20:51:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-26 20:51:34,332 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:34,333 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:34,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:34,536 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:34,536 INFO L82 PathProgramCache]: Analyzing trace with hash 45431767, now seen corresponding path program 44 times [2019-12-26 20:51:34,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:34,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900910101] [2019-12-26 20:51:34,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:34,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900910101] [2019-12-26 20:51:34,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016647254] [2019-12-26 20:51:34,776 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:34,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:34,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:34,837 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-26 20:51:34,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:34,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:34,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-26 20:51:34,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894814154] [2019-12-26 20:51:34,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-26 20:51:34,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:34,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-26 20:51:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2019-12-26 20:51:34,867 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 27 states. [2019-12-26 20:51:35,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:35,466 INFO L93 Difference]: Finished difference Result 73 states and 148 transitions. [2019-12-26 20:51:35,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-26 20:51:35,466 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2019-12-26 20:51:35,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:35,467 INFO L225 Difference]: With dead ends: 73 [2019-12-26 20:51:35,467 INFO L226 Difference]: Without dead ends: 70 [2019-12-26 20:51:35,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=795, Invalid=1655, Unknown=0, NotChecked=0, Total=2450 [2019-12-26 20:51:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-26 20:51:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-12-26 20:51:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-26 20:51:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 142 transitions. [2019-12-26 20:51:35,472 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 142 transitions. Word has length 30 [2019-12-26 20:51:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:35,473 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 142 transitions. [2019-12-26 20:51:35,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-26 20:51:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 142 transitions. [2019-12-26 20:51:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-26 20:51:35,473 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:35,474 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:35,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:35,677 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:35,677 INFO L82 PathProgramCache]: Analyzing trace with hash -379692898, now seen corresponding path program 45 times [2019-12-26 20:51:35,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:35,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971479494] [2019-12-26 20:51:35,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:35,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971479494] [2019-12-26 20:51:35,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75928357] [2019-12-26 20:51:35,935 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:36,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-12-26 20:51:36,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:36,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-26 20:51:36,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:36,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:36,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-26 20:51:36,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114226908] [2019-12-26 20:51:36,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-26 20:51:36,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-26 20:51:36,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:51:36,031 INFO L87 Difference]: Start difference. First operand 70 states and 142 transitions. Second operand 28 states. [2019-12-26 20:51:36,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:36,675 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2019-12-26 20:51:36,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-26 20:51:36,676 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2019-12-26 20:51:36,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:36,677 INFO L225 Difference]: With dead ends: 74 [2019-12-26 20:51:36,677 INFO L226 Difference]: Without dead ends: 71 [2019-12-26 20:51:36,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=860, Invalid=1792, Unknown=0, NotChecked=0, Total=2652 [2019-12-26 20:51:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-26 20:51:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2019-12-26 20:51:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-26 20:51:36,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 88 transitions. [2019-12-26 20:51:36,681 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 88 transitions. Word has length 31 [2019-12-26 20:51:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:36,681 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 88 transitions. [2019-12-26 20:51:36,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-26 20:51:36,681 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 88 transitions. [2019-12-26 20:51:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-26 20:51:36,682 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:36,682 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:36,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:36,885 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:36,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:36,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1408384834, now seen corresponding path program 46 times [2019-12-26 20:51:36,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:36,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759948798] [2019-12-26 20:51:36,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:37,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759948798] [2019-12-26 20:51:37,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406356156] [2019-12-26 20:51:37,168 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 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 [2019-12-26 20:51:37,225 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:37,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:37,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-26 20:51:37,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:37,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:37,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-26 20:51:37,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559417537] [2019-12-26 20:51:37,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-26 20:51:37,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:37,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-26 20:51:37,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2019-12-26 20:51:37,252 INFO L87 Difference]: Start difference. First operand 43 states and 88 transitions. Second operand 28 states. [2019-12-26 20:51:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:37,898 INFO L93 Difference]: Finished difference Result 75 states and 152 transitions. [2019-12-26 20:51:37,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-26 20:51:37,898 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2019-12-26 20:51:37,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:37,899 INFO L225 Difference]: With dead ends: 75 [2019-12-26 20:51:37,899 INFO L226 Difference]: Without dead ends: 72 [2019-12-26 20:51:37,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=881, Invalid=1771, Unknown=0, NotChecked=0, Total=2652 [2019-12-26 20:51:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-26 20:51:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-12-26 20:51:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-26 20:51:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 146 transitions. [2019-12-26 20:51:37,903 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 146 transitions. Word has length 31 [2019-12-26 20:51:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:37,904 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 146 transitions. [2019-12-26 20:51:37,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-26 20:51:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 146 transitions. [2019-12-26 20:51:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-26 20:51:37,904 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:37,904 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:38,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:38,108 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:38,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1114422107, now seen corresponding path program 47 times [2019-12-26 20:51:38,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:38,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933323427] [2019-12-26 20:51:38,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:38,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933323427] [2019-12-26 20:51:38,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957817582] [2019-12-26 20:51:38,379 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 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 [2019-12-26 20:51:38,442 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-12-26 20:51:38,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:38,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-26 20:51:38,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:38,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:38,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-26 20:51:38,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499774203] [2019-12-26 20:51:38,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-26 20:51:38,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:38,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-26 20:51:38,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:51:38,467 INFO L87 Difference]: Start difference. First operand 72 states and 146 transitions. Second operand 29 states. [2019-12-26 20:51:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:39,172 INFO L93 Difference]: Finished difference Result 76 states and 154 transitions. [2019-12-26 20:51:39,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-26 20:51:39,172 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2019-12-26 20:51:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:39,173 INFO L225 Difference]: With dead ends: 76 [2019-12-26 20:51:39,173 INFO L226 Difference]: Without dead ends: 73 [2019-12-26 20:51:39,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=898, Invalid=1858, Unknown=0, NotChecked=0, Total=2756 [2019-12-26 20:51:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-26 20:51:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2019-12-26 20:51:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-26 20:51:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-26 20:51:39,177 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 32 [2019-12-26 20:51:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:39,177 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-26 20:51:39,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-26 20:51:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-26 20:51:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-26 20:51:39,178 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:39,178 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:39,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:39,381 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:39,382 INFO L82 PathProgramCache]: Analyzing trace with hash 710257199, now seen corresponding path program 48 times [2019-12-26 20:51:39,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:39,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890921012] [2019-12-26 20:51:39,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:39,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890921012] [2019-12-26 20:51:39,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895822899] [2019-12-26 20:51:39,656 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 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 [2019-12-26 20:51:39,724 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-26 20:51:39,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:39,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-26 20:51:39,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:39,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:39,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-26 20:51:39,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290861853] [2019-12-26 20:51:39,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-26 20:51:39,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:39,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-26 20:51:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2019-12-26 20:51:39,763 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 29 states. [2019-12-26 20:51:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:40,432 INFO L93 Difference]: Finished difference Result 77 states and 156 transitions. [2019-12-26 20:51:40,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-26 20:51:40,433 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2019-12-26 20:51:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:40,434 INFO L225 Difference]: With dead ends: 77 [2019-12-26 20:51:40,434 INFO L226 Difference]: Without dead ends: 74 [2019-12-26 20:51:40,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=926, Invalid=1936, Unknown=0, NotChecked=0, Total=2862 [2019-12-26 20:51:40,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-26 20:51:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-12-26 20:51:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-26 