/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 19:16:17,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 19:16:17,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 19:16:17,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 19:16:17,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 19:16:17,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 19:16:17,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 19:16:17,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 19:16:17,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 19:16:17,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 19:16:17,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 19:16:17,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 19:16:17,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 19:16:17,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 19:16:17,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 19:16:17,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 19:16:17,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 19:16:17,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 19:16:17,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 19:16:17,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 19:16:17,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 19:16:17,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 19:16:17,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 19:16:17,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 19:16:17,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 19:16:17,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 19:16:17,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 19:16:17,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 19:16:17,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 19:16:17,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 19:16:17,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 19:16:17,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 19:16:17,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 19:16:17,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 19:16:17,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 19:16:17,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 19:16:17,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 19:16:17,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 19:16:17,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 19:16:17,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 19:16:17,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 19:16:17,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-MCR.epf [2019-12-27 19:16:17,865 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 19:16:17,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 19:16:17,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 19:16:17,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 19:16:17,870 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 19:16:17,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 19:16:17,871 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 19:16:17,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 19:16:17,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 19:16:17,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 19:16:17,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 19:16:17,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 19:16:17,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 19:16:17,873 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 19:16:17,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 19:16:17,874 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 19:16:17,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 19:16:17,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 19:16:17,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 19:16:17,874 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 19:16:17,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 19:16:17,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 19:16:17,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 19:16:17,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 19:16:17,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 19:16:17,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 19:16:17,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 19:16:17,878 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 19:16:17,878 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 19:16:17,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 19:16:17,879 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 19:16:17,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 19:16:18,153 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 19:16:18,173 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 19:16:18,176 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 19:16:18,177 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 19:16:18,178 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 19:16:18,179 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2019-12-27 19:16:18,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27a77ef8a/1dcf31808d0d4e53a70f9e9b3b839539/FLAGd92e058d8 [2019-12-27 19:16:18,775 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 19:16:18,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2019-12-27 19:16:18,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27a77ef8a/1dcf31808d0d4e53a70f9e9b3b839539/FLAGd92e058d8 [2019-12-27 19:16:19,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27a77ef8a/1dcf31808d0d4e53a70f9e9b3b839539 [2019-12-27 19:16:19,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 19:16:19,116 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 19:16:19,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 19:16:19,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 19:16:19,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 19:16:19,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cb0dce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19, skipping insertion in model container [2019-12-27 19:16:19,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 19:16:19,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 19:16:19,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:16:19,640 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 19:16:19,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:16:19,756 INFO L208 MainTranslator]: Completed translation [2019-12-27 19:16:19,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19 WrapperNode [2019-12-27 19:16:19,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 19:16:19,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 19:16:19,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 19:16:19,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 19:16:19,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 19:16:19,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 19:16:19,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 19:16:19,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 19:16:19,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19" (1/1) ... [2019-12-27 19:16:19,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 19:16:19,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 19:16:19,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 19:16:19,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 19:16:19,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19" (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 [2019-12-27 19:16:19,889 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 19:16:19,890 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 19:16:19,890 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 19:16:19,890 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 19:16:19,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 19:16:19,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 19:16:19,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 19:16:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 19:16:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 19:16:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 19:16:19,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 19:16:19,893 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 19:16:20,223 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 19:16:20,224 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 19:16:20,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:16:20 BoogieIcfgContainer [2019-12-27 19:16:20,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 19:16:20,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 19:16:20,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 19:16:20,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 19:16:20,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 07:16:19" (1/3) ... [2019-12-27 19:16:20,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6877a4f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:16:20, skipping insertion in model container [2019-12-27 19:16:20,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:19" (2/3) ... [2019-12-27 19:16:20,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6877a4f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:16:20, skipping insertion in model container [2019-12-27 19:16:20,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:16:20" (3/3) ... [2019-12-27 19:16:20,233 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2019-12-27 19:16:20,242 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 19:16:20,243 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 19:16:20,249 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 19:16:20,251 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 19:16:20,275 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,275 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,276 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,276 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,276 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,277 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,277 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,277 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,278 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,278 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,278 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,278 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,279 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,279 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,279 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,280 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,280 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,280 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,280 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,281 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,281 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,281 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,282 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,282 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,282 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,283 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,283 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,283 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,283 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,284 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,288 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,288 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,288 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,288 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,289 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,289 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,294 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,295 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,295 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,295 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,295 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,296 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:20,313 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 19:16:20,328 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 19:16:20,329 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 19:16:20,329 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 19:16:20,329 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 19:16:20,329 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 19:16:20,329 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 19:16:20,330 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 19:16:20,330 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 19:16:20,343 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 19:16:20,345 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 19:16:20,393 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 19:16:20,393 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 19:16:20,401 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 19:16:20,405 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 19:16:20,424 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 19:16:20,425 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 19:16:20,427 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 19:16:20,429 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 19:16:20,430 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 19:16:21,575 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 19:16:21,703 INFO L206 etLargeBlockEncoding]: Checked pairs total: 695 [2019-12-27 19:16:21,703 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 19:16:21,709 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 19:16:21,722 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 19:16:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 19:16:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 19:16:21,731 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:21,732 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 19:16:21,733 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:21,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:21,740 INFO L82 PathProgramCache]: Analyzing trace with hash 213401609, now seen corresponding path program 1 times [2019-12-27 19:16:21,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:21,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828403821] [2019-12-27 19:16:21,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:22,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828403821] [2019-12-27 19:16:22,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:16:22,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 19:16:22,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [901367670] [2019-12-27 19:16:22,080 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:22,087 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:22,101 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 6 states and 5 transitions. [2019-12-27 19:16:22,102 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:22,107 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:22,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 19:16:22,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:22,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 19:16:22,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 19:16:22,127 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 19:16:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:22,162 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 19:16:22,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 19:16:22,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 19:16:22,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:22,188 INFO L225 Difference]: With dead ends: 54 [2019-12-27 19:16:22,189 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 19:16:22,192 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 [2019-12-27 19:16:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 19:16:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 19:16:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 19:16:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 19:16:22,233 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 19:16:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:22,233 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 19:16:22,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 19:16:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 19:16:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 19:16:22,234 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:22,234 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:22,235 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:22,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1054417208, now seen corresponding path program 1 times [2019-12-27 19:16:22,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:22,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239282294] [2019-12-27 19:16:22,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:22,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239282294] [2019-12-27 19:16:22,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:16:22,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 19:16:22,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1200177821] [2019-12-27 19:16:22,345 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:22,346 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:22,349 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 15 transitions. [2019-12-27 19:16:22,349 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:22,351 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:22,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 19:16:22,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:22,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 19:16:22,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 19:16:22,353 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 19:16:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:22,401 INFO L93 Difference]: Finished difference Result 46 states and 98 transitions. [2019-12-27 19:16:22,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 19:16:22,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 19:16:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:22,403 INFO L225 Difference]: With dead ends: 46 [2019-12-27 19:16:22,403 INFO L226 Difference]: Without dead ends: 45 [2019-12-27 19:16:22,404 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:16:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-27 19:16:22,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-12-27 19:16:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-27 19:16:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 92 transitions. [2019-12-27 19:16:22,412 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 92 transitions. Word has length 7 [2019-12-27 19:16:22,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:22,413 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 92 transitions. [2019-12-27 19:16:22,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 19:16:22,413 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 92 transitions. [2019-12-27 19:16:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 19:16:22,414 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:22,414 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:22,414 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:22,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:22,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1079482909, now seen corresponding path program 1 times [2019-12-27 19:16:22,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:22,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642303539] [2019-12-27 19:16:22,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:22,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642303539] [2019-12-27 19:16:22,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:16:22,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 19:16:22,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [881402665] [2019-12-27 19:16:22,484 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:22,485 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:22,489 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 8 states and 7 transitions. [2019-12-27 19:16:22,490 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:22,490 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:22,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 19:16:22,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:22,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 19:16:22,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 19:16:22,491 INFO L87 Difference]: Start difference. First operand 41 states and 92 transitions. Second operand 4 states. [2019-12-27 19:16:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:22,518 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 19:16:22,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 19:16:22,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 19:16:22,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:22,520 INFO L225 Difference]: With dead ends: 51 [2019-12-27 19:16:22,520 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 19:16:22,520 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:16:22,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 19:16:22,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 19:16:22,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 19:16:22,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 19:16:22,529 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 19:16:22,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:22,529 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 19:16:22,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 19:16:22,529 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 19:16:22,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 19:16:22,530 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:22,530 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:22,531 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:22,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1673617116, now seen corresponding path program 2 times [2019-12-27 19:16:22,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:22,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410521232] [2019-12-27 19:16:22,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:22,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410521232] [2019-12-27 19:16:22,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635757638] [2019-12-27 19:16:22,608 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:22,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:22,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:22,681 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:16:22,686 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:22,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:22,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 19:16:22,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [356195557] [2019-12-27 19:16:22,747 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:22,747 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:22,749 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 20 transitions. [2019-12-27 19:16:22,749 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:22,749 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:22,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:16:22,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:22,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:16:22,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 19:16:22,751 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 5 states. [2019-12-27 19:16:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:22,805 INFO L93 Difference]: Finished difference Result 60 states and 126 transitions. [2019-12-27 19:16:22,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:16:22,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 19:16:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:22,806 INFO L225 Difference]: With dead ends: 60 [2019-12-27 19:16:22,807 INFO L226 Difference]: Without dead ends: 59 [2019-12-27 19:16:22,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:22,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-27 19:16:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2019-12-27 19:16:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 19:16:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2019-12-27 19:16:22,815 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 8 [2019-12-27 19:16:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:22,815 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2019-12-27 19:16:22,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:16:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2019-12-27 19:16:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 19:16:22,816 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:22,816 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:23,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:23,020 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:23,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:23,021 INFO L82 PathProgramCache]: Analyzing trace with hash 895768402, now seen corresponding path program 2 times [2019-12-27 19:16:23,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:23,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413444751] [2019-12-27 19:16:23,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:23,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413444751] [2019-12-27 19:16:23,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103837649] [2019-12-27 19:16:23,100 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 19:16:23,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:23,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:23,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:16:23,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:23,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:23,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 19:16:23,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1876258772] [2019-12-27 19:16:23,200 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:23,200 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:23,202 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 9 states and 8 transitions. [2019-12-27 19:16:23,202 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:23,202 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:23,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:16:23,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:23,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:16:23,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 19:16:23,203 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand 5 states. [2019-12-27 19:16:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:23,253 INFO L93 Difference]: Finished difference Result 61 states and 132 transitions. [2019-12-27 19:16:23,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:16:23,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 19:16:23,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:23,258 INFO L225 Difference]: With dead ends: 61 [2019-12-27 19:16:23,258 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 19:16:23,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:23,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 19:16:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-12-27 19:16:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 19:16:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 19:16:23,267 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 19:16:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:23,267 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 19:16:23,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:16:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 19:16:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:16:23,268 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:23,268 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:23,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:23,479 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash 343335240, now seen corresponding path program 3 times [2019-12-27 19:16:23,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:23,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657955682] [2019-12-27 19:16:23,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:23,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657955682] [2019-12-27 19:16:23,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959160520] [2019-12-27 19:16:23,583 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 19:16:23,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:16:23,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:23,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:23,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:23,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:23,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:23,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1895602599] [2019-12-27 19:16:23,699 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:23,700 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:23,702 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 25 transitions. [2019-12-27 19:16:23,702 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:23,703 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:23,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:23,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:23,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:23,704 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 6 states. [2019-12-27 19:16:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:23,786 INFO L93 Difference]: Finished difference Result 72 states and 152 transitions. [2019-12-27 19:16:23,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:23,787 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 19:16:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:23,788 INFO L225 Difference]: With dead ends: 72 [2019-12-27 19:16:23,788 INFO L226 Difference]: Without dead ends: 71 [2019-12-27 19:16:23,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-27 19:16:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2019-12-27 19:16:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 19:16:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 136 transitions. [2019-12-27 19:16:23,797 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 136 transitions. Word has length 9 [2019-12-27 19:16:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:23,797 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 136 transitions. [2019-12-27 19:16:23,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 136 transitions. [2019-12-27 19:16:23,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:16:23,798 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:23,798 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:23,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:24,000 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:24,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:24,001 INFO L82 PathProgramCache]: Analyzing trace with hash 317346018, now seen corresponding path program 1 times [2019-12-27 19:16:24,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:24,002 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740247247] [2019-12-27 19:16:24,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740247247] [2019-12-27 19:16:24,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:16:24,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 19:16:24,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1275105564] [2019-12-27 19:16:24,088 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:24,089 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:24,091 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 19:16:24,093 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:24,094 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:24,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:16:24,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:24,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:16:24,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:16:24,095 INFO L87 Difference]: Start difference. First operand 60 states and 136 transitions. Second operand 5 states. [2019-12-27 19:16:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:24,139 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-27 19:16:24,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:16:24,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 19:16:24,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:24,141 INFO L225 Difference]: With dead ends: 70 [2019-12-27 19:16:24,141 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 19:16:24,141 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-27 19:16:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 19:16:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-12-27 19:16:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-27 19:16:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 139 transitions. [2019-12-27 19:16:24,154 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 139 transitions. Word has length 9 [2019-12-27 19:16:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:24,159 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 139 transitions. [2019-12-27 19:16:24,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:16:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 139 transitions. [2019-12-27 19:16:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:16:24,160 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:24,160 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:24,160 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash -463142532, now seen