20:51:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 150 transitions. [2019-12-26 20:51:40,438 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 150 transitions. Word has length 32 [2019-12-26 20:51:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:40,438 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 150 transitions. [2019-12-26 20:51:40,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-26 20:51:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 150 transitions. [2019-12-26 20:51:40,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-26 20:51:40,439 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:40,439 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:40,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:40,642 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:40,643 INFO L82 PathProgramCache]: Analyzing trace with hash 187347254, now seen corresponding path program 49 times [2019-12-26 20:51:40,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:40,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903056325] [2019-12-26 20:51:40,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:40,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903056325] [2019-12-26 20:51:40,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269576076] [2019-12-26 20:51:40,934 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 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 [2019-12-26 20:51:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:40,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-26 20:51:40,996 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:41,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:41,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-26 20:51:41,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067274089] [2019-12-26 20:51:41,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-26 20:51:41,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:41,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-26 20:51:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:51:41,028 INFO L87 Difference]: Start difference. First operand 74 states and 150 transitions. Second operand 30 states. [2019-12-26 20:51:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:41,764 INFO L93 Difference]: Finished difference Result 78 states and 158 transitions. [2019-12-26 20:51:41,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-26 20:51:41,765 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2019-12-26 20:51:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:41,766 INFO L225 Difference]: With dead ends: 78 [2019-12-26 20:51:41,766 INFO L226 Difference]: Without dead ends: 75 [2019-12-26 20:51:41,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=996, Invalid=2084, Unknown=0, NotChecked=0, Total=3080 [2019-12-26 20:51:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-26 20:51:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2019-12-26 20:51:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-26 20:51:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 92 transitions. [2019-12-26 20:51:41,769 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 92 transitions. Word has length 33 [2019-12-26 20:51:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:41,769 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 92 transitions. [2019-12-26 20:51:41,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-26 20:51:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 92 transitions. [2019-12-26 20:51:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-26 20:51:41,770 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:41,770 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:41,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:41,974 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:41,974 INFO L82 PathProgramCache]: Analyzing trace with hash 543136746, now seen corresponding path program 50 times [2019-12-26 20:51:41,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:41,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447144454] [2019-12-26 20:51:41,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:42,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447144454] [2019-12-26 20:51:42,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991097743] [2019-12-26 20:51:42,441 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 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 [2019-12-26 20:51:42,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:42,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:42,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-26 20:51:42,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:42,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:42,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-26 20:51:42,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311707617] [2019-12-26 20:51:42,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-26 20:51:42,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:42,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-26 20:51:42,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2019-12-26 20:51:42,586 INFO L87 Difference]: Start difference. First operand 45 states and 92 transitions. Second operand 30 states. [2019-12-26 20:51:43,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:43,609 INFO L93 Difference]: Finished difference Result 79 states and 160 transitions. [2019-12-26 20:51:43,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-26 20:51:43,609 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2019-12-26 20:51:43,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:43,610 INFO L225 Difference]: With dead ends: 79 [2019-12-26 20:51:43,610 INFO L226 Difference]: Without dead ends: 76 [2019-12-26 20:51:43,611 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1019, Invalid=2061, Unknown=0, NotChecked=0, Total=3080 [2019-12-26 20:51:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-26 20:51:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-12-26 20:51:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-26 20:51:43,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2019-12-26 20:51:43,613 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 33 [2019-12-26 20:51:43,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:43,614 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2019-12-26 20:51:43,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-26 20:51:43,614 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2019-12-26 20:51:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-26 20:51:43,614 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:43,615 INFO L411 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:43,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:43,818 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:43,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:43,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1512797635, now seen corresponding path program 51 times [2019-12-26 20:51:43,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:43,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019065566] [2019-12-26 20:51:43,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:44,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019065566] [2019-12-26 20:51:44,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468672030] [2019-12-26 20:51:44,162 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 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 [2019-12-26 20:51:44,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-12-26 20:51:44,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:44,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-26 20:51:44,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:44,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:44,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-26 20:51:44,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593864878] [2019-12-26 20:51:44,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-26 20:51:44,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:44,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-26 20:51:44,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:51:44,268 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand 31 states. [2019-12-26 20:51:45,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:45,054 INFO L93 Difference]: Finished difference Result 80 states and 162 transitions. [2019-12-26 20:51:45,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-26 20:51:45,054 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2019-12-26 20:51:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:45,055 INFO L225 Difference]: With dead ends: 80 [2019-12-26 20:51:45,055 INFO L226 Difference]: Without dead ends: 77 [2019-12-26 20:51:45,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1037, Invalid=2155, Unknown=0, NotChecked=0, Total=3192 [2019-12-26 20:51:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-26 20:51:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2019-12-26 20:51:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-26 20:51:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 94 transitions. [2019-12-26 20:51:45,058 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 94 transitions. Word has length 34 [2019-12-26 20:51:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:45,058 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 94 transitions. [2019-12-26 20:51:45,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-26 20:51:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 94 transitions. [2019-12-26 20:51:45,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-26 20:51:45,059 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:45,059 INFO L411 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:45,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:45,263 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:45,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:45,263 INFO L82 PathProgramCache]: Analyzing trace with hash -342629753, now seen corresponding path program 52 times [2019-12-26 20:51:45,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:45,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067619960] [2019-12-26 20:51:45,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:45,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067619960] [2019-12-26 20:51:45,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848159888] [2019-12-26 20:51:45,692 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 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 [2019-12-26 20:51:45,751 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:45,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:45,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-26 20:51:45,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:45,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:45,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-26 20:51:45,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968955907] [2019-12-26 20:51:45,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-26 20:51:45,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:45,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-26 20:51:45,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2019-12-26 20:51:45,779 INFO L87 Difference]: Start difference. First operand 46 states and 94 transitions. Second operand 31 states. [2019-12-26 20:51:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:46,533 INFO L93 Difference]: Finished difference Result 81 states and 164 transitions. [2019-12-26 20:51:46,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-26 20:51:46,533 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2019-12-26 20:51:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:46,534 INFO L225 Difference]: With dead ends: 81 [2019-12-26 20:51:46,534 INFO L226 Difference]: Without dead ends: 78 [2019-12-26 20:51:46,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1067, Invalid=2239, Unknown=0, NotChecked=0, Total=3306 [2019-12-26 20:51:46,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-26 20:51:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-12-26 20:51:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-26 20:51:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2019-12-26 20:51:46,538 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 34 [2019-12-26 20:51:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:46,538 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2019-12-26 20:51:46,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-26 20:51:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2019-12-26 20:51:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-26 20:51:46,539 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:46,539 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:46,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:46,743 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:46,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:46,743 INFO L82 PathProgramCache]: Analyzing trace with hash -347913266, now seen corresponding path program 53 times [2019-12-26 20:51:46,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:46,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519582870] [2019-12-26 20:51:46,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:47,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519582870] [2019-12-26 20:51:47,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065030133] [2019-12-26 20:51:47,053 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 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 [2019-12-26 20:51:47,122 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-12-26 20:51:47,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:47,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-26 20:51:47,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:47,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:47,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-26 20:51:47,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336915544] [2019-12-26 20:51:47,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-26 20:51:47,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:47,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-26 20:51:47,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:51:47,156 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand 32 states. [2019-12-26 20:51:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:47,951 INFO L93 Difference]: Finished difference Result 82 states and 166 transitions. [2019-12-26 20:51:47,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-26 20:51:47,952 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2019-12-26 20:51:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:47,953 INFO L225 Difference]: With dead ends: 82 [2019-12-26 20:51:47,953 INFO L226 Difference]: Without dead ends: 79 [2019-12-26 20:51:47,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1142, Invalid=2398, Unknown=0, NotChecked=0, Total=3540 [2019-12-26 20:51:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-26 20:51:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2019-12-26 20:51:47,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-26 20:51:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 96 transitions. [2019-12-26 20:51:47,956 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 96 transitions. Word has length 35 [2019-12-26 20:51:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:47,957 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 96 transitions. [2019-12-26 20:51:47,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-26 20:51:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 96 transitions. [2019-12-26 20:51:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-26 20:51:47,957 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:47,957 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:48,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:48,161 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:48,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:48,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2031587694, now seen corresponding path program 54 times [2019-12-26 20:51:48,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:48,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204888024] [2019-12-26 20:51:48,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:48,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204888024] [2019-12-26 20:51:48,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092360910] [2019-12-26 20:51:48,582 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 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 [2019-12-26 20:51:48,695 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-12-26 20:51:48,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:48,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-26 20:51:48,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:48,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:48,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-26 20:51:48,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83191229] [2019-12-26 20:51:48,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-26 20:51:48,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:48,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-26 20:51:48,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2019-12-26 20:51:48,744 INFO L87 Difference]: Start difference. First operand 47 states and 96 transitions. Second operand 32 states. [2019-12-26 20:51:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:49,509 INFO L93 Difference]: Finished difference Result 83 states and 168 transitions. [2019-12-26 20:51:49,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-26 20:51:49,509 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2019-12-26 20:51:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:49,510 INFO L225 Difference]: With dead ends: 83 [2019-12-26 20:51:49,511 INFO L226 Difference]: Without dead ends: 80 [2019-12-26 20:51:49,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1167, Invalid=2373, Unknown=0, NotChecked=0, Total=3540 [2019-12-26 20:51:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-26 20:51:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-12-26 20:51:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-26 20:51:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2019-12-26 20:51:49,514 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 35 [2019-12-26 20:51:49,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:49,515 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2019-12-26 20:51:49,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-26 20:51:49,515 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2019-12-26 20:51:49,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-26 20:51:49,515 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:49,515 INFO L411 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:49,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:49,719 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2099590699, now seen corresponding path program 55 times [2019-12-26 20:51:49,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:49,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508844087] [2019-12-26 20:51:49,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:50,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508844087] [2019-12-26 20:51:50,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817522284] [2019-12-26 20:51:50,044 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 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 [2019-12-26 20:51:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:50,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-26 20:51:50,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:50,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:50,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-26 20:51:50,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102537605] [2019-12-26 20:51:50,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-26 20:51:50,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:50,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-26 20:51:50,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2019-12-26 20:51:50,127 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 33 states. [2019-12-26 20:51:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:50,955 INFO L93 Difference]: Finished difference Result 84 states and 170 transitions. [2019-12-26 20:51:50,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-26 20:51:50,955 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2019-12-26 20:51:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:50,956 INFO L225 Difference]: With dead ends: 84 [2019-12-26 20:51:50,956 INFO L226 Difference]: Without dead ends: 81 [2019-12-26 20:51:50,957 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1186, Invalid=2474, Unknown=0, NotChecked=0, Total=3660 [2019-12-26 20:51:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-12-26 20:51:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2019-12-26 20:51:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-26 20:51:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-26 20:51:50,960 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 36 [2019-12-26 20:51:50,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:50,960 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-26 20:51:50,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-26 20:51:50,961 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-26 20:51:50,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-26 20:51:50,961 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:50,961 INFO L411 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:51,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:51,164 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:51,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:51,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1445291231, now seen corresponding path program 56 times [2019-12-26 20:51:51,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:51,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723938584] [2019-12-26 20:51:51,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:51,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723938584] [2019-12-26 20:51:51,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425968153] [2019-12-26 20:51:51,500 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 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 [2019-12-26 20:51:51,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:51:51,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:51,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-26 20:51:51,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:51,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:51,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-26 20:51:51,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058041342] [2019-12-26 20:51:51,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-26 20:51:51,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:51,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-26 20:51:51,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2019-12-26 20:51:51,587 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 33 states. [2019-12-26 20:51:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:52,423 INFO L93 Difference]: Finished difference Result 85 states and 172 transitions. [2019-12-26 20:51:52,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-26 20:51:52,424 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2019-12-26 20:51:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:52,425 INFO L225 Difference]: With dead ends: 85 [2019-12-26 20:51:52,425 INFO L226 Difference]: Without dead ends: 82 [2019-12-26 20:51:52,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1218, Invalid=2564, Unknown=0, NotChecked=0, Total=3782 [2019-12-26 20:51:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-26 20:51:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-12-26 20:51:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-12-26 20:51:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 166 transitions. [2019-12-26 20:51:52,429 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 166 transitions. Word has length 36 [2019-12-26 20:51:52,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:52,429 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 166 transitions. [2019-12-26 20:51:52,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-26 20:51:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 166 transitions. [2019-12-26 20:51:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-26 20:51:52,430 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:52,430 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:52,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:52,634 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:52,635 INFO L82 PathProgramCache]: Analyzing trace with hash 662802534, now seen corresponding path program 57 times [2019-12-26 20:51:52,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:52,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347260237] [2019-12-26 20:51:52,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:53,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347260237] [2019-12-26 20:51:53,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068212848] [2019-12-26 20:51:53,007 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 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 [2019-12-26 20:51:53,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-12-26 20:51:53,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:53,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-26 20:51:53,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:53,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:53,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-26 20:51:53,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744802337] [2019-12-26 20:51:53,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-26 20:51:53,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:53,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-26 20:51:53,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:51:53,120 INFO L87 Difference]: Start difference. First operand 82 states and 166 transitions. Second operand 34 states. [2019-12-26 20:51:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:54,017 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2019-12-26 20:51:54,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-26 20:51:54,017 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2019-12-26 20:51:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:54,018 INFO L225 Difference]: With dead ends: 86 [2019-12-26 20:51:54,018 INFO L226 Difference]: Without dead ends: 83 [2019-12-26 20:51:54,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1298, Invalid=2734, Unknown=0, NotChecked=0, Total=4032 [2019-12-26 20:51:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-26 20:51:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2019-12-26 20:51:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-26 20:51:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 100 transitions. [2019-12-26 20:51:54,022 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 100 transitions. Word has length 37 [2019-12-26 20:51:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:54,023 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 100 transitions. [2019-12-26 20:51:54,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-26 20:51:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 100 transitions. [2019-12-26 20:51:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-26 20:51:54,023 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:54,023 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:54,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:54,227 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:54,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1854355258, now seen corresponding path program 58 times [2019-12-26 20:51:54,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:54,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356875394] [2019-12-26 20:51:54,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:54,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356875394] [2019-12-26 20:51:54,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114641913] [2019-12-26 20:51:54,593 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 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 [2019-12-26 20:51:54,654 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:51:54,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:54,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-26 20:51:54,656 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:54,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:54,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-26 