corresponding path program 2 times [2019-12-27 19:16:24,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:24,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301296235] [2019-12-27 19:16:24,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301296235] [2019-12-27 19:16:24,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:16:24,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 19:16:24,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1556075000] [2019-12-27 19:16:24,236 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:24,237 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:24,239 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 17 transitions. [2019-12-27 19:16:24,239 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:24,246 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:24,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:16:24,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:24,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:16:24,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:16:24,248 INFO L87 Difference]: Start difference. First operand 63 states and 139 transitions. Second operand 5 states. [2019-12-27 19:16:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:24,286 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-27 19:16:24,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:16:24,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 19:16:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:24,288 INFO L225 Difference]: With dead ends: 70 [2019-12-27 19:16:24,288 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 19:16:24,288 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-27 19:16:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 19:16:24,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2019-12-27 19:16:24,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-27 19:16:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 140 transitions. [2019-12-27 19:16:24,294 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 140 transitions. Word has length 9 [2019-12-27 19:16:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:24,295 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 140 transitions. [2019-12-27 19:16:24,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:16:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 140 transitions. [2019-12-27 19:16:24,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:16:24,296 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:24,296 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:24,296 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:24,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1999016899, now seen corresponding path program 3 times [2019-12-27 19:16:24,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:24,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892323073] [2019-12-27 19:16:24,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892323073] [2019-12-27 19:16:24,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799692111] [2019-12-27 19:16:24,368 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 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 [2019-12-27 19:16:24,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:16:24,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:24,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:24,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:24,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:24,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [968250362] [2019-12-27 19:16:24,473 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:24,474 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:24,475 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 10 states and 9 transitions. [2019-12-27 19:16:24,475 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:24,476 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:24,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:24,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:24,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:24,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:24,477 INFO L87 Difference]: Start difference. First operand 64 states and 140 transitions. Second operand 6 states. [2019-12-27 19:16:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:24,560 INFO L93 Difference]: Finished difference Result 75 states and 160 transitions. [2019-12-27 19:16:24,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:24,560 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 19:16:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:24,561 INFO L225 Difference]: With dead ends: 75 [2019-12-27 19:16:24,561 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 19:16:24,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:24,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 19:16:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2019-12-27 19:16:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 19:16:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 19:16:24,567 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 19:16:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:24,567 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 19:16:24,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 19:16:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:24,568 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:24,569 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:24,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:24,769 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2054270044, now seen corresponding path program 4 times [2019-12-27 19:16:24,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:24,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549223552] [2019-12-27 19:16:24,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549223552] [2019-12-27 19:16:24,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045966901] [2019-12-27 19:16:24,834 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:24,879 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:24,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:24,880 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:24,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:24,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:24,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [252755155] [2019-12-27 19:16:24,989 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:24,990 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:24,992 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 30 transitions. [2019-12-27 19:16:24,992 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:24,993 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:24,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:24,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:24,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:24,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:24,996 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 7 states. [2019-12-27 19:16:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:25,104 INFO L93 Difference]: Finished difference Result 86 states and 180 transitions. [2019-12-27 19:16:25,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:25,105 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 19:16:25,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:25,105 INFO L225 Difference]: With dead ends: 86 [2019-12-27 19:16:25,106 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 19:16:25,106 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 19:16:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-27 19:16:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 19:16:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-27 19:16:25,111 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-27 19:16:25,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:25,112 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-27 19:16:25,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-27 19:16:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:25,112 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:25,113 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:25,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:25,319 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:25,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2028280822, now seen corresponding path program 3 times [2019-12-27 19:16:25,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:25,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22681837] [2019-12-27 19:16:25,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:25,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22681837] [2019-12-27 19:16:25,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976185977] [2019-12-27 19:16:25,402 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 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 [2019-12-27 19:16:25,444 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:16:25,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:25,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:25,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:25,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:25,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:25,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1354463651] [2019-12-27 19:16:25,509 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:25,509 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:25,511 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 28 transitions. [2019-12-27 19:16:25,511 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:25,512 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:25,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:25,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:25,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:25,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:25,513 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 6 states. [2019-12-27 19:16:25,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:25,582 INFO L93 Difference]: Finished difference Result 85 states and 182 transitions. [2019-12-27 19:16:25,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:25,583 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:25,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:25,584 INFO L225 Difference]: With dead ends: 85 [2019-12-27 19:16:25,584 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 19:16:25,584 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:25,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 19:16:25,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2019-12-27 19:16:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 19:16:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-27 19:16:25,593 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-27 19:16:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:25,593 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-27 19:16:25,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-27 19:16:25,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:25,594 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:25,594 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:25,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:25,795 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:25,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:25,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792179, now seen corresponding path program 4 times [2019-12-27 19:16:25,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:25,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244925295] [2019-12-27 19:16:25,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:25,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244925295] [2019-12-27 19:16:25,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261600620] [2019-12-27 19:16:25,863 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 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 [2019-12-27 19:16:25,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:25,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:25,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:25,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:25,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:25,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:25,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1832274795] [2019-12-27 19:16:25,958 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:25,959 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:25,961 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 19:16:25,961 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:25,961 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:25,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:25,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:25,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:25,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:25,962 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 6 states. [2019-12-27 19:16:26,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:26,035 INFO L93 Difference]: Finished difference Result 87 states and 184 transitions. [2019-12-27 19:16:26,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:26,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:26,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:26,037 INFO L225 Difference]: With dead ends: 87 [2019-12-27 19:16:26,037 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 19:16:26,038 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 19:16:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2019-12-27 19:16:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 19:16:26,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2019-12-27 19:16:26,043 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 10 [2019-12-27 19:16:26,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:26,043 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2019-12-27 19:16:26,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2019-12-27 19:16:26,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:26,044 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:26,044 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:26,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:26,248 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:26,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792272, now seen corresponding path program 5 times [2019-12-27 19:16:26,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:26,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581025505] [2019-12-27 19:16:26,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:26,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581025505] [2019-12-27 19:16:26,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042434299] [2019-12-27 19:16:26,300 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 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 [2019-12-27 19:16:26,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:26,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:26,351 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:26,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:26,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:26,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:26,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [447619426] [2019-12-27 19:16:26,401 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:26,402 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:26,404 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 19:16:26,404 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:26,405 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:26,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:26,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:26,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:26,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:26,406 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand 6 states. [2019-12-27 19:16:26,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:26,489 INFO L93 Difference]: Finished difference Result 88 states and 188 transitions. [2019-12-27 19:16:26,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:26,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:26,490 INFO L225 Difference]: With dead ends: 88 [2019-12-27 19:16:26,490 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 19:16:26,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 19:16:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2019-12-27 19:16:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 19:16:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 169 transitions. [2019-12-27 19:16:26,514 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 169 transitions. Word has length 10 [2019-12-27 19:16:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:26,514 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 169 transitions. [2019-12-27 19:16:26,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:26,515 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 169 transitions. [2019-12-27 19:16:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:26,515 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:26,516 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:26,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:26,723 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:26,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1472519181, now seen corresponding path program 6 times [2019-12-27 19:16:26,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:26,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83316395] [2019-12-27 19:16:26,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:26,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83316395] [2019-12-27 19:16:26,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289214097] [2019-12-27 19:16:26,781 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:26,832 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:26,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:26,833 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:26,834 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:26,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:26,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:26,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2135296897] [2019-12-27 19:16:26,890 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:26,892 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:26,895 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 20 transitions. [2019-12-27 19:16:26,895 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:26,900 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:26,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:26,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:26,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:26,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:26,902 INFO L87 Difference]: Start difference. First operand 76 states and 169 transitions. Second operand 6 states. [2019-12-27 19:16:26,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:26,987 INFO L93 Difference]: Finished difference Result 88 states and 188 transitions. [2019-12-27 19:16:26,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:26,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:26,988 INFO L225 Difference]: With dead ends: 88 [2019-12-27 19:16:26,989 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 19:16:26,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 19:16:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2019-12-27 19:16:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 19:16:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2019-12-27 19:16:26,998 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 10 [2019-12-27 19:16:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:26,998 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2019-12-27 19:16:26,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2019-12-27 19:16:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:26,999 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:26,999 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:27,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:27,208 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1472516391, now seen corresponding path program 7 times [2019-12-27 19:16:27,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:27,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760818884] [2019-12-27 19:16:27,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:27,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760818884] [2019-12-27 19:16:27,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249603830] [2019-12-27 19:16:27,273 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 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 [2019-12-27 19:16:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:27,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:27,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:27,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:27,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:27,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1689526856] [2019-12-27 19:16:27,417 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:27,418 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:27,419 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 19:16:27,419 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:27,421 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:27,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:27,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:27,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:27,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:27,422 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand 6 states. [2019-12-27 19:16:27,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:27,507 INFO L93 Difference]: Finished difference Result 87 states and 184 transitions. [2019-12-27 19:16:27,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:27,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:27,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:27,509 INFO L225 Difference]: With dead ends: 87 [2019-12-27 19:16:27,509 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 19:16:27,510 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:27,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 19:16:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2019-12-27 19:16:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 19:16:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 169 transitions. [2019-12-27 19:16:27,514 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 169 transitions. Word has length 10 [2019-12-27 19:16:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:27,514 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 169 transitions. [2019-12-27 19:16:27,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 169 transitions. [2019-12-27 19:16:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:27,515 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:27,515 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:27,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:27,719 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:27,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1472516298, now seen corresponding path program 8 times [2019-12-27 19:16:27,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:27,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398893418] [2019-12-27 19:16:27,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:27,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398893418] [2019-12-27 19:16:27,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345457988] [2019-12-27 19:16:27,808 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 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 [2019-12-27 19:16:27,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:27,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:27,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:27,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:27,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:27,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:27,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1377987081] [2019-12-27 19:16:27,936 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:27,937 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:27,939 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 19:16:27,939 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:27,940 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:27,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:27,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:27,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:27,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:27,941 INFO L87 Difference]: Start difference. First operand 76 states and 169 transitions. Second operand 6 states. [2019-12-27 19:16:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:28,004 INFO L93 Difference]: Finished difference Result 86 states and 183 transitions. [2019-12-27 19:16:28,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:28,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:28,006 INFO L225 Difference]: With dead ends: 86 [2019-12-27 19:16:28,006 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 19:16:28,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 19:16:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2019-12-27 19:16:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 19:16:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2019-12-27 19:16:28,010 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 10 [2019-12-27 19:16:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:28,011 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2019-12-27 19:16:28,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2019-12-27 19:16:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:28,011 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:28,011 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:28,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:28,215 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:28,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:28,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1839981938, now seen corresponding path program 4 times [2019-12-27 19:16:28,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:28,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618306847] [2019-12-27 19:16:28,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:28,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618306847] [2019-12-27 19:16:28,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157926467] [2019-12-27 19:16:28,275 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:28,326 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:28,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:28,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:28,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:28,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:28,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:28,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [843450393] [2019-12-27 19:16:28,431 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:28,432 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:28,433 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 11 states and 10 transitions. [2019-12-27 19:16:28,433 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:28,433 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:28,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:28,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:28,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:28,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:28,434 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand 7 states. [2019-12-27 19:16:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:28,543 INFO L93 Difference]: Finished difference Result 90 states and 192 transitions. [2019-12-27 19:16:28,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:28,544 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 19:16:28,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:28,545 INFO L225 Difference]: With dead ends: 90 [2019-12-27 19:16:28,545 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 19:16:28,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 19:16:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-12-27 19:16:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 19:16:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 19:16:28,550 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 19:16:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:28,550 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 19:16:28,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 19:16:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:28,551 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:28,551 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:28,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:28,754 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:28,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:28,755 INFO L82 PathProgramCache]: Analyzing trace with hash -741325880, now seen corresponding path program 5 times [2019-12-27 19:16:28,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:28,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043593723] [2019-12-27 19:16:28,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:28,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043593723] [2019-12-27 19:16:28,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716963941] [2019-12-27 19:16:28,840 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:28,882 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:28,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:28,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:28,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:28,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:28,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:28,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [444866556] [2019-12-27 19:16:28,979 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:28,980 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:28,982 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 19:16:28,982 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:28,983 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:28,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:28,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:28,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:28,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:28,984 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 8 states. [2019-12-27 19:16:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:29,103 INFO L93 Difference]: Finished difference Result 101 states and 212 transitions. [2019-12-27 19:16:29,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:29,104 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 19:16:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:29,105 INFO L225 Difference]: With dead ends: 101 [2019-12-27 19:16:29,105 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 19:16:29,105 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 19:16:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2019-12-27 19:16:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:16:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 19:16:29,109 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 19:16:29,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:29,109 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 19:16:29,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:29,110 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 19:16:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:29,110 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:29,110 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:29,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:29,314 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:29,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:29,314 INFO L82 PathProgramCache]: Analyzing trace with hash -767315102, now seen corresponding path program 9 times [2019-12-27 19:16:29,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:29,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924395590] [2019-12-27 19:16:29,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:29,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924395590] [2019-12-27 19:16:29,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424975996] [2019-12-27 19:16:29,377 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:29,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:16:29,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:29,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:29,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:29,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:29,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:29,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2110107969] [2019-12-27 19:16:29,505 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:29,506 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:29,508 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 19:16:29,508 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:29,509 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:29,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:29,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:29,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:29,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:29,510 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 19:16:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:29,616 INFO L93 Difference]: Finished difference Result 102 states and 219 