20:51:54,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974055977] [2019-12-26 20:51:54,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-26 20:51:54,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:54,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-26 20:51:54,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2019-12-26 20:51:54,701 INFO L87 Difference]: Start difference. First operand 49 states and 100 transitions. Second operand 34 states. [2019-12-26 20:51:55,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:55,582 INFO L93 Difference]: Finished difference Result 87 states and 176 transitions. [2019-12-26 20:51:55,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-26 20:51:55,583 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2019-12-26 20:51:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:55,584 INFO L225 Difference]: With dead ends: 87 [2019-12-26 20:51:55,584 INFO L226 Difference]: Without dead ends: 84 [2019-12-26 20:51:55,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1325, Invalid=2707, Unknown=0, NotChecked=0, Total=4032 [2019-12-26 20:51:55,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-26 20:51:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-12-26 20:51:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-26 20:51:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2019-12-26 20:51:55,588 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 37 [2019-12-26 20:51:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:55,588 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2019-12-26 20:51:55,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-26 20:51:55,588 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2019-12-26 20:51:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-26 20:51:55,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:55,589 INFO L411 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:55,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:55,793 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:55,793 INFO L82 PathProgramCache]: Analyzing trace with hash -927957869, now seen corresponding path program 59 times [2019-12-26 20:51:55,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:55,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158040054] [2019-12-26 20:51:55,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:56,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158040054] [2019-12-26 20:51:56,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014140202] [2019-12-26 20:51:56,179 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 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 [2019-12-26 20:51:56,251 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-12-26 20:51:56,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:56,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-26 20:51:56,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:56,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:56,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-26 20:51:56,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028324298] [2019-12-26 20:51:56,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-26 20:51:56,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:56,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-26 20:51:56,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2019-12-26 20:51:56,304 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand 35 states. [2019-12-26 20:51:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:57,215 INFO L93 Difference]: Finished difference Result 88 states and 178 transitions. [2019-12-26 20:51:57,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-26 20:51:57,215 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2019-12-26 20:51:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:57,216 INFO L225 Difference]: With dead ends: 88 [2019-12-26 20:51:57,216 INFO L226 Difference]: Without dead ends: 85 [2019-12-26 20:51:57,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1345, Invalid=2815, Unknown=0, NotChecked=0, Total=4160 [2019-12-26 20:51:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-26 20:51:57,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 50. [2019-12-26 20:51:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-26 20:51:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2019-12-26 20:51:57,220 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 38 [2019-12-26 20:51:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:57,220 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2019-12-26 20:51:57,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-26 20:51:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2019-12-26 20:51:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-26 20:51:57,221 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:57,221 INFO L411 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:57,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:57,424 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1650438455, now seen corresponding path program 60 times [2019-12-26 20:51:57,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:57,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315688063] [2019-12-26 20:51:57,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:57,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315688063] [2019-12-26 20:51:57,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350700931] [2019-12-26 20:51:57,785 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:51:57,860 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-12-26 20:51:57,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:51:57,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-26 20:51:57,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:57,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:57,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-26 20:51:57,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553083088] [2019-12-26 20:51:57,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-26 20:51:57,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:57,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-26 20:51:57,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2019-12-26 20:51:57,888 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand 35 states. [2019-12-26 20:51:58,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:51:58,799 INFO L93 Difference]: Finished difference Result 89 states and 180 transitions. [2019-12-26 20:51:58,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-26 20:51:58,800 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2019-12-26 20:51:58,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:51:58,801 INFO L225 Difference]: With dead ends: 89 [2019-12-26 20:51:58,801 INFO L226 Difference]: Without dead ends: 86 [2019-12-26 20:51:58,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1379, Invalid=2911, Unknown=0, NotChecked=0, Total=4290 [2019-12-26 20:51:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-26 20:51:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-12-26 20:51:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-26 20:51:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 174 transitions. [2019-12-26 20:51:58,805 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 174 transitions. Word has length 38 [2019-12-26 20:51:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:51:58,806 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 174 transitions. [2019-12-26 20:51:58,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-26 20:51:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 174 transitions. [2019-12-26 20:51:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-26 20:51:58,806 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:51:58,806 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:51:59,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:51:59,008 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:51:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:51:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1298077438, now seen corresponding path program 61 times [2019-12-26 20:51:59,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:51:59,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500675044] [2019-12-26 20:51:59,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:51:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:59,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500675044] [2019-12-26 20:51:59,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598941411] [2019-12-26 20:51:59,413 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 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 [2019-12-26 20:51:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:51:59,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-26 20:51:59,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:51:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:51:59,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:51:59,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-26 20:51:59,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994401727] [2019-12-26 20:51:59,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-26 20:51:59,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:51:59,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-26 20:51:59,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:51:59,515 INFO L87 Difference]: Start difference. First operand 86 states and 174 transitions. Second operand 36 states. [2019-12-26 20:52:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:00,508 INFO L93 Difference]: Finished difference Result 90 states and 182 transitions. [2019-12-26 20:52:00,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-26 20:52:00,509 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2019-12-26 20:52:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:00,510 INFO L225 Difference]: With dead ends: 90 [2019-12-26 20:52:00,510 INFO L226 Difference]: Without dead ends: 87 [2019-12-26 20:52:00,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2019-12-26 20:52:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-26 20:52:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 51. [2019-12-26 20:52:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-26 20:52:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 104 transitions. [2019-12-26 20:52:00,513 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 104 transitions. Word has length 39 [2019-12-26 20:52:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:00,513 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 104 transitions. [2019-12-26 20:52:00,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-26 20:52:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 104 transitions. [2019-12-26 20:52:00,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-26 20:52:00,514 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:00,514 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:00,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:00,715 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:00,715 INFO L82 PathProgramCache]: Analyzing trace with hash -376015390, now seen corresponding path program 62 times [2019-12-26 20:52:00,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:00,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126220699] [2019-12-26 20:52:00,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:01,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126220699] [2019-12-26 20:52:01,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424476702] [2019-12-26 20:52:01,080 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 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 [2019-12-26 20:52:01,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:52:01,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:01,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-26 20:52:01,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:01,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:01,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-26 20:52:01,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824834023] [2019-12-26 20:52:01,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-26 20:52:01,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:01,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-26 20:52:01,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2019-12-26 20:52:01,192 INFO L87 Difference]: Start difference. First operand 51 states and 104 transitions. Second operand 36 states. [2019-12-26 20:52:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:02,131 INFO L93 Difference]: Finished difference Result 91 states and 184 transitions. [2019-12-26 20:52:02,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-26 20:52:02,132 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2019-12-26 20:52:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:02,133 INFO L225 Difference]: With dead ends: 91 [2019-12-26 20:52:02,133 INFO L226 Difference]: Without dead ends: 88 [2019-12-26 20:52:02,134 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1493, Invalid=3063, Unknown=0, NotChecked=0, Total=4556 [2019-12-26 20:52:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-26 20:52:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-12-26 20:52:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-26 20:52:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 178 transitions. [2019-12-26 20:52:02,136 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 178 transitions. Word has length 39 [2019-12-26 20:52:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:02,137 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 178 transitions. [2019-12-26 20:52:02,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-26 20:52:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 178 transitions. [2019-12-26 20:52:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-26 20:52:02,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:02,138 INFO L411 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:02,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:02,339 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:02,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1585694971, now seen corresponding path program 63 times [2019-12-26 20:52:02,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:02,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83366772] [2019-12-26 20:52:02,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:03,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83366772] [2019-12-26 20:52:03,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720201442] [2019-12-26 20:52:03,011 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 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 [2019-12-26 20:52:03,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-12-26 20:52:03,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:03,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-26 20:52:03,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:03,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:03,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-26 20:52:03,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4653011] [2019-12-26 20:52:03,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-26 20:52:03,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:03,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-26 20:52:03,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:52:03,207 INFO L87 Difference]: Start difference. First operand 88 states and 178 transitions. Second operand 37 states. [2019-12-26 20:52:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:04,194 INFO L93 Difference]: Finished difference Result 92 states and 186 transitions. [2019-12-26 20:52:04,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-26 20:52:04,195 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2019-12-26 20:52:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:04,196 INFO L225 Difference]: With dead ends: 92 [2019-12-26 20:52:04,196 INFO L226 Difference]: Without dead ends: 89 [2019-12-26 20:52:04,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1514, Invalid=3178, Unknown=0, NotChecked=0, Total=4692 [2019-12-26 20:52:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-26 20:52:04,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 52. [2019-12-26 20:52:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-26 20:52:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-26 20:52:04,199 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 40 [2019-12-26 20:52:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:04,199 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-26 20:52:04,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-26 20:52:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-26 20:52:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-26 20:52:04,200 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:04,200 INFO L411 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:04,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:04,402 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:04,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1228425103, now seen corresponding path program 64 times [2019-12-26 20:52:04,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:04,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049721263] [2019-12-26 20:52:04,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:04,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049721263] [2019-12-26 20:52:04,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585004471] [2019-12-26 20:52:04,820 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-26 20:52:04,883 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:52:04,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:04,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-26 20:52:04,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:04,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:04,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-26 20:52:04,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409055322] [2019-12-26 20:52:04,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-26 20:52:04,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:04,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-26 20:52:04,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2019-12-26 20:52:04,915 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 37 states. [2019-12-26 20:52:05,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:05,907 INFO L93 Difference]: Finished difference Result 93 states and 188 transitions. [2019-12-26 20:52:05,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-26 20:52:05,907 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2019-12-26 20:52:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:05,908 INFO L225 Difference]: With dead ends: 93 [2019-12-26 20:52:05,908 INFO L226 Difference]: Without dead ends: 90 [2019-12-26 20:52:05,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1550, Invalid=3280, Unknown=0, NotChecked=0, Total=4830 [2019-12-26 20:52:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-26 20:52:05,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-12-26 20:52:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-26 20:52:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 182 transitions. [2019-12-26 20:52:05,912 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 182 transitions. Word has length 40 [2019-12-26 20:52:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:05,912 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 182 transitions. [2019-12-26 20:52:05,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-26 20:52:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 182 transitions. [2019-12-26 20:52:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-26 20:52:05,913 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:05,913 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:06,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:06,117 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:06,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:06,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1911904150, now seen corresponding path program 65 times [2019-12-26 20:52:06,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:06,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473290557] [2019-12-26 20:52:06,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:06,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473290557] [2019-12-26 20:52:06,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778098220] [2019-12-26 20:52:06,832 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 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 [2019-12-26 20:52:06,960 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-12-26 20:52:06,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:06,963 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-26 20:52:06,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:07,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:07,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-26 20:52:07,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628942143] [2019-12-26 20:52:07,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-26 20:52:07,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:07,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-26 20:52:07,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2019-12-26 20:52:07,033 INFO L87 Difference]: Start difference. First operand 90 states and 182 transitions. Second operand 38 states. [2019-12-26 20:52:08,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:08,278 INFO L93 Difference]: Finished difference Result 94 states and 190 transitions. [2019-12-26 20:52:08,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-26 20:52:08,278 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2019-12-26 20:52:08,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:08,279 INFO L225 Difference]: With dead ends: 94 [2019-12-26 20:52:08,279 INFO L226 Difference]: Without dead ends: 91 [2019-12-26 20:52:08,280 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1640, Invalid=3472, Unknown=0, NotChecked=0, Total=5112 [2019-12-26 20:52:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-26 20:52:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 53. [2019-12-26 20:52:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-26 20:52:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2019-12-26 20:52:08,283 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 41 [2019-12-26 20:52:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:08,284 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2019-12-26 20:52:08,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-26 20:52:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2019-12-26 20:52:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-26 20:52:08,284 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:08,284 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:08,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:08,488 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash -573527414, now seen corresponding path program 66 times [2019-12-26 20:52:08,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:08,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774395076] [2019-12-26 20:52:08,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:08,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774395076] [2019-12-26 20:52:08,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029485062] [2019-12-26 20:52:08,924 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 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 [2019-12-26 20:52:08,999 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-12-26 20:52:09,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:09,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-26 20:52:09,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:09,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:09,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-26 20:52:09,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865350320] [2019-12-26 20:52:09,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-26 20:52:09,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:09,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-26 20:52:09,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2019-12-26 20:52:09,038 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 38 states. [2019-12-26 20:52:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:10,082 INFO L93 Difference]: Finished difference Result 95 states and 192 transitions. [2019-12-26 20:52:10,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-26 20:52:10,083 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2019-12-26 20:52:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:10,084 INFO L225 Difference]: With dead ends: 95 [2019-12-26 20:52:10,084 INFO L226 Difference]: Without dead ends: 92 [2019-12-26 20:52:10,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1671, Invalid=3441, Unknown=0, NotChecked=0, Total=5112 [2019-12-26 20:52:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-26 20:52:10,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-12-26 20:52:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-26 20:52:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 186 transitions. [2019-12-26 20:52:10,088 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 186 transitions. Word has length 41 [2019-12-26 20:52:10,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:10,088 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 186 transitions. [2019-12-26 20:52:10,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-26 20:52:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 186 transitions. [2019-12-26 20:52:10,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-26 20:52:10,089 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:10,089 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:10,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:10,293 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash -860513437, now seen corresponding path program 67 times [2019-12-26 20:52:10,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:10,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793298481] [2019-12-26 20:52:10,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:11,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793298481] [2019-12-26 20:52:11,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903045207] [2019-12-26 20:52:11,185 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 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 [2019-12-26 20:52:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:11,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-26 20:52:11,259 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:11,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:11,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-26 20:52:11,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597409968] [2019-12-26 20:52:11,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-26 20:52:11,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:11,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-26 20:52:11,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2019-12-26 20:52:11,286 INFO L87 Difference]: Start difference. First operand 92 states and 186 transitions. Second operand 39 states. [2019-12-26 20:52:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:12,385 INFO L93 Difference]: Finished difference Result 96 states and 194 transitions. [2019-12-26 20:52:12,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-26 20:52:12,385 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2019-12-26 20:52:12,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:12,386 INFO L225 Difference]: With dead ends: 96 [2019-12-26 20:52:12,386 INFO L226 Difference]: Without dead ends: 93 [2019-12-26 20:52:12,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1693, Invalid=3563, Unknown=0, NotChecked=0, Total=5256 [2019-12-26 20:52:12,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-12-26 20:52:12,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2019-12-26 20:52:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-26 20:52:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2019-12-26 20:52:12,390 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 42 [2019-12-26 20:52:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:12,390 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2019-12-26 20:52:12,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-26 20:52:12,391 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2019-12-26 20:52:12,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-26 20:52:12,391 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:12,391 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:12,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:12,595 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:12,595 INFO L82 PathProgramCache]: Analyzing trace with hash -599480345, now seen corresponding path program 68 times [2019-12-26 20:52:12,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:12,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264046147] [2019-12-26 20:52:12,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:13,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264046147] [2019-12-26 20:52:13,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015222181] [2019-12-26 20:52:13,045 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 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 [2019-12-26 20:52:13,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:52:13,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:13,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-26 20:52:13,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:13,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:13,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-26 20:52:13,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336897082] [2019-12-26 20:52:13,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-26 20:52:13,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-26 20:52:13,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2019-12-26 20:52:13,142 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand 39 states. [2019-12-26 20:52:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:14,158 INFO L93 Difference]: Finished difference Result 97 states and 196 transitions. [2019-12-26 20:52:14,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-26 20:52:14,159 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2019-12-26 20:52:14,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:14,160 INFO L225 Difference]: With dead ends: 97 [2019-12-26 20:52:14,160 INFO L226 Difference]: Without dead ends: 94 [2019-12-26 20:52:14,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1594, Invalid=3808, Unknown=0, NotChecked=0, Total=5402 [2019-12-26 20:52:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-26 20:52:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-12-26 20:52:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-26 20:52:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 190 transitions. [2019-12-26 20:52:14,164 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 190 transitions. Word has length 42 [2019-12-26 20:52:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:14,164 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 190 transitions. [2019-12-26 20:52:14,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-26 20:52:14,164 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 190 transitions. [2019-12-26 20:52:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-26 20:52:14,165 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:14,165 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:14,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:14,369 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:14,369 INFO L82 PathProgramCache]: Analyzing trace with hash -906112466, now seen corresponding path program 69 times [2019-12-26 20:52:14,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:14,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050032041] [2019-12-26 20:52:14,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:14,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050032041] [2019-12-26 20:52:14,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911143566] [2019-12-26 20:52:14,848 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 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 [2019-12-26 20:52:14,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-12-26 20:52:14,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:14,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-26 20:52:14,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:14,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:14,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-26 20:52:14,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671709187] [2019-12-26 20:52:14,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-26 20:52:14,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:14,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-26 20:52:14,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2019-12-26 20:52:14,957 INFO L87 Difference]: Start difference. First operand 94 states and 190 transitions. Second operand 40 states. [2019-12-26 20:52:16,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:16,140 INFO L93 Difference]: Finished difference Result 98 states and 198 transitions. [2019-12-26 20:52:16,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-26 20:52:16,140 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2019-12-26 20:52:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:16,141 INFO L225 Difference]: With dead ends: 98 [2019-12-26 20:52:16,141 INFO L226 Difference]: Without dead ends: 95 [2019-12-26 20:52:16,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1826, Invalid=3874, Unknown=0, NotChecked=0, Total=5700 [2019-12-26 20:52:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-12-26 20:52:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 55. [2019-12-26 20:52:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-26 20:52:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 112 transitions. [2019-12-26 20:52:16,145 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 112 transitions. Word has length 43 [2019-12-26 20:52:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:16,145 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 112 transitions. [2019-12-26 20:52:16,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-26 20:52:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 112 transitions. [2019-12-26 20:52:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-26 20:52:16,145 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:16,145 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:16,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:16,346 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:16,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1404021454, now seen corresponding path program 70 times [2019-12-26 20:52:16,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:16,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902543274] [2019-12-26 20:52:16,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:16,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902543274] [2019-12-26 20:52:16,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569569044] [2019-12-26 20:52:16,836 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 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 [2019-12-26 20:52:16,899 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:52:16,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:16,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-26 20:52:16,901 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:16,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:16,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-26 20:52:16,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889219499] [2019-12-26 20:52:16,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-26 20:52:16,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:16,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-26 20:52:16,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2019-12-26 20:52:16,933 INFO L87 Difference]: Start difference. First operand 55 states and 112 transitions. Second operand 40 states. [2019-12-26 20:52:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:18,061 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2019-12-26 20:52:18,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-26 20:52:18,061 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2019-12-26 20:52:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:18,062 INFO L225 Difference]: With dead ends: 99 [2019-12-26 20:52:18,063 INFO L226 Difference]: Without dead ends: 96 [2019-12-26 20:52:18,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1859, Invalid=3841, Unknown=0, NotChecked=0, Total=5700 [2019-12-26 20:52:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-26 20:52:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-12-26 20:52:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-26 20:52:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 194 transitions. [2019-12-26 20:52:18,065 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 194 transitions. Word has length 43 [2019-12-26 20:52:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:18,065 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 194 transitions. [2019-12-26 20:52:18,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-26 20:52:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 194 transitions. [2019-12-26 20:52:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-26 20:52:18,066 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:18,066 INFO L411 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:18,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:18,267 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:18,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:18,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1975284683, now seen corresponding path program 71 times [2019-12-26 20:52:18,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:18,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051207048] [2019-12-26 20:52:18,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:18,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051207048] [2019-12-26 20:52:18,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106069010] [2019-12-26 20:52:18,754 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 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 [2019-12-26 20:52:18,832 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-12-26 20:52:18,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:18,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-26 20:52:18,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:18,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:18,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-26 20:52:18,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143510879] [2019-12-26 20:52:18,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-26 20:52:18,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:18,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-26 20:52:18,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2019-12-26 20:52:18,866 INFO L87 Difference]: Start difference. First operand 96 states and 194 transitions. Second operand 41 states. [2019-12-26 20:52:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:20,081 INFO L93 Difference]: Finished difference Result 100 states and 202 transitions. [2019-12-26 20:52:20,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-26 20:52:20,082 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2019-12-26 20:52:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:20,083 INFO L225 Difference]: With dead ends: 100 [2019-12-26 20:52:20,083 INFO L226 Difference]: Without dead ends: 97 [2019-12-26 20:52:20,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1882, Invalid=3970, Unknown=0, NotChecked=0, Total=5852 [2019-12-26 20:52:20,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-26 20:52:20,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 56. [2019-12-26 20:52:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-26 20:52:20,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2019-12-26 20:52:20,087 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 44 [2019-12-26 20:52:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:20,087 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2019-12-26 20:52:20,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-26 20:52:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2019-12-26 20:52:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-26 20:52:20,088 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:20,088 INFO L411 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:20,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:20,291 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:20,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:20,292 INFO L82 PathProgramCache]: Analyzing trace with hash -574991809, now seen corresponding path program 72 times [2019-12-26 20:52:20,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:20,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331620723] [2019-12-26 20:52:20,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:20,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331620723] [2019-12-26 20:52:20,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886839001] [2019-12-26 20:52:20,780 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 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 [2019-12-26 20:52:20,866 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-12-26 20:52:20,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:20,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-26 20:52:20,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:20,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:20,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-26 20:52:20,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377260594] [2019-12-26 20:52:20,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-26 20:52:20,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:20,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-26 20:52:20,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2019-12-26 20:52:20,909 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand 41 states. [2019-12-26 20:52:22,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:22,486 INFO L93 Difference]: Finished difference Result 101 states and 204 transitions. [2019-12-26 20:52:22,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-26 20:52:22,486 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2019-12-26 20:52:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:22,487 INFO L225 Difference]: With dead ends: 101 [2019-12-26 20:52:22,487 INFO L226 Difference]: Without dead ends: 98 [2019-12-26 20:52:22,487 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1768, Invalid=4238, Unknown=0, NotChecked=0, Total=6006 [2019-12-26 20:52:22,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-12-26 20:52:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-12-26 20:52:22,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-26 20:52:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2019-12-26 