transitions. [2019-12-27 19:16:29,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:29,616 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:29,618 INFO L225 Difference]: With dead ends: 102 [2019-12-27 19:16:29,618 INFO L226 Difference]: Without dead ends: 101 [2019-12-27 19:16:29,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-27 19:16:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2019-12-27 19:16:29,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:16:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 19:16:29,623 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 19:16:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:29,623 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 19:16:29,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:29,623 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 19:16:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:29,624 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:29,624 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:29,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:29,831 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:29,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803745, now seen corresponding path program 10 times [2019-12-27 19:16:29,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:29,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036394579] [2019-12-27 19:16:29,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:29,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036394579] [2019-12-27 19:16:29,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615012510] [2019-12-27 19:16:29,907 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:29,956 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:29,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:29,957 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:29,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:30,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:30,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:30,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1450856962] [2019-12-27 19:16:30,056 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:30,078 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:30,081 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 19:16:30,081 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:30,081 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:30,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:30,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:30,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:30,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:30,082 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 19:16:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:30,193 INFO L93 Difference]: Finished difference Result 105 states and 225 transitions. [2019-12-27 19:16:30,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:30,193 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:30,194 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:30,194 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:30,195 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:30,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2019-12-27 19:16:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:16:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 19:16:30,198 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 19:16:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:30,198 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 19:16:30,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 19:16:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:30,199 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:30,199 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:30,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:30,400 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:30,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803652, now seen corresponding path program 11 times [2019-12-27 19:16:30,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:30,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727113978] [2019-12-27 19:16:30,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:30,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727113978] [2019-12-27 19:16:30,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932919602] [2019-12-27 19:16:30,486 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:30,527 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:30,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:30,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:30,531 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:30,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:30,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:30,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1152367154] [2019-12-27 19:16:30,647 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:30,648 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:30,650 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 19:16:30,651 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:30,651 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:30,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:30,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:30,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:30,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:30,652 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 19:16:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:30,792 INFO L93 Difference]: Finished difference Result 105 states and 225 transitions. [2019-12-27 19:16:30,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:30,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:30,794 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:30,794 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:30,794 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:30,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2019-12-27 19:16:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:16:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 19:16:30,797 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 19:16:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:30,798 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 19:16:30,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 19:16:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:30,799 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:30,799 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:31,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:31,003 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:31,003 INFO L82 PathProgramCache]: Analyzing trace with hash 26852098, now seen corresponding path program 12 times [2019-12-27 19:16:31,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:31,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281853237] [2019-12-27 19:16:31,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:31,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281853237] [2019-12-27 19:16:31,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114047370] [2019-12-27 19:16:31,082 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:31,131 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:31,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:31,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:31,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:31,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:31,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:31,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1310745790] [2019-12-27 19:16:31,229 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:31,231 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:31,233 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:16:31,233 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:31,233 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:31,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:31,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:31,234 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 19:16:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:31,373 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2019-12-27 19:16:31,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:31,373 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:31,375 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:31,375 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:31,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2019-12-27 19:16:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 19:16:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-27 19:16:31,381 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-27 19:16:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:31,382 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-27 19:16:31,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-27 19:16:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:31,383 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:31,383 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:31,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:31,589 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash 26852191, now seen corresponding path program 13 times [2019-12-27 19:16:31,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:31,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417487561] [2019-12-27 19:16:31,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:31,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417487561] [2019-12-27 19:16:31,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447684068] [2019-12-27 19:16:31,662 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:31,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:31,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:31,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:31,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:31,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1914229782] [2019-12-27 19:16:31,808 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:31,809 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:31,814 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:16:31,814 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:31,815 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:31,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:31,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:31,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:31,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:31,816 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 7 states. [2019-12-27 19:16:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:31,980 INFO L93 Difference]: Finished difference Result 108 states and 231 transitions. [2019-12-27 19:16:31,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:31,981 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:31,982 INFO L225 Difference]: With dead ends: 108 [2019-12-27 19:16:31,982 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 19:16:31,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 19:16:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2019-12-27 19:16:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:31,987 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:31,987 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:31,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:31,988 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:31,988 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:32,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:32,193 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:32,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:32,193 INFO L82 PathProgramCache]: Analyzing trace with hash 26854981, now seen corresponding path program 14 times [2019-12-27 19:16:32,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:32,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726978477] [2019-12-27 19:16:32,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:32,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726978477] [2019-12-27 19:16:32,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125156476] [2019-12-27 19:16:32,270 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:32,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:32,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:32,322 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:32,323 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:32,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:32,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:32,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1985362428] [2019-12-27 19:16:32,396 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:32,396 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:32,397 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:16:32,398 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:32,398 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:32,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:32,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:32,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:32,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:32,399 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:32,506 INFO L93 Difference]: Finished difference Result 109 states and 235 transitions. [2019-12-27 19:16:32,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:32,507 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:32,508 INFO L225 Difference]: With dead ends: 109 [2019-12-27 19:16:32,509 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 19:16:32,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 19:16:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2019-12-27 19:16:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:32,513 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:32,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:32,514 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:32,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:32,514 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:32,514 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:32,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:32,717 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:32,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:32,718 INFO L82 PathProgramCache]: Analyzing trace with hash 26855074, now seen corresponding path program 15 times [2019-12-27 19:16:32,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:32,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349975552] [2019-12-27 19:16:32,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:32,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349975552] [2019-12-27 19:16:32,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339084242] [2019-12-27 19:16:32,780 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:32,822 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:16:32,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:32,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:32,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:32,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:32,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:32,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [811401215] [2019-12-27 19:16:32,884 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:32,885 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:32,886 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:16:32,886 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:32,886 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:32,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:32,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:32,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:32,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:32,887 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:32,992 INFO L93 Difference]: Finished difference Result 107 states and 230 transitions. [2019-12-27 19:16:32,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:32,993 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:32,994 INFO L225 Difference]: With dead ends: 107 [2019-12-27 19:16:32,994 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 19:16:32,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 19:16:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2019-12-27 19:16:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:32,997 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:32,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:32,997 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:32,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:32,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:32,998 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:32,998 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:33,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:33,201 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:33,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1596543068, now seen corresponding path program 16 times [2019-12-27 19:16:33,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:33,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253560084] [2019-12-27 19:16:33,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:33,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253560084] [2019-12-27 19:16:33,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371566021] [2019-12-27 19:16:33,273 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:33,317 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:33,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:33,318 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:33,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:33,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:33,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:33,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1997164381] [2019-12-27 19:16:33,400 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:33,401 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:33,402 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:16:33,403 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:33,404 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:16:33,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:33,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:33,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:33,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:33,405 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:33,530 INFO L93 Difference]: Finished difference Result 106 states and 226 transitions. [2019-12-27 19:16:33,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:33,531 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:33,533 INFO L225 Difference]: With dead ends: 106 [2019-12-27 19:16:33,533 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 19:16:33,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 19:16:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2019-12-27 19:16:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 19:16:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-27 19:16:33,536 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-27 19:16:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:33,537 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-27 19:16:33,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:33,537 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-27 19:16:33,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:33,537 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:33,537 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:33,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:33,741 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:33,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1596545858, now seen corresponding path program 17 times [2019-12-27 19:16:33,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:33,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412056922] [2019-12-27 19:16:33,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:33,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412056922] [2019-12-27 19:16:33,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82941886] [2019-12-27 19:16:33,810 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:33,876 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:33,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:33,877 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:33,878 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:33,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:33,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:33,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [778706423] [2019-12-27 19:16:33,991 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:33,992 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:33,995 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 19:16:33,995 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:33,996 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:33,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:33,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:33,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:34,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:34,001 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 7 states. [2019-12-27 19:16:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:34,131 INFO L93 Difference]: Finished difference Result 111 states and 234 transitions. [2019-12-27 19:16:34,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:34,132 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:34,132 INFO L225 Difference]: With dead ends: 111 [2019-12-27 19:16:34,133 INFO L226 Difference]: Without dead ends: 110 [2019-12-27 19:16:34,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-12-27 19:16:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2019-12-27 19:16:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:34,137 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:34,137 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:34,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:34,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:34,138 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:34,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:34,341 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:34,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:34,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1596545951, now seen corresponding path program 18 times [2019-12-27 19:16:34,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:34,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080942679] [2019-12-27 19:16:34,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:34,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080942679] [2019-12-27 19:16:34,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624046300] [2019-12-27 19:16:34,405 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:34,447 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:34,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:34,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:34,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:34,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:34,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:34,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [592346239] [2019-12-27 19:16:34,527 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:34,527 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:34,529 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 19:16:34,529 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:34,530 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:34,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:34,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:34,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:34,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:34,531 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:34,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:34,641 INFO L93 Difference]: Finished difference Result 106 states and 226 transitions. [2019-12-27 19:16:34,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:34,641 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:34,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:34,642 INFO L225 Difference]: With dead ends: 106 [2019-12-27 19:16:34,642 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 19:16:34,643 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 19:16:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2019-12-27 19:16:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-27 19:16:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 191 transitions. [2019-12-27 19:16:34,646 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 191 transitions. Word has length 11 [2019-12-27 19:16:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:34,646 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 191 transitions. [2019-12-27 19:16:34,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 191 transitions. [2019-12-27 19:16:34,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:34,647 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:34,647 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:34,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:34,850 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:34,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:34,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1596632348, now seen corresponding path program 19 times [2019-12-27 19:16:34,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:34,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496040804] [2019-12-27 19:16:34,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:34,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496040804] [2019-12-27 19:16:34,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032861855] [2019-12-27 19:16:34,913 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:34,957 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:34,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:35,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:35,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:35,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2139409942] [2019-12-27 19:16:35,021 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:35,022 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:35,022 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 19:16:35,023 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:35,023 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:35,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:35,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:35,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:35,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:35,024 INFO L87 Difference]: Start difference. First operand 87 states and 191 transitions. Second operand 7 states. [2019-12-27 19:16:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:35,140 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2019-12-27 19:16:35,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:35,141 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:35,141 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:35,141 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:35,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2019-12-27 19:16:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:35,146 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:35,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:35,146 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:35,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:35,146 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:35,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:35,147 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:35,147 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:35,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:35,350 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:35,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:35,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1596632441, now seen corresponding path program 20 times [2019-12-27 19:16:35,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:35,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678620247] [2019-12-27 19:16:35,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:35,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678620247] [2019-12-27 19:16:35,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674767877] [2019-12-27 19:16:35,407 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:35,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:35,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:35,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:35,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:35,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:35,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:35,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1496323639] [2019-12-27 19:16:35,522 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:35,523 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:35,524 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 19:16:35,524 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:35,525 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:35,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:35,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:35,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:35,526 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:35,650 INFO L93 Difference]: Finished difference Result 110 states and 233 transitions. [2019-12-27 19:16:35,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:35,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:35,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:35,652 INFO L225 Difference]: With dead ends: 110 [2019-12-27 19:16:35,652 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 19:16:35,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:35,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 19:16:35,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2019-12-27 19:16:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 19:16:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-27 19:16:35,656 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-27 19:16:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:35,656 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-27 19:16:35,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-27 19:16:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:35,657 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:35,657 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:35,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:35,860 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:35,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1596635231, now seen corresponding path program 21 times [2019-12-27 19:16:35,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:35,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084638255] [2019-12-27 19:16:35,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:35,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084638255] [2019-12-27 19:16:35,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789042350] [2019-12-27 19:16:35,921 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 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 [2019-12-27 19:16:35,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:35,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:35,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:35,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:36,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:36,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:36,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [221340715] [2019-12-27 19:16:36,063 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:36,064 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:36,065 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 19:16:36,065 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:36,066 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:36,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:36,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:36,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:36,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:36,067 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 7 states. [2019-12-27 19:16:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:36,185 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2019-12-27 19:16:36,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:36,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:36,186 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:36,186 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:36,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2019-12-27 19:16:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:36,190 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:36,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:36,190 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:36,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:36,191 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:36,191 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:36,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:36,392 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:36,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:36,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1596635324, now seen corresponding path program 22 times [2019-12-27 19:16:36,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:36,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479154084] [2019-12-27 19:16:36,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:36,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479154084] [2019-12-27 19:16:36,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161563205] [2019-12-27 19:16:36,444 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 19:16:36,485 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:36,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:36,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:36,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:36,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:36,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:36,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [804840744] [2019-12-27 19:16:36,554 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:36,555 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:36,556 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 19:16:36,556 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:36,557 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:36,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:36,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:36,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:36,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:36,558 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:36,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:36,672 INFO L93 Difference]: Finished difference Result 103 states and 217 transitions. [2019-12-27 19:16:36,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:36,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:36,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:36,673 INFO L225 Difference]: With dead ends: 103 [2019-12-27 19:16:36,673 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 19:16:36,674 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 19:16:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2019-12-27 19:16:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 19:16:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 192 transitions. [2019-12-27 19:16:36,677 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 192 transitions. Word has length 11 [2019-12-27 19:16:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:36,678 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 192 transitions. [2019-12-27 19:16:36,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 192 transitions. [2019-12-27 19:16:36,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:36,679 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:36,679 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:36,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:36,882 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1204865443, now seen corresponding path program 5 times [2019-12-27 19:16:36,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:36,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666439602] [2019-12-27 19:16:36,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:36,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666439602] [2019-12-27 19:16:36,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388902033] [2019-12-27 19:16:36,959 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 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 [2019-12-27 19:16:37,003 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:37,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:37,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:37,005 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:37,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:37,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:37,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [38183207] [2019-12-27 19:16:37,147 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:37,148 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:37,150 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 11 transitions. [2019-12-27 19:16:37,150 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:37,150 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:37,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:37,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:37,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:37,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:37,152 INFO L87 Difference]: Start difference. First operand 88 states and 192 transitions. Second operand 8 states. [2019-12-27 19:16:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:37,333 INFO L93 Difference]: Finished difference Result 105 states and 224 transitions. [2019-12-27 19:16:37,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:37,333 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 19:16:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:37,335 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:37,335 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:37,336 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:37,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2019-12-27 19:16:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 19:16:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 19:16:37,342 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 19:16:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:37,342 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 19:16:37,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:37,343 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 19:16:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:37,344 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:37,344 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:37,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:37,548 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1505453604, now seen corresponding path program 6 times [2019-12-27 19:16:37,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:37,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062631583] [2019-12-27 19:16:37,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:37,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062631583] [2019-12-27 19:16:37,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798402290] [2019-12-27 19:16:37,663 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 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 [2019-12-27 19:16:37,733 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:16:37,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:37,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:37,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:37,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:37,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:16:37,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1419206092] [2019-12-27 19:16:37,908 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:37,909 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:37,913 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 40 transitions. [2019-12-27 19:16:37,913 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:37,914 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:37,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:16:37,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:37,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:16:37,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:37,915 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 9 states. [2019-12-27 19:16:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:38,124 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-27 19:16:38,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:38,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 19:16:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:38,125 INFO L225 Difference]: With dead ends: 116 [2019-12-27 19:16:38,126 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 19:16:38,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:16:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 19:16:38,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2019-12-27 19:16:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:38,133 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:38,133 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:38,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:16:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:38,134 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:38,134 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:38,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:38,338 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:38,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:38,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1531442826, now seen corresponding path program 23 times [2019-12-27 19:16:38,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:38,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98143740] [2019-12-27 19:16:38,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:38,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98143740] [2019-12-27 19:16:38,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194435218] [2019-12-27 19:16:38,403 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 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 [2019-12-27 19:16:38,449 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:38,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:38,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:38,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:38,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:38,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:38,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1028613430] [2019-12-27 19:16:38,547 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:38,548 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:38,550 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 42 transitions. [2019-12-27 19:16:38,550 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:38,550 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:38,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:38,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:38,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:38,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:38,551 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:38,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:38,698 INFO L93 Difference]: Finished difference Result 120 states and 257 transitions. [2019-12-27 19:16:38,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:38,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:38,700 INFO L225 Difference]: With dead ends: 120 [2019-12-27 19:16:38,700 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 19:16:38,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 19:16:38,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 98. [2019-12-27 19:16:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:38,704 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:38,705 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:38,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:38,705 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:38,705 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:38,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:38,909 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:38,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035827, now seen corresponding path program 24 times [2019-12-27 19:16:38,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:38,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332760387] [2019-12-27 19:16:38,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:38,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332760387] [2019-12-27 19:16:38,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593814397] [2019-12-27 19:16:38,977 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 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 [2019-12-27 19:16:39,021 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:39,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:39,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:39,024 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:39,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:39,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:39,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [807325490] [2019-12-27 19:16:39,165 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:39,166 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:39,170 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 19:16:39,170 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:39,171 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:39,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:39,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:39,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:39,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:39,172 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:39,367 INFO L93 Difference]: Finished difference Result 125 states and 268 transitions. [2019-12-27 19:16:39,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:39,368 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:39,369 INFO L225 Difference]: With dead ends: 125 [2019-12-27 19:16:39,369 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 19:16:39,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 19:16:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2019-12-27 19:16:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:39,373 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:39,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:39,373 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:39,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:39,373 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:39,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:39,375 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:39,376 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:39,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:39,580 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035920, now seen corresponding path program 25 times [2019-12-27 19:16:39,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:39,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175298233] [2019-12-27 19:16:39,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:39,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175298233] [2019-12-27 19:16:39,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962602114] [2019-12-27 19:16:39,644 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 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 [2019-12-27 19:16:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:39,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:39,695 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:40,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:40,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:40,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1965317536] [2019-12-27 19:16:40,410 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:40,411 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:40,413 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 19:16:40,413 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:40,413 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:40,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:40,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:40,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:40,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:40,414 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:40,595 INFO L93 Difference]: Finished difference Result 125 states and 268 transitions. [2019-12-27 19:16:40,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:40,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:40,597 INFO L225 Difference]: With dead ends: 125 [2019-12-27 19:16:40,597 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 19:16:40,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 19:16:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2019-12-27 19:16:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:40,602 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:40,603 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:40,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:40,603 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:40,603 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:40,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:40,806 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash -737275626, now seen corresponding path program 26 times [2019-12-27 19:16:40,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:40,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168058827] [2019-12-27 19:16:40,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:40,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168058827] [2019-12-27 19:16:40,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722557560] [2019-12-27 19:16:40,913 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 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 [2019-12-27 19:16:40,959 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:40,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:40,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:40,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:41,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:41,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:41,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1340260159] [2019-12-27 19:16:41,060 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:41,061 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:41,063 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 19:16:41,063 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:41,063 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:41,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:41,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:41,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:41,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:41,064 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:41,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:41,208 INFO L93 Difference]: Finished difference Result 126 states and 269 transitions. [2019-12-27 19:16:41,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:41,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:41,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:41,209 INFO L225 Difference]: With dead ends: 126 [2019-12-27 19:16:41,209 INFO L226 Difference]: Without dead ends: 125 [2019-12-27 19:16:41,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-27 19:16:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2019-12-27 19:16:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:41,213 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:41,213 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:41,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:41,214 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:41,214 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:41,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:41,417 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash -737275533, now seen corresponding path program 27 times [2019-12-27 19:16:41,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:41,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538102708] [2019-12-27 19:16:41,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:41,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538102708] [2019-12-27 19:16:41,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644077631] [2019-12-27 19:16:41,486 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 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 [2019-12-27 19:16:41,540 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:41,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:41,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:41,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:41,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:41,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:41,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [718904462] [2019-12-27 19:16:41,711 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:41,713 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:41,715 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 19:16:41,715 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:41,716 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:41,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:41,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:41,717 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:41,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:41,915 INFO L93 Difference]: Finished difference Result 127 states and 273 transitions. [2019-12-27 19:16:41,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:41,915 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:41,916 INFO L225 Difference]: With dead ends: 127 [2019-12-27 19:16:41,917 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 19:16:41,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 19:16:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2019-12-27 19:16:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 19:16:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 226 transitions. [2019-12-27 19:16:41,921 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 226 transitions. Word has length 12 [2019-12-27 19:16:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:41,921 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 226 transitions. [2019-12-27 19:16:41,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 226 transitions. [2019-12-27 19:16:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:41,922 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:41,922 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:42,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:42,126 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:42,126 INFO L82 PathProgramCache]: Analyzing trace with hash -737272743, now seen corresponding path program 28 times [2019-12-27 19:16:42,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:42,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55004967] [2019-12-27 19:16:42,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:42,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55004967] [2019-12-27 19:16:42,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60234295] [2019-12-27 19:16:42,201 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:42,244 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:42,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:42,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:42,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:42,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:42,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:42,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [833348080] [2019-12-27 19:16:42,376 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:42,377 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:42,378 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 19:16:42,378 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:42,378 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:42,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:42,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:42,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:42,379 INFO L87 Difference]: Start difference. First operand 99 states and 226 transitions. Second operand 8 states. [2019-12-27 19:16:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:42,558 INFO L93 Difference]: Finished difference Result 129 states and 275 transitions. [2019-12-27 19:16:42,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:42,559 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:42,561 INFO L225 Difference]: With dead ends: 129 [2019-12-27 19:16:42,561 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 19:16:42,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 19:16:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2019-12-27 19:16:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 19:16:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 226 transitions. [2019-12-27 19:16:42,565 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 226 transitions. Word has length 12 [2019-12-27 19:16:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:42,565 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 226 transitions. [2019-12-27 19:16:42,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 226 transitions. [2019-12-27 19:16:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:42,566 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:42,566 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:42,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:42,767 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:42,767 INFO L82 PathProgramCache]: Analyzing trace with hash -737272650, now seen corresponding path program 29 times [2019-12-27 19:16:42,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:42,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271008596] [2019-12-27 19:16:42,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:42,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271008596] [2019-12-27 19:16:42,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331471643] [2019-12-27 19:16:42,832 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 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 [2019-12-27 19:16:42,873 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:42,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:42,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:42,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:43,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:43,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:43,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2018325407] [2019-12-27 19:16:43,018 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:43,019 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:43,021 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 19:16:43,021 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:43,021 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:43,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:43,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:43,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:43,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:43,022 INFO L87 Difference]: Start difference. First operand 99 states and 226 transitions. Second operand 8 states. [2019-12-27 19:16:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:43,219 INFO L93 Difference]: Finished difference Result 127 states and 273 transitions. [2019-12-27 19:16:43,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:43,220 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:43,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:43,221 INFO L225 Difference]: With dead ends: 127 [2019-12-27 19:16:43,221 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 19:16:43,222 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 19:16:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2019-12-27 19:16:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:43,226 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:43,226 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:43,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:43,227 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:43,227 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:43,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:43,430 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:43,430 INFO L82 PathProgramCache]: Analyzing trace with hash 832415251, now seen corresponding path program 30 times [2019-12-27 19:16:43,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:43,431 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834588498] [2019-12-27 19:16:43,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:43,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834588498] [2019-12-27 19:16:43,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126043337] [2019-12-27 19:16:43,490 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 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 [2019-12-27 19:16:43,534 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:16:43,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:43,534 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:43,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:43,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:43,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:43,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [424446635] [2019-12-27 19:16:43,626 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:43,628 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:43,629 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:43,629 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:43,629 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:43,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:43,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:43,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:43,630 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:43,750 INFO L93 Difference]: Finished difference Result 123 states and 260 transitions. [2019-12-27 19:16:43,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:43,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:43,751 INFO L225 Difference]: With dead ends: 123 [2019-12-27 19:16:43,751 INFO L226 Difference]: Without dead ends: 122 [2019-12-27 19:16:43,752 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-12-27 19:16:43,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2019-12-27 19:16:43,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 19:16:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 19:16:43,755 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 19:16:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:43,755 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 19:16:43,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 19:16:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:43,756 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:43,756 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:43,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:43,960 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:43,960 INFO L82 PathProgramCache]: Analyzing trace with hash 832415344, now seen corresponding path program 31 times [2019-12-27 19:16:43,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:43,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178565394] [2019-12-27 19:16:43,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:44,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178565394] [2019-12-27 19:16:44,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616096509] [2019-12-27 19:16:44,090 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 19:16:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:44,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:44,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:44,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:44,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:44,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [59496847] [2019-12-27 19:16:44,222 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:44,223 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:44,224 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:44,224 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:44,224 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:44,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:44,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:44,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:44,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:44,225 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 19:16:44,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:44,387 INFO L93 Difference]: Finished difference Result 129 states and 275 transitions. [2019-12-27 19:16:44,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:44,388 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:44,389 INFO L225 Difference]: With dead ends: 129 [2019-12-27 19:16:44,389 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 19:16:44,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 19:16:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 103. [2019-12-27 19:16:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:16:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 19:16:44,392 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 19:16:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:44,392 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 19:16:44,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 19:16:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:44,393 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:44,393 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:44,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:44,594 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:44,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:44,595 INFO L82 PathProgramCache]: Analyzing trace with hash 832418134, now seen corresponding path program 32 times [2019-12-27 19:16:44,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:44,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470795881] [2019-12-27 19:16:44,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:44,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470795881] [2019-12-27 19:16:44,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972899662] [2019-12-27 19:16:44,671 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 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 [2019-12-27 19:16:44,713 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:44,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:44,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:44,715 