20:52:22,489 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 44 [2019-12-26 20:52:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:22,489 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2019-12-26 20:52:22,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-26 20:52:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2019-12-26 20:52:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-26 20:52:22,491 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:22,491 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:22,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:22,695 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:22,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:22,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1104283334, now seen corresponding path program 73 times [2019-12-26 20:52:22,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:22,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746533722] [2019-12-26 20:52:22,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:23,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746533722] [2019-12-26 20:52:23,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001685275] [2019-12-26 20:52:23,228 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 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 [2019-12-26 20:52:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:23,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-26 20:52:23,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:23,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:23,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-26 20:52:23,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906484676] [2019-12-26 20:52:23,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-26 20:52:23,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:23,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-26 20:52:23,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2019-12-26 20:52:23,342 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand 42 states. [2019-12-26 20:52:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:24,619 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2019-12-26 20:52:24,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-26 20:52:24,620 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2019-12-26 20:52:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:24,621 INFO L225 Difference]: With dead ends: 102 [2019-12-26 20:52:24,621 INFO L226 Difference]: Without dead ends: 99 [2019-12-26 20:52:24,622 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2022, Invalid=4298, Unknown=0, NotChecked=0, Total=6320 [2019-12-26 20:52:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-12-26 20:52:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 57. [2019-12-26 20:52:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-26 20:52:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 116 transitions. [2019-12-26 20:52:24,624 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 116 transitions. Word has length 45 [2019-12-26 20:52:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:24,625 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 116 transitions. [2019-12-26 20:52:24,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-26 20:52:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 116 transitions. [2019-12-26 20:52:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-26 20:52:24,625 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:24,625 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:24,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:24,827 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:24,828 INFO L82 PathProgramCache]: Analyzing trace with hash -644876838, now seen corresponding path program 74 times [2019-12-26 20:52:24,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:24,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159100743] [2019-12-26 20:52:24,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:25,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159100743] [2019-12-26 20:52:25,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46167446] [2019-12-26 20:52:25,365 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 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 [2019-12-26 20:52:25,440 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:52:25,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:25,441 INFO L264 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-26 20:52:25,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:25,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:25,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-26 20:52:25,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742316078] [2019-12-26 20:52:25,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-26 20:52:25,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:25,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-26 20:52:25,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2019-12-26 20:52:25,497 INFO L87 Difference]: Start difference. First operand 57 states and 116 transitions. Second operand 42 states. [2019-12-26 20:52:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:26,735 INFO L93 Difference]: Finished difference Result 103 states and 208 transitions. [2019-12-26 20:52:26,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-26 20:52:26,736 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2019-12-26 20:52:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:26,737 INFO L225 Difference]: With dead ends: 103 [2019-12-26 20:52:26,737 INFO L226 Difference]: Without dead ends: 100 [2019-12-26 20:52:26,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2057, Invalid=4263, Unknown=0, NotChecked=0, Total=6320 [2019-12-26 20:52:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-26 20:52:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-12-26 20:52:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-26 20:52:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 202 transitions. [2019-12-26 20:52:26,740 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 202 transitions. Word has length 45 [2019-12-26 20:52:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:26,741 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 202 transitions. [2019-12-26 20:52:26,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-26 20:52:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 202 transitions. [2019-12-26 20:52:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-26 20:52:26,741 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:26,741 INFO L411 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:26,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:26,942 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:26,943 INFO L82 PathProgramCache]: Analyzing trace with hash -126954957, now seen corresponding path program 75 times [2019-12-26 20:52:26,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:26,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115766020] [2019-12-26 20:52:26,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:27,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115766020] [2019-12-26 20:52:27,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269548388] [2019-12-26 20:52:27,460 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 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 [2019-12-26 20:52:27,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-12-26 20:52:27,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:27,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-26 20:52:27,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:27,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:27,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-26 20:52:27,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784800543] [2019-12-26 20:52:27,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-26 20:52:27,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:27,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-26 20:52:27,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2019-12-26 20:52:27,585 INFO L87 Difference]: Start difference. First operand 100 states and 202 transitions. Second operand 43 states. [2019-12-26 20:52:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:28,886 INFO L93 Difference]: Finished difference Result 104 states and 210 transitions. [2019-12-26 20:52:28,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-26 20:52:28,886 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2019-12-26 20:52:28,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:28,887 INFO L225 Difference]: With dead ends: 104 [2019-12-26 20:52:28,888 INFO L226 Difference]: Without dead ends: 101 [2019-12-26 20:52:28,888 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2081, Invalid=4399, Unknown=0, NotChecked=0, Total=6480 [2019-12-26 20:52:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-26 20:52:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 58. [2019-12-26 20:52:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-26 20:52:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2019-12-26 20:52:28,891 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 46 [2019-12-26 20:52:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:28,891 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2019-12-26 20:52:28,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-26 20:52:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2019-12-26 20:52:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-26 20:52:28,891 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:28,891 INFO L411 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:29,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:29,092 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1483654807, now seen corresponding path program 76 times [2019-12-26 20:52:29,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:29,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244544284] [2019-12-26 20:52:29,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:29,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244544284] [2019-12-26 20:52:29,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947547999] [2019-12-26 20:52:29,625 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 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 [2019-12-26 20:52:29,697 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-26 20:52:29,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:29,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-26 20:52:29,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:29,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:29,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-26 20:52:29,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312192073] [2019-12-26 20:52:29,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-26 20:52:29,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:29,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-26 20:52:29,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2019-12-26 20:52:29,734 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand 43 states. [2019-12-26 20:52:31,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:31,036 INFO L93 Difference]: Finished difference Result 105 states and 212 transitions. [2019-12-26 20:52:31,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-26 20:52:31,037 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2019-12-26 20:52:31,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:31,038 INFO L225 Difference]: With dead ends: 105 [2019-12-26 20:52:31,038 INFO L226 Difference]: Without dead ends: 102 [2019-12-26 20:52:31,039 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2123, Invalid=4519, Unknown=0, NotChecked=0, Total=6642 [2019-12-26 20:52:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-26 20:52:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-12-26 20:52:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-26 20:52:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 206 transitions. [2019-12-26 20:52:31,042 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 206 transitions. Word has length 46 [2019-12-26 20:52:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:31,042 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 206 transitions. [2019-12-26 20:52:31,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-26 20:52:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 206 transitions. [2019-12-26 20:52:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-26 20:52:31,043 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:31,043 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:31,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:31,246 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:31,247 INFO L82 PathProgramCache]: Analyzing trace with hash 359363934, now seen corresponding path program 77 times [2019-12-26 20:52:31,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:31,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981956770] [2019-12-26 20:52:31,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:31,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981956770] [2019-12-26 20:52:31,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712812252] [2019-12-26 20:52:31,809 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 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 [2019-12-26 20:52:31,899 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-12-26 20:52:31,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:31,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-26 20:52:31,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:31,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:31,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-26 20:52:31,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533824643] [2019-12-26 20:52:31,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-26 20:52:31,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-26 20:52:31,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1424, Unknown=0, NotChecked=0, Total=1892 [2019-12-26 20:52:31,940 INFO L87 Difference]: Start difference. First operand 102 states and 206 transitions. Second operand 44 states. [2019-12-26 20:52:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:33,301 INFO L93 Difference]: Finished difference Result 106 states and 214 transitions. [2019-12-26 20:52:33,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-26 20:52:33,301 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2019-12-26 