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:44,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:44,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:44,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1136284958] [2019-12-27 19:16:44,831 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:44,832 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:44,834 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:44,834 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:44,834 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:44,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:44,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:44,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:44,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:44,835 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 19:16:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:45,029 INFO L93 Difference]: Finished difference Result 131 states and 280 transitions. [2019-12-27 19:16:45,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:45,029 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:45,030 INFO L225 Difference]: With dead ends: 131 [2019-12-27 19:16:45,030 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 19:16:45,031 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:16:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 19:16:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 103. [2019-12-27 19:16:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:16:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 19:16:45,034 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 19:16:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:45,034 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 19:16:45,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 19:16:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:45,035 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:45,035 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:45,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:45,236 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:45,236 INFO L82 PathProgramCache]: Analyzing trace with hash 832418227, now seen corresponding path program 33 times [2019-12-27 19:16:45,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:45,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767051461] [2019-12-27 19:16:45,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:45,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767051461] [2019-12-27 19:16:45,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455193182] [2019-12-27 19:16:45,298 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 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 [2019-12-27 19:16:45,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:45,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:45,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:45,358 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:45,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:45,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:45,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1111472407] [2019-12-27 19:16:45,453 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:45,454 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:45,456 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:45,456 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:45,456 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:45,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:45,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:45,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:45,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:45,457 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 19:16:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:45,606 INFO L93 Difference]: Finished difference Result 130 states and 279 transitions. [2019-12-27 19:16:45,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:45,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:45,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:45,607 INFO L225 Difference]: With dead ends: 130 [2019-12-27 19:16:45,607 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 19:16:45,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 19:16:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2019-12-27 19:16:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:45,609 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:45,609 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:45,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:45,610 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:45,610 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:45,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:45,813 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:45,814 INFO L82 PathProgramCache]: Analyzing trace with hash 832504624, now seen corresponding path program 34 times [2019-12-27 19:16:45,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:45,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79816232] [2019-12-27 19:16:45,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:45,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79816232] [2019-12-27 19:16:45,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897856324] [2019-12-27 19:16:45,875 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:45,923 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:45,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:45,924 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:45,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:46,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:46,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:46,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [32064508] [2019-12-27 19:16:46,029 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:46,031 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:46,033 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:46,033 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:46,033 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:46,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:46,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:46,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:46,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:46,034 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:46,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:46,185 INFO L93 Difference]: Finished difference Result 133 states and 285 transitions. [2019-12-27 19:16:46,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:46,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:46,187 INFO L225 Difference]: With dead ends: 133 [2019-12-27 19:16:46,187 INFO L226 Difference]: Without dead ends: 132 [2019-12-27 19:16:46,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-27 19:16:46,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2019-12-27 19:16:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:46,191 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:46,192 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:46,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:46,192 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:46,192 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:46,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:46,396 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:46,397 INFO L82 PathProgramCache]: Analyzing trace with hash 832504717, now seen corresponding path program 35 times [2019-12-27 19:16:46,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:46,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955290055] [2019-12-27 19:16:46,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:46,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955290055] [2019-12-27 19:16:46,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873858211] [2019-12-27 19:16:46,463 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 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 [2019-12-27 19:16:46,504 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:46,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:46,505 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:46,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:46,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:46,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:46,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [113806929] [2019-12-27 19:16:46,582 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:46,583 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:46,584 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:46,584 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:46,584 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:46,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:46,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:46,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:46,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:46,585 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:46,743 INFO L93 Difference]: Finished difference Result 130 states and 282 transitions. [2019-12-27 19:16:46,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:46,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:46,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:46,745 INFO L225 Difference]: With dead ends: 130 [2019-12-27 19:16:46,745 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 19:16:46,746 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:46,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 19:16:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2019-12-27 19:16:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:16:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 19:16:46,749 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 19:16:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:46,749 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 19:16:46,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 19:16:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:46,749 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:46,750 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:46,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:46,952 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:46,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:46,953 INFO L82 PathProgramCache]: Analyzing trace with hash 832507507, now seen corresponding path program 36 times [2019-12-27 19:16:46,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:46,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372694777] [2019-12-27 19:16:46,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:47,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372694777] [2019-12-27 19:16:47,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282221086] [2019-12-27 19:16:47,025 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 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 [2019-12-27 19:16:47,063 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:47,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:47,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:47,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:47,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:47,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:47,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1296978187] [2019-12-27 19:16:47,156 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:47,156 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:47,158 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:47,158 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:47,158 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:47,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:47,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:47,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:47,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:47,159 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 19:16:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:47,333 INFO L93 Difference]: Finished difference Result 130 states and 279 transitions. [2019-12-27 19:16:47,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:47,333 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:47,334 INFO L225 Difference]: With dead ends: 130 [2019-12-27 19:16:47,334 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 19:16:47,334 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 19:16:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2019-12-27 19:16:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:16:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 19:16:47,336 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 19:16:47,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:47,336 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 19:16:47,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 19:16:47,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:47,337 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:47,337 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:47,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:47,540 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:47,540 INFO L82 PathProgramCache]: Analyzing trace with hash 832507600, now seen corresponding path program 37 times [2019-12-27 19:16:47,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:47,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86522734] [2019-12-27 19:16:47,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:47,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86522734] [2019-12-27 19:16:47,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741272063] [2019-12-27 19:16:47,627 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 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 [2019-12-27 19:16:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:47,668 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:47,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:47,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:47,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:47,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2012342803] [2019-12-27 19:16:47,758 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:47,759 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:47,760 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:47,760 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:47,760 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:47,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:47,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:47,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:47,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:47,761 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 19:16:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:47,893 INFO L93 Difference]: Finished difference Result 127 states and 273 transitions. [2019-12-27 19:16:47,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:47,894 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:47,895 INFO L225 Difference]: With dead ends: 127 [2019-12-27 19:16:47,895 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 19:16:47,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 19:16:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102. [2019-12-27 19:16:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:47,899 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:47,899 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:47,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:47,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:47,899 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:47,899 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:48,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:48,102 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:48,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2046775021, now seen corresponding path program 38 times [2019-12-27 19:16:48,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:48,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782440033] [2019-12-27 19:16:48,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:48,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782440033] [2019-12-27 19:16:48,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257443860] [2019-12-27 19:16:48,173 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 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 [2019-12-27 19:16:48,215 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:48,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:48,216 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:48,217 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:48,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:48,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:48,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1911069710] [2019-12-27 19:16:48,303 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:48,304 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:48,306 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 26 transitions. [2019-12-27 19:16:48,306 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:48,314 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:16:48,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:48,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:48,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:48,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:48,315 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:48,468 INFO L93 Difference]: Finished difference Result 124 states and 264 transitions. [2019-12-27 19:16:48,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:48,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:48,470 INFO L225 Difference]: With dead ends: 124 [2019-12-27 19:16:48,470 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 19:16:48,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 19:16:48,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2019-12-27 19:16:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 19:16:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 19:16:48,474 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 19:16:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:48,474 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 19:16:48,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 19:16:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:48,475 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:48,475 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:48,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:48,679 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:48,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:48,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2046772231, now seen corresponding path program 39 times [2019-12-27 19:16:48,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:48,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233507774] [2019-12-27 19:16:48,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:48,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233507774] [2019-12-27 19:16:48,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266789361] [2019-12-27 19:16:48,746 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 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 [2019-12-27 19:16:48,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:48,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:48,790 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:48,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:49,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:49,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:49,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [370641966] [2019-12-27 19:16:49,680 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:49,681 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:49,682 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:49,682 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:49,684 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:16:49,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:49,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:49,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:49,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=133, Unknown=1, NotChecked=0, Total=182 [2019-12-27 19:16:49,685 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 19:16:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:50,322 INFO L93 Difference]: Finished difference Result 129 states and 272 transitions. [2019-12-27 19:16:50,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:50,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:50,324 INFO L225 Difference]: With dead ends: 129 [2019-12-27 19:16:50,324 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 19:16:50,325 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=237, Unknown=2, NotChecked=0, Total=342 [2019-12-27 19:16:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 19:16:50,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2019-12-27 19:16:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:50,328 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:50,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:50,328 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:50,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:50,329 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:50,329 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:50,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:50,531 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:50,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2046772138, now seen corresponding path program 40 times [2019-12-27 19:16:50,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:50,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017411169] [2019-12-27 19:16:50,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:50,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017411169] [2019-12-27 19:16:50,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776632872] [2019-12-27 19:16:50,595 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 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 [2019-12-27 19:16:50,636 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:50,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:50,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:50,637 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:50,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:50,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:50,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [775333927] [2019-12-27 19:16:50,723 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:50,724 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:50,725 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:50,725 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:50,726 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:16:50,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:50,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:50,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:50,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:50,727 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:50,875 INFO L93 Difference]: Finished difference Result 127 states and 270 transitions. [2019-12-27 19:16:50,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:50,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:50,877 INFO L225 Difference]: With dead ends: 127 [2019-12-27 19:16:50,877 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 19:16:50,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 19:16:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2019-12-27 19:16:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 19:16:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2019-12-27 19:16:50,881 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 12 [2019-12-27 19:16:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:50,881 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2019-12-27 19:16:50,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2019-12-27 19:16:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:50,882 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:50,882 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:51,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:51,085 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:51,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:51,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2046685741, now seen corresponding path program 41 times [2019-12-27 19:16:51,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:51,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333064029] [2019-12-27 19:16:51,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:51,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333064029] [2019-12-27 19:16:51,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124116939] [2019-12-27 19:16:51,153 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 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 [2019-12-27 19:16:51,195 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:51,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:51,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:51,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:51,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:51,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:51,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1317692255] [2019-12-27 19:16:51,317 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:51,317 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:51,319 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 19:16:51,319 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:51,320 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:51,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:51,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:51,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:51,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:51,320 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand 8 states. [2019-12-27 19:16:51,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:51,494 INFO L93 Difference]: Finished difference Result 135 states and 284 transitions. [2019-12-27 19:16:51,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:51,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:51,495 INFO L225 Difference]: With dead ends: 135 [2019-12-27 19:16:51,495 INFO L226 Difference]: Without dead ends: 134 [2019-12-27 19:16:51,496 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-27 19:16:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 102. [2019-12-27 19:16:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:51,498 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:51,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:51,499 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:51,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:51,499 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:51,500 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:51,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:51,703 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:51,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:51,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2046685648, now seen corresponding path program 42 times [2019-12-27 19:16:51,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:51,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633743438] [2019-12-27 19:16:51,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:51,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633743438] [2019-12-27 19:16:51,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064469396] [2019-12-27 19:16:51,767 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 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 [2019-12-27 19:16:51,808 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:51,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:51,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:51,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:51,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:51,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:51,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1314574814] [2019-12-27 19:16:51,932 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:51,934 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:51,935 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 19:16:51,936 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:51,936 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:51,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:51,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:51,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:51,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:51,937 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:52,124 INFO L93 Difference]: Finished difference Result 130 states and 276 transitions. [2019-12-27 19:16:52,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:52,125 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:52,126 INFO L225 Difference]: With dead ends: 130 [2019-12-27 19:16:52,126 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 19:16:52,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 19:16:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2019-12-27 19:16:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 19:16:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 19:16:52,129 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 19:16:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:52,129 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 19:16:52,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 19:16:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:52,130 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:52,130 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:52,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:52,331 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:52,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:52,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2046682858, now seen corresponding path program 43 times [2019-12-27 19:16:52,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:52,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184548050] [2019-12-27 19:16:52,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:52,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184548050] [2019-12-27 19:16:52,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305012945] [2019-12-27 19:16:52,393 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 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 [2019-12-27 19:16:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:52,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:52,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:52,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:52,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:52,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1424138869] [2019-12-27 19:16:52,543 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:52,545 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:52,546 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 19:16:52,546 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:52,547 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:52,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:52,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:52,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:52,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:52,547 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 19:16:52,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:52,729 INFO L93 Difference]: Finished difference Result 131 states and 277 transitions. [2019-12-27 19:16:52,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:52,729 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:52,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:52,730 INFO L225 Difference]: With dead ends: 131 [2019-12-27 19:16:52,730 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 19:16:52,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 19:16:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2019-12-27 19:16:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:52,733 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:52,733 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:52,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:52,734 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:52,734 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:52,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:52,937 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2046682765, now seen corresponding path program 44 times [2019-12-27 19:16:52,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:52,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641931805] [2019-12-27 19:16:52,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:53,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641931805] [2019-12-27 19:16:53,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385189878] [2019-12-27 19:16:53,010 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 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 [2019-12-27 19:16:53,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:53,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:53,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:53,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:53,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:53,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:53,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [303329200] [2019-12-27 19:16:53,155 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:53,156 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:53,157 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 19:16:53,158 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:53,158 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:53,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:53,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:53,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:53,159 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:53,309 INFO L93 Difference]: Finished difference Result 125 states and 265 transitions. [2019-12-27 19:16:53,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:53,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:53,310 INFO L225 Difference]: With dead ends: 125 [2019-12-27 19:16:53,310 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 19:16:53,311 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 19:16:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2019-12-27 19:16:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 19:16:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 217 transitions. [2019-12-27 19:16:53,314 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 217 transitions. Word has length 12 [2019-12-27 19:16:53,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:53,314 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 217 transitions. [2019-12-27 19:16:53,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:53,314 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 217 transitions. [2019-12-27 19:16:53,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:53,314 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:53,315 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:53,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:53,515 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:53,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2044004551, now seen corresponding path program 45 times [2019-12-27 19:16:53,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:53,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213305454] [2019-12-27 19:16:53,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:53,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213305454] [2019-12-27 19:16:53,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651641306] [2019-12-27 19:16:53,575 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 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 [2019-12-27 19:16:53,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:53,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:53,619 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:53,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:53,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:53,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:53,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [211412669] [2019-12-27 19:16:53,732 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:53,733 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:53,734 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:53,734 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:53,735 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:53,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:53,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:53,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:53,736 INFO L87 Difference]: Start difference. First operand 99 states and 217 transitions. Second operand 8 states. [2019-12-27 19:16:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:53,871 INFO L93 Difference]: Finished difference Result 123 states and 260 transitions. [2019-12-27 19:16:53,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:53,871 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:53,873 INFO L225 Difference]: With dead ends: 123 [2019-12-27 19:16:53,873 INFO L226 Difference]: Without dead ends: 122 [2019-12-27 19:16:53,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:53,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-12-27 19:16:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2019-12-27 19:16:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:53,876 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:53,877 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:53,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:53,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:53,878 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:53,878 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:54,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:54,079 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:54,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2044004458, now seen corresponding path program 46 times [2019-12-27 19:16:54,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:54,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308650076] [2019-12-27 19:16:54,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:54,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308650076] [2019-12-27 19:16:54,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407864079] [2019-12-27 19:16:54,144 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 19:16:54,181 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:54,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:54,182 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:54,183 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:54,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:54,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:54,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1909365262] [2019-12-27 19:16:54,271 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:54,272 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:54,273 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:54,273 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:54,274 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:54,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:54,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:54,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:54,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:54,274 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:54,433 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2019-12-27 19:16:54,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:54,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:54,435 INFO L225 Difference]: With dead ends: 132 [2019-12-27 19:16:54,435 INFO L226 Difference]: Without dead ends: 131 [2019-12-27 19:16:54,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-27 19:16:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2019-12-27 19:16:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 19:16:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 19:16:54,438 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 19:16:54,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:54,439 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 19:16:54,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 19:16:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:54,439 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:54,439 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:54,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:54,643 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:54,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2044001668, now seen corresponding path program 47 times [2019-12-27 19:16:54,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:54,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174508367] [2019-12-27 19:16:54,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:54,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174508367] [2019-12-27 19:16:54,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778524255] [2019-12-27 19:16:54,707 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 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 [2019-12-27 19:16:54,752 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:54,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:54,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:54,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:54,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:54,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:54,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1635371889] [2019-12-27 19:16:54,829 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:54,830 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:54,831 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:54,831 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:54,832 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:54,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:54,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:54,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:54,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:54,832 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 19:16:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:54,985 INFO L93 Difference]: Finished difference Result 129 states and 272 transitions. [2019-12-27 19:16:54,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:54,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:54,987 INFO L225 Difference]: With dead ends: 129 [2019-12-27 19:16:54,987 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 19:16:54,987 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 19:16:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2019-12-27 19:16:54,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:54,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:54,991 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:54,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:54,991 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:54,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:54,992 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:54,992 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:54,992 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:55,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:55,195 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:55,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2044001575, now seen corresponding path program 48 times [2019-12-27 19:16:55,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:55,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901380538] [2019-12-27 19:16:55,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:55,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901380538] [2019-12-27 19:16:55,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357574045] [2019-12-27 19:16:55,264 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 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 [2019-12-27 19:16:55,310 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:55,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:55,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:55,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:55,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:55,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:55,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1202608390] [2019-12-27 19:16:55,386 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:55,387 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:55,388 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:55,388 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:55,389 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:55,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:55,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:55,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:55,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:55,389 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:55,535 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2019-12-27 19:16:55,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:55,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:55,537 INFO L225 Difference]: With dead ends: 132 [2019-12-27 19:16:55,537 INFO L226 Difference]: Without dead ends: 131 [2019-12-27 19:16:55,537 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-27 19:16:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 100. [2019-12-27 19:16:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 19:16:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2019-12-27 19:16:55,541 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 12 [2019-12-27 19:16:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:55,541 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2019-12-27 19:16:55,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2019-12-27 19:16:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:55,542 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:55,542 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:55,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:55,745 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:55,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2043915178, now seen corresponding path program 49 times [2019-12-27 19:16:55,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:55,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881693449] [2019-12-27 19:16:55,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:55,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881693449] [2019-12-27 19:16:55,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56587646] [2019-12-27 19:16:55,805 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 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 [2019-12-27 19:16:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:55,850 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:55,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:55,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:55,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:55,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [498842211] [2019-12-27 19:16:55,923 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:55,924 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:55,925 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:55,926 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:55,926 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:55,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:55,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:55,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:55,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:55,927 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand 8 states. [2019-12-27 19:16:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:56,062 INFO L93 Difference]: Finished difference Result 126 states and 266 transitions. [2019-12-27 19:16:56,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:56,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:56,064 INFO L225 Difference]: With dead ends: 126 [2019-12-27 19:16:56,064 INFO L226 Difference]: Without dead ends: 125 [2019-12-27 19:16:56,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-27 19:16:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2019-12-27 19:16:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:56,068 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:56,068 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:56,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:56,068 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:56,069 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:56,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:56,272 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:56,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:56,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2043915085, now seen corresponding path program 50 times [2019-12-27 19:16:56,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:56,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885592270] [2019-12-27 19:16:56,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:56,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885592270] [2019-12-27 19:16:56,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371169671] [2019-12-27 19:16:56,354 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 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 [2019-12-27 19:16:56,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:56,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:56,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:56,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:57,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:57,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:57,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1899175917] [2019-12-27 19:16:57,694 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:57,695 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:57,696 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:57,696 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:57,697 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:57,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:57,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:57,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:57,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=132, Unknown=1, NotChecked=0, Total=182 [2019-12-27 19:16:57,698 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:57,885 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2019-12-27 19:16:57,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:57,885 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:57,886 INFO L225 Difference]: With dead ends: 132 [2019-12-27 19:16:57,887 INFO L226 Difference]: Without dead ends: 131 [2019-12-27 19:16:57,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=268, Unknown=1, NotChecked=0, Total=380 [2019-12-27 19:16:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-27 19:16:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2019-12-27 19:16:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 19:16:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 19:16:57,890 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 19:16:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:57,891 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 19:16:57,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 19:16:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:57,891 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:57,892 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:58,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:58,094 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:58,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2043912295, now seen corresponding path program 51 times [2019-12-27 19:16:58,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:58,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170488137] [2019-12-27 19:16:58,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:58,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170488137] [2019-12-27 19:16:58,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338796004] [2019-12-27 19:16:58,157 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 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 [2019-12-27 19:16:58,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:58,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:58,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:58,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:58,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:58,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:58,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [463778697] [2019-12-27 19:16:58,279 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:58,281 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:58,282 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:58,282 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:58,282 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:58,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:58,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:58,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:58,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:58,283 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 19:16:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:58,439 INFO L93 Difference]: Finished difference Result 124 states and 261 transitions. [2019-12-27 19:16:58,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:58,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:58,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:58,441 INFO L225 Difference]: With dead ends: 124 [2019-12-27 19:16:58,441 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 19:16:58,441 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:58,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 19:16:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 102. [2019-12-27 19:16:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:58,445 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:58,445 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:58,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:58,446 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:58,446 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:58,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:58,649 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:58,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2043912202, now seen corresponding path program 52 times [2019-12-27 19:16:58,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:58,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039598535] [2019-12-27 19:16:58,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:58,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039598535] [2019-12-27 19:16:58,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89037502] [2019-12-27 19:16:58,712 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 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 [2019-12-27 19:16:58,754 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:58,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:58,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:58,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:58,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:58,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:58,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2088038635] [2019-12-27 19:16:58,837 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:58,838 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:58,839 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:58,839 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:58,840 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:58,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:58,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:58,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:58,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:58,840 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:58,968 INFO L93 Difference]: Finished difference Result 120 states and 251 transitions. [2019-12-27 19:16:58,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:58,969 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:58,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:58,970 INFO L225 Difference]: With dead ends: 120 [2019-12-27 19:16:58,970 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 19:16:58,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:58,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 19:16:58,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 100. [2019-12-27 19:16:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 19:16:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2019-12-27 19:16:58,974 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 12 [2019-12-27 19:16:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:58,974 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2019-12-27 19:16:58,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2019-12-27 19:16:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:58,975 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:58,975 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:59,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:59,178 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:59,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:59,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1303876718, now seen corresponding path program 6 times [2019-12-27 19:16:59,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:59,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177804482] [2019-12-27 19:16:59,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:59,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177804482] [2019-12-27 19:16:59,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970559346] [2019-12-27 19:16:59,260 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 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 [2019-12-27 19:16:59,316 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:16:59,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:59,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:59,317 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:59,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:59,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:16:59,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [878816555] [2019-12-27 19:16:59,457 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:59,458 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:59,459 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 13 states and 12 transitions. [2019-12-27 19:16:59,459 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:59,460 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:59,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:16:59,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:59,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:16:59,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:59,461 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand 9 states. [2019-12-27 19:16:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:59,625 INFO L93 Difference]: Finished difference Result 120 states and 256 transitions. [2019-12-27 19:16:59,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:59,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 19:16:59,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:59,626 INFO L225 Difference]: With dead ends: 120 [2019-12-27 19:16:59,626 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 19:16:59,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:16:59,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 19:16:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2019-12-27 19:16:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 19:16:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-27 19:16:59,629 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-27 19:16:59,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:59,629 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-27 19:16:59,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:16:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-27 19:16:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:16:59,630 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:59,630 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:59,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:59,834 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:59,834 INFO L82 PathProgramCache]: Analyzing trace with hash 576390728, now seen corresponding path program 7 times [2019-12-27 19:16:59,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:59,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638426172] [2019-12-27 19:16:59,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:59,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638426172] [2019-12-27 19:16:59,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499189963] [2019-12-27 19:16:59,911 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 19:16:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:59,952 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:16:59,953 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:00,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:00,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:17:00,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [375617826] [2019-12-27 19:17:00,073 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:00,074 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:00,076 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 45 transitions. [2019-12-27 19:17:00,076 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:00,077 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:00,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:17:00,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:00,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:17:00,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:17:00,078 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 10 states. [2019-12-27 19:17:00,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:00,275 INFO L93 Difference]: Finished difference Result 131 states and 276 transitions. [2019-12-27 19:17:00,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:00,275 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-27 19:17:00,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:00,277 INFO L225 Difference]: With dead ends: 131 [2019-12-27 19:17:00,277 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 19:17:00,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:17:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 19:17:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2019-12-27 19:17:00,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:17:00,280 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:17:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:00,280 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:17:00,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:17:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:17:00,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:00,281 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:00,281 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:00,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:00,482 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:00,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:00,482 INFO L82 PathProgramCache]: Analyzing trace with hash 550401506, now seen corresponding path program 53 times [2019-12-27 19:17:00,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:00,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143138061] [2019-12-27 19:17:00,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:00,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143138061] [2019-12-27 19:17:00,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520451590] [2019-12-27 19:17:00,553 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 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 [2019-12-27 19:17:00,594 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:00,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:00,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:00,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:00,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:00,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:00,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1312357448] [2019-12-27 19:17:00,711 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:00,712 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:00,714 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 49 transitions. [2019-12-27 19:17:00,714 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:00,714 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:00,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:00,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:00,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:00,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:00,715 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:17:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:00,909 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2019-12-27 19:17:00,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:00,910 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:00,911 INFO L225 Difference]: With dead ends: 138 [2019-12-27 19:17:00,911 INFO L226 Difference]: Without dead ends: 137 [2019-12-27 19:17:00,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-27 19:17:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2019-12-27 19:17:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:17:00,914 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:17:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:00,915 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:17:00,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:17:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:00,915 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:00,915 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:01,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:01,117 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash -230087137, now seen corresponding path program 54 times [2019-12-27 19:17:01,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:01,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157479464] [2019-12-27 19:17:01,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:01,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157479464] [2019-12-27 19:17:01,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678557212] [2019-12-27 19:17:01,202 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 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 [2019-12-27 19:17:01,265 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:01,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:01,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:01,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:01,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:01,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:01,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [531606030] [2019-12-27 