20:52:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:33,302 INFO L225 Difference]: With dead ends: 106 [2019-12-26 20:52:33,302 INFO L226 Difference]: Without dead ends: 103 [2019-12-26 20:52:33,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2228, Invalid=4744, Unknown=0, NotChecked=0, Total=6972 [2019-12-26 20:52:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-26 20:52:33,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 59. [2019-12-26 20:52:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-26 20:52:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 120 transitions. [2019-12-26 20:52:33,306 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 120 transitions. Word has length 47 [2019-12-26 20:52:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:33,306 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 120 transitions. [2019-12-26 20:52:33,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-26 20:52:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 120 transitions. [2019-12-26 20:52:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-26 20:52:33,307 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:33,307 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:33,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:33,510 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:33,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:33,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1251341182, now seen corresponding path program 78 times [2019-12-26 20:52:33,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:33,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891465924] [2019-12-26 20:52:33,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:34,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891465924] [2019-12-26 20:52:34,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762896728] [2019-12-26 20:52:34,050 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 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 [2019-12-26 20:52:34,154 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-12-26 20:52:34,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:34,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-26 20:52:34,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:34,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-26 20:52:34,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-26 20:52:34,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683353131] [2019-12-26 20:52:34,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-26 20:52:34,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:34,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-26 20:52:34,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1424, Unknown=0, NotChecked=0, Total=1892 [2019-12-26 20:52:34,203 INFO L87 Difference]: Start difference. First operand 59 states and 120 transitions. Second operand 44 states. [2019-12-26 20:52:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:35,525 INFO L93 Difference]: Finished difference Result 107 states and 216 transitions. [2019-12-26 20:52:35,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-26 20:52:35,526 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2019-12-26 20:52:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:35,527 INFO L225 Difference]: With dead ends: 107 [2019-12-26 20:52:35,527 INFO L226 Difference]: Without dead ends: 104 [2019-12-26 20:52:35,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2265, Invalid=4707, Unknown=0, NotChecked=0, Total=6972 [2019-12-26 20:52:35,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-26 20:52:35,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-12-26 20:52:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-26 20:52:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2019-12-26 20:52:35,530 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 47 [2019-12-26 20:52:35,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:35,530 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2019-12-26 20:52:35,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-26 20:52:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2019-12-26 20:52:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-26 20:52:35,531 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:35,531 INFO L411 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:35,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:35,732 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:35,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1744619877, now seen corresponding path program 79 times [2019-12-26 20:52:35,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:35,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754453950] [2019-12-26 20:52:35,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:36,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754453950] [2019-12-26 20:52:36,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119861785] [2019-12-26 20:52:36,021 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 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 [2019-12-26 20:52:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:36,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-26 20:52:36,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:36,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-26 20:52:36,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2019-12-26 20:52:36,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961115108] [2019-12-26 20:52:36,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-26 20:52:36,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:36,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-26 20:52:36,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:52:36,110 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand 23 states. [2019-12-26 20:52:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:36,152 INFO L93 Difference]: Finished difference Result 921 states and 1757 transitions. [2019-12-26 20:52:36,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:52:36,152 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-12-26 20:52:36,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:36,153 INFO L225 Difference]: With dead ends: 921 [2019-12-26 20:52:36,153 INFO L226 Difference]: Without dead ends: 60 [2019-12-26 20:52:36,153 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2019-12-26 20:52:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-26 20:52:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-26 20:52:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-26 20:52:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 94 transitions. [2019-12-26 20:52:36,154 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 94 transitions. Word has length 48 [2019-12-26 20:52:36,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:36,154 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 94 transitions. [2019-12-26 20:52:36,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-26 20:52:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 94 transitions. [2019-12-26 20:52:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-26 20:52:36,155 INFO L403 BasicCegarLoop]: Found error trace [2019-12-26 20:52:36,155 INFO L411 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-26 20:52:36,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:36,356 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-26 20:52:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-26 20:52:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash -136870673, now seen corresponding path program 80 times [2019-12-26 20:52:36,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-26 20:52:36,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993792538] [2019-12-26 20:52:36,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-26 20:52:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-26 20:52:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:37,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993792538] [2019-12-26 20:52:37,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539630957] [2019-12-26 20:52:37,143 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 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 [2019-12-26 20:52:37,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-26 20:52:37,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-26 20:52:37,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-26 20:52:37,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-26 20:52:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-26 20:52:37,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-26 20:52:37,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [42] total 65 [2019-12-26 20:52:37,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525755115] [2019-12-26 20:52:37,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-26 20:52:37,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-26 20:52:37,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-26 20:52:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=3422, Unknown=0, NotChecked=0, Total=4160 [2019-12-26 20:52:37,863 INFO L87 Difference]: Start difference. First operand 60 states and 94 transitions. Second operand 23 states. [2019-12-26 20:52:37,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-26 20:52:37,928 INFO L93 Difference]: Finished difference Result 451 states and 644 transitions. [2019-12-26 20:52:37,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-26 20:52:37,929 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-12-26 20:52:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-26 20:52:37,929 INFO L225 Difference]: With dead ends: 451 [2019-12-26 20:52:37,930 INFO L226 Difference]: Without dead ends: 0 [2019-12-26 20:52:37,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=738, Invalid=3422, Unknown=0, NotChecked=0, Total=4160 [2019-12-26 20:52:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-26 20:52:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-26 20:52:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-26 20:52:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-26 20:52:37,931 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2019-12-26 20:52:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-26 20:52:37,932 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-26 20:52:37,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-26 20:52:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-26 20:52:37,932 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-26 20:52:38,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-26 20:52:38,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.12 08:52:38 BasicIcfg [2019-12-26 20:52:38,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-26 20:52:38,142 INFO L168 Benchmark]: Toolchain (without parser) took 99008.19 ms. Allocated memory was 137.4 MB in the beginning and 542.6 MB in the end (delta: 405.3 MB). Free memory was 100.6 MB in the beginning and 260.1 MB in the end (delta: -159.5 MB). Peak memory consumption was 245.8 MB. Max. memory is 7.1 GB. [2019-12-26 20:52:38,143 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-12-26 20:52:38,143 INFO L168 Benchmark]: CACSL2BoogieTranslator took 710.47 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 100.4 MB in the beginning and 160.9 MB in the end (delta: -60.5 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2019-12-26 20:52:38,144 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.72 ms. Allocated memory is still 201.9 MB. Free memory was 160.9 MB in the beginning and 158.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-26 20:52:38,144 INFO L168 Benchmark]: Boogie Preprocessor took 28.69 ms. Allocated memory is still 201.9 MB. Free memory was 158.9 MB in the beginning and 157.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-26 20:52:38,144 INFO L168 Benchmark]: RCFGBuilder took 415.52 ms. Allocated memory is still 201.9 MB. Free memory was 157.6 MB in the beginning and 138.2 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2019-12-26 20:52:38,145 INFO L168 Benchmark]: TraceAbstraction took 97803.15 ms. Allocated memory was 201.9 MB in the beginning and 542.6 MB in the end (delta: 340.8 MB). Free memory was 137.5 MB in the beginning and 260.1 MB in the end (delta: -122.6 MB). Peak memory consumption was 218.2 MB. Max. memory is 7.1 GB. [2019-12-26 20:52:38,147 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 710.47 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 100.4 MB in the beginning and 160.9 MB in the end (delta: -60.5 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.72 ms. Allocated memory is still 201.9 MB. Free memory was 160.9 MB in the beginning and 158.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.69 ms. Allocated memory is still 201.9 MB. Free memory was 158.9 MB in the beginning and 157.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 415.52 ms. Allocated memory is still 201.9 MB. Free memory was 157.6 MB in the beginning and 138.2 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 97803.15 ms. Allocated memory was 201.9 MB in the beginning and 542.6 MB in the end (delta: 340.8 MB). Free memory was 137.5 MB in the beginning and 260.1 MB in the end (delta: -122.6 MB). Peak memory consumption was 218.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 53 ProgramPointsBefore, 16 ProgramPointsAfterwards, 51 TransitionsBefore, 14 TransitionsAfterwards, 740 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 380 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 604 CheckedPairsTotal, 41 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 97.6s, OverallIterations: 82, TraceHistogramMax: 21, AutomataDifference: 48.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1025 SDtfs, 2947 SDslu, 3699 SDs, 0 SdLazy, 5469 SolverSat, 6346 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5585 GetRequests, 2088 SyntacticMatches, 0 SemanticMatches, 3497 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36284 ImplicationChecksByTransitivity, 60.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 82 MinimizatonAttempts, 975 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 24.8s InterpolantComputationTime, 4554 NumberOfCodeBlocks, 4554 NumberOfCodeBlocksAsserted, 579 NumberOfCheckSat, 4394 ConstructedInterpolants, 0 QuantifiedInterpolants, 446468 SizeOfPredicates, 1558 NumberOfNonLiveVariables, 13572 ConjunctsInSsa, 1985 ConjunctsInUnsatCore, 160 InterpolantComputations, 6 PerfectInterpolantSequences, 1180/22120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...