19:17:01,455 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:01,456 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:01,461 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 19:17:01,461 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:01,461 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:01,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:01,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:01,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:01,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:01,462 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:17:01,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:01,651 INFO L93 Difference]: Finished difference Result 146 states and 312 transitions. [2019-12-27 19:17:01,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:01,651 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:01,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:01,653 INFO L225 Difference]: With dead ends: 146 [2019-12-27 19:17:01,653 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 19:17:01,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 19:17:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2019-12-27 19:17:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:17:01,655 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:17:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:01,655 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:17:01,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:17:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:01,656 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:01,656 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:01,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:01,857 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:01,857 INFO L82 PathProgramCache]: Analyzing trace with hash -230087044, now seen corresponding path program 55 times [2019-12-27 19:17:01,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:01,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206261557] [2019-12-27 19:17:01,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:01,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206261557] [2019-12-27 19:17:01,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655842214] [2019-12-27 19:17:01,949 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 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 [2019-12-27 19:17:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:01,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:01,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:03,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:03,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:03,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [422152993] [2019-12-27 19:17:03,004 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:03,006 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:03,009 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 19:17:03,009 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:03,009 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:03,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:03,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:03,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:03,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2019-12-27 19:17:03,009 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:17:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:03,675 INFO L93 Difference]: Finished difference Result 146 states and 312 transitions. [2019-12-27 19:17:03,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:03,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:03,677 INFO L225 Difference]: With dead ends: 146 [2019-12-27 19:17:03,677 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 19:17:03,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=136, Invalid=324, Unknown=2, NotChecked=0, Total=462 [2019-12-27 19:17:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 19:17:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2019-12-27 19:17:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:17:03,680 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:17:03,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:03,680 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:17:03,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:17:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:03,680 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:03,680 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:03,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:03,881 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568706, now seen corresponding path program 56 times [2019-12-27 19:17:03,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:03,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637902961] [2019-12-27 19:17:03,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:03,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637902961] [2019-12-27 19:17:03,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360745922] [2019-12-27 19:17:03,948 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 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 [2019-12-27 19:17:03,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:03,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:03,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:04,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:04,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:04,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:04,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1848427784] [2019-12-27 19:17:04,132 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:04,133 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:04,136 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 19:17:04,136 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:04,136 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:04,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:04,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:04,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:04,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:04,137 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:17:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:04,361 INFO L93 Difference]: Finished difference Result 149 states and 318 transitions. [2019-12-27 19:17:04,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:04,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:04,363 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:17:04,363 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:17:04,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:17:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-27 19:17:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:17:04,367 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:17:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:04,368 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:17:04,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:04,368 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:17:04,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:04,368 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:04,369 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:04,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:04,572 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:04,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568799, now seen corresponding path program 57 times [2019-12-27 19:17:04,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:04,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151888983] [2019-12-27 19:17:04,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:04,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151888983] [2019-12-27 19:17:04,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129790138] [2019-12-27 19:17:04,689 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 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 [2019-12-27 19:17:04,764 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:17:04,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:04,765 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:04,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:06,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:06,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:06,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1487910877] [2019-12-27 19:17:06,522 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:06,523 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:06,525 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 19:17:06,525 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:06,525 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:06,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:06,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:06,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:06,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:06,526 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:17:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:07,088 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 19:17:07,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:07,089 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:07,090 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:17:07,091 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:17:07,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=135, Invalid=326, Unknown=1, NotChecked=0, Total=462 [2019-12-27 19:17:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:17:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2019-12-27 19:17:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:17:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 19:17:07,099 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 19:17:07,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:07,099 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 19:17:07,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 19:17:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:07,100 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:07,100 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:07,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:07,303 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:07,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571589, now seen corresponding path program 58 times [2019-12-27 19:17:07,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:07,304 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727106760] [2019-12-27 19:17:07,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:07,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727106760] [2019-12-27 19:17:07,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712813219] [2019-12-27 19:17:07,374 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 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 [2019-12-27 19:17:07,415 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:07,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:07,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:07,416 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:09,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:09,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:09,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1279021555] [2019-12-27 19:17:09,095 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:09,096 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:09,098 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 19:17:09,098 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:09,098 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:09,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:09,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:09,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:09,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=177, Unknown=2, NotChecked=0, Total=240 [2019-12-27 19:17:09,099 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 19:17:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:09,336 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2019-12-27 19:17:09,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:09,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:09,338 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:17:09,338 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:17:09,338 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=134, Invalid=326, Unknown=2, NotChecked=0, Total=462 [2019-12-27 19:17:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:17:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 112. [2019-12-27 19:17:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:17:09,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 19:17:09,342 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 19:17:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:09,342 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 19:17:09,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 19:17:09,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:09,343 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:09,343 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:09,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:09,545 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:09,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571682, now seen corresponding path program 59 times [2019-12-27 19:17:09,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:09,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065229309] [2019-12-27 19:17:09,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:09,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065229309] [2019-12-27 19:17:09,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60198245] [2019-12-27 19:17:09,660 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 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 [2019-12-27 19:17:09,711 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:09,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:09,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:09,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:10,712 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_189 Int)) (and (<= (div (+ (* v_~i~0_189 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ v_~i~0_189 (* 2 c_~j~0))) (<= c_~j~0 (+ v_~i~0_189 1)))) is different from true [2019-12-27 19:17:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:10,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:10,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:10,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [535671717] [2019-12-27 19:17:10,714 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:10,714 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:10,716 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 19:17:10,716 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:10,716 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:10,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:10,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:10,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:10,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=154, Unknown=1, NotChecked=26, Total=240 [2019-12-27 19:17:10,717 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 19:17:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:11,781 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 19:17:11,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:11,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:11,783 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:17:11,783 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:17:11,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=134, Invalid=287, Unknown=3, NotChecked=38, Total=462 [2019-12-27 19:17:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:17:11,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-27 19:17:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:17:11,787 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:17:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:11,787 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:17:11,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:17:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:11,788 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:11,788 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:11,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:11,990 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:11,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1380707713, now seen corresponding path program 60 times [2019-12-27 19:17:11,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:11,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719519678] [2019-12-27 19:17:11,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:12,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719519678] [2019-12-27 19:17:12,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039999477] [2019-12-27 19:17:12,057 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 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 [2019-12-27 19:17:12,100 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:12,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:12,101 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:12,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:12,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:12,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:12,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2115764518] [2019-12-27 19:17:12,225 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:12,226 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:12,227 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:12,228 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:12,228 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:12,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:12,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:12,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:12,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:12,228 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:17:12,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:12,401 INFO L93 Difference]: Finished difference Result 147 states and 313 transitions. [2019-12-27 19:17:12,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:12,401 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:12,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:12,402 INFO L225 Difference]: With dead ends: 147 [2019-12-27 19:17:12,403 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 19:17:12,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 19:17:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2019-12-27 19:17:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:17:12,405 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:17:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:12,406 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:17:12,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:17:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:12,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:12,407 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:12,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:12,610 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:12,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1380707620, now seen corresponding path program 61 times [2019-12-27 19:17:12,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:12,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919349702] [2019-12-27 19:17:12,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:12,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919349702] [2019-12-27 19:17:12,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332216689] [2019-12-27 19:17:12,675 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 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 [2019-12-27 19:17:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:12,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:12,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:12,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:12,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:12,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1266085899] [2019-12-27 19:17:12,909 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:12,911 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:12,924 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:12,925 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:12,925 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:12,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:12,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:12,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:12,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:12,926 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:17:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:13,205 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 19:17:13,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:13,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:13,208 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:17:13,208 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:17:13,208 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:13,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:17:13,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 113. [2019-12-27 19:17:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 19:17:13,212 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 19:17:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:13,213 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 19:17:13,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 19:17:13,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:13,214 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:13,214 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:13,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:13,417 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704830, now seen corresponding path program 62 times [2019-12-27 19:17:13,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:13,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577639055] [2019-12-27 19:17:13,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:13,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577639055] [2019-12-27 19:17:13,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125092807] [2019-12-27 19:17:13,540 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 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 [2019-12-27 19:17:13,612 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:13,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:13,613 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:13,615 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:13,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:13,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:13,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1449010625] [2019-12-27 19:17:13,818 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:13,819 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:13,822 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:13,822 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:13,822 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:13,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:13,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:13,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:13,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:13,823 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 19:17:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:14,086 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 19:17:14,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:14,087 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:14,088 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:14,088 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:14,089 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:17:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2019-12-27 19:17:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 19:17:14,091 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 19:17:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:14,091 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 19:17:14,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 19:17:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:14,092 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:14,092 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:14,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:14,293 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:14,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:14,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704737, now seen corresponding path program 63 times [2019-12-27 19:17:14,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:14,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10731757] [2019-12-27 19:17:14,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:14,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10731757] [2019-12-27 19:17:14,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591206085] [2019-12-27 19:17:14,376 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 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 [2019-12-27 19:17:14,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:17:14,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:14,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:14,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:14,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:14,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:14,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1784115988] [2019-12-27 19:17:14,708 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:14,710 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:14,713 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:14,713 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:14,714 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:14,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:14,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:14,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:14,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:14,715 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 19:17:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:14,967 INFO L93 Difference]: Finished difference Result 151 states and 326 transitions. [2019-12-27 19:17:14,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:14,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:14,968 INFO L225 Difference]: With dead ends: 151 [2019-12-27 19:17:14,969 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 19:17:14,969 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 19:17:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2019-12-27 19:17:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:17:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 19:17:14,971 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 19:17:14,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:14,971 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 19:17:14,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 19:17:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:14,972 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:14,972 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:15,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:15,173 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:15,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618340, now seen corresponding path program 64 times [2019-12-27 19:17:15,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:15,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037195264] [2019-12-27 19:17:15,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:15,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037195264] [2019-12-27 19:17:15,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198590185] [2019-12-27 19:17:15,241 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 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 [2019-12-27 19:17:15,282 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:15,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:15,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:15,284 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:15,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:15,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:15,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1475419130] [2019-12-27 19:17:15,433 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:15,434 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:15,436 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:15,437 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:15,437 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:15,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:15,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:15,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:15,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:15,437 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 19:17:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:15,652 INFO L93 Difference]: Finished difference Result 152 states and 324 transitions. [2019-12-27 19:17:15,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:15,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:15,654 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:17:15,654 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:17:15,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:17:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2019-12-27 19:17:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:17:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 19:17:15,657 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 19:17:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:15,658 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 19:17:15,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 19:17:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:15,658 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:15,658 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:15,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:15,859 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618247, now seen corresponding path program 65 times [2019-12-27 19:17:15,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:15,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088935279] [2019-12-27 19:17:15,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:15,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088935279] [2019-12-27 19:17:15,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817924227] [2019-12-27 19:17:15,950 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 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 [2019-12-27 19:17:16,014 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:16,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:16,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:16,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:16,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:16,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:16,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [128662200] [2019-12-27 19:17:16,300 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:16,301 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:16,304 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:16,304 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:16,304 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:16,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:16,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:16,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:16,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:16,305 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 19:17:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:16,565 INFO L93 Difference]: Finished difference Result 152 states and 327 transitions. [2019-12-27 19:17:16,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:16,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:16,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:16,566 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:17:16,566 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:17:16,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:16,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:17:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 113. [2019-12-27 19:17:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 19:17:16,569 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 19:17:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:16,570 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 19:17:16,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 19:17:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:16,571 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:16,571 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:16,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:16,775 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:16,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:16,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1380615457, now seen corresponding path program 66 times [2019-12-27 19:17:16,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:16,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373236956] [2019-12-27 19:17:16,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:16,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373236956] [2019-12-27 19:17:16,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196901504] [2019-12-27 19:17:16,851 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 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 [2019-12-27 19:17:16,893 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:16,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:16,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:16,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:19,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:19,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:19,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1840119025] [2019-12-27 19:17:19,110 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:19,111 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:19,113 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:19,113 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:19,113 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:19,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:19,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:19,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:19,114 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 19:17:19,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:19,350 INFO L93 Difference]: Finished difference Result 153 states and 328 transitions. [2019-12-27 19:17:19,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:19,350 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:19,352 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:19,352 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:19,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:19,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2019-12-27 19:17:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 19:17:19,355 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 19:17:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:19,356 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 19:17:19,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 19:17:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:19,356 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:19,356 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:19,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:19,559 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:19,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1380615364, now seen corresponding path program 67 times [2019-12-27 19:17:19,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:19,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076306697] [2019-12-27 19:17:19,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:19,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076306697] [2019-12-27 19:17:19,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529607304] [2019-12-27 19:17:19,650 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 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 [2019-12-27 19:17:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:19,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:19,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:19,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:19,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:19,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1838600692] [2019-12-27 19:17:19,853 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:19,853 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:19,856 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:19,856 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:19,856 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:19,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:19,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:19,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:19,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:19,857 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 19:17:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:20,071 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 19:17:20,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:20,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:20,072 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:17:20,073 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:17:20,073 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:17:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-27 19:17:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:17:20,076 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:17:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:20,076 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:17:20,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:17:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:20,076 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:20,076 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:20,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:20,277 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:20,278 INFO L82 PathProgramCache]: Analyzing trace with hash 35069218, now seen corresponding path program 68 times [2019-12-27 19:17:20,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:20,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10807256] [2019-12-27 19:17:20,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:20,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10807256] [2019-12-27 19:17:20,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471643114] [2019-12-27 19:17:20,355 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 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 [2019-12-27 19:17:20,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:20,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:20,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:20,421 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:20,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:20,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:20,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1423093867] [2019-12-27 19:17:20,518 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:20,519 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:20,521 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:20,521 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:20,521 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:20,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:20,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:20,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:20,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:20,522 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:17:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:20,689 INFO L93 Difference]: Finished difference Result 141 states and 298 transitions. [2019-12-27 19:17:20,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:20,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:20,691 INFO L225 Difference]: With dead ends: 141 [2019-12-27 19:17:20,691 INFO L226 Difference]: Without dead ends: 140 [2019-12-27 19:17:20,691 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-12-27 19:17:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2019-12-27 19:17:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:20,694 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:20,694 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:20,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:20,694 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:20,695 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:20,695 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:20,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:20,898 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:20,898 INFO L82 PathProgramCache]: Analyzing trace with hash 35069311, now seen corresponding path program 69 times [2019-12-27 19:17:20,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:20,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978214481] [2019-12-27 19:17:20,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:20,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978214481] [2019-12-27 19:17:20,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051648727] [2019-12-27 19:17:20,967 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 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 [2019-12-27 19:17:21,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:17:21,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:21,008 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:21,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:21,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:21,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:21,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [195124489] [2019-12-27 19:17:21,109 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:21,109 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:21,111 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:21,111 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:21,111 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:21,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:21,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:21,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:21,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:21,112 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:21,318 INFO L93 Difference]: Finished difference Result 150 states and 319 transitions. [2019-12-27 19:17:21,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:21,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:21,320 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:17:21,320 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:17:21,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:17:21,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2019-12-27 19:17:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:21,324 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:21,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:21,324 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:21,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:21,324 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:21,324 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:21,325 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:21,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:21,527 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash 35072101, now seen corresponding path program 70 times [2019-12-27 19:17:21,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:21,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838740474] [2019-12-27 19:17:21,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:21,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838740474] [2019-12-27 19:17:21,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519188414] [2019-12-27 19:17:21,599 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:21,641 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:21,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:21,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:21,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:22,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:22,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:22,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [581851823] [2019-12-27 19:17:22,132 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:22,133 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:22,134 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:22,134 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:22,134 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:22,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:22,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:22,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:22,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2019-12-27 19:17:22,135 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:22,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:22,415 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 19:17:22,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:17:22,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:22,421 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:22,421 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:22,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=398, Unknown=1, NotChecked=0, Total=552 [2019-12-27 19:17:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 117. [2019-12-27 19:17:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:22,424 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:22,424 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:22,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:22,425 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:22,425 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:22,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:22,629 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash 35072194, now seen corresponding path program 71 times [2019-12-27 19:17:22,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:22,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522208412] [2019-12-27 19:17:22,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:22,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522208412] [2019-12-27 19:17:22,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843213781] [2019-12-27 19:17:22,703 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:22,742 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:22,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:22,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:22,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:22,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:22,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:22,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [267564794] [2019-12-27 19:17:22,840 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:22,841 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:22,844 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:22,844 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:22,844 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:22,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:22,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:22,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:22,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:22,844 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:23,040 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 19:17:23,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:23,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:23,042 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:23,042 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:23,042 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2019-12-27 19:17:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:17:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 19:17:23,045 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 19:17:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:23,045 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 19:17:23,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:23,046 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 19:17:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:23,046 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:23,046 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:23,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:23,247 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:23,248 INFO L82 PathProgramCache]: Analyzing trace with hash 35158591, now seen corresponding path program 72 times [2019-12-27 19:17:23,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:23,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805113396] [2019-12-27 19:17:23,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:23,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805113396] [2019-12-27 19:17:23,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564606009] [2019-12-27 19:17:23,316 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:23,359 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:23,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:23,360 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:23,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:23,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:23,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:23,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1211726191] [2019-12-27 19:17:23,520 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:23,521 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:23,523 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:23,523 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:23,524 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:23,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:23,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:23,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:23,524 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 19:17:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:23,800 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 19:17:23,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:23,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:23,802 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:23,802 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:23,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:17:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2019-12-27 19:17:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:17:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 19:17:23,805 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 19:17:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:23,806 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 19:17:23,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 19:17:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:23,806 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:23,806 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:24,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:24,007 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:24,008 INFO L82 PathProgramCache]: Analyzing trace with hash 35158684, now seen corresponding path program 73 times [2019-12-27 19:17:24,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:24,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413854277] [2019-12-27 19:17:24,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:24,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413854277] [2019-12-27 19:17:24,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712133220] [2019-12-27 19:17:24,093 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:24,136 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:24,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:24,650 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_208 Int)) (and (<= c_~j~0 (+ (* 2 v_~j~0_208) 2)) (<= c_~i~0 (+ v_~j~0_208 c_~j~0 2)) (<= (div (+ (* v_~j~0_208 (- 1)) 1) (- 2)) 2))) is different from true [2019-12-27 19:17:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:24,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:24,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:24,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [407344056] [2019-12-27 19:17:24,651 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:24,652 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:24,653 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:24,653 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:24,654 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:24,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:24,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:24,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:24,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=154, Unknown=1, NotChecked=26, Total=240 [2019-12-27 19:17:24,654 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 19:17:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:24,889 INFO L93 Difference]: Finished difference Result 154 states and 332 transitions. [2019-12-27 19:17:24,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:24,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:24,891 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:24,891 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:24,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=324, Unknown=1, NotChecked=40, Total=506 [2019-12-27 19:17:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 117. [2019-12-27 19:17:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:24,894 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:24,894 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:24,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:24,895 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:24,895 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:25,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:25,096 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:25,096 INFO L82 PathProgramCache]: Analyzing trace with hash 35161474, now seen corresponding path program 74 times [2019-12-27 19:17:25,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:25,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395102272] [2019-12-27 19:17:25,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:25,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395102272] [2019-12-27 19:17:25,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128596895] [2019-12-27 19:17:25,164 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:25,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:25,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:25,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:25,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:25,941 WARN L192 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 19:17:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:25,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:25,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:25,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1847347405] [2019-12-27 19:17:25,944 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:25,944 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:25,946 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:25,946 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:25,946 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:25,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:25,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:25,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:25,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:25,947 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:26,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:26,213 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2019-12-27 19:17:26,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:26,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:26,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:26,215 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:17:26,215 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:17:26,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:17:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:17:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 117. [2019-12-27 19:17:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:26,218 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:26,218 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:26,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:26,219 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:26,219 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:26,219 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:26,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:26,420 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash 35161567, now seen corresponding path program 75 times [2019-12-27 19:17:26,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:26,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923402517] [2019-12-27 19:17:26,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:26,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923402517] [2019-12-27 19:17:26,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111392739] [2019-12-27 19:17:26,490 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:26,530 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:17:26,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:26,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:26,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:26,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:26,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:26,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [349940085] [2019-12-27 19:17:26,632 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:26,633 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:26,635 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:26,635 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:26,636 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:26,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:26,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:26,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:26,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:26,636 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:26,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:26,824 INFO L93 Difference]: Finished difference Result 153 states and 328 transitions. [2019-12-27 19:17:26,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:26,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:26,825 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:26,826 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:26,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:26,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2019-12-27 19:17:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:26,829 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:26,829 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:26,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:26,830 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:26,830 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:27,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:27,033 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:27,033 INFO L82 PathProgramCache]: Analyzing trace with hash 37839781, now seen corresponding path program 76 times [2019-12-27 19:17:27,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:27,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086668268] [2019-12-27 19:17:27,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:27,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086668268] [2019-12-27 19:17:27,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744666912] [2019-12-27 19:17:27,102 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:27,151 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:27,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:27,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:27,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:27,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:27,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:27,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [778523153] [2019-12-27 19:17:27,248 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:27,249 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:27,251 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:27,251 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:27,251 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:27,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:27,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:27,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:27,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:27,252 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:27,425 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2019-12-27 19:17:27,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:27,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:27,427 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:17:27,428 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:17:27,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:17:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 115. [2019-12-27 19:17:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:27,431 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:27,431 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:27,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:27,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:27,432 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:27,432 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:27,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:27,635 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:27,635 INFO L82 PathProgramCache]: Analyzing trace with hash 37839874, now seen corresponding path program 77 times [2019-12-27 19:17:27,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:27,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662616476] [2019-12-27 19:17:27,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:27,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662616476] [2019-12-27 19:17:27,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358734513] [2019-12-27 19:17:27,712 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:27,756 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:27,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:27,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:27,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:27,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:27,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:27,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1437235825] [2019-12-27 19:17:27,866 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:27,867 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:27,869 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:27,869 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:27,869 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:27,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:27,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:27,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:27,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:27,870 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:28,074 INFO L93 Difference]: Finished difference Result 151 states and 329 transitions. [2019-12-27 19:17:28,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:28,075 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:28,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:28,076 INFO L225 Difference]: With dead ends: 151 [2019-12-27 19:17:28,076 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 19:17:28,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 19:17:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 117. [2019-12-27 19:17:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:28,079 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:28,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:28,080 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:28,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:28,080 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:28,080 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:28,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:28,283 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:28,284 INFO L82 PathProgramCache]: Analyzing trace with hash 37842664, now seen corresponding path program 78 times [2019-12-27 19:17:28,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:28,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342077343] [2019-12-27 19:17:28,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:28,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342077343] [2019-12-27 19:17:28,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040112616] [2019-12-27 19:17:28,358 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:28,399 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:28,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:28,400 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:28,401 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:28,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:28,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:28,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2078987946] [2019-12-27 19:17:28,515 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:28,516 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:28,517 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:28,517 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:28,517 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:28,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:28,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:28,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:28,518 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:28,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:28,708 INFO L93 Difference]: Finished difference Result 153 states and 331 transitions. [2019-12-27 19:17:28,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:28,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:28,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:28,710 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:28,710 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:28,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 117. [2019-12-27 19:17:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:28,713 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:28,713 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:28,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:28,714 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:28,714 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:28,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:28,917 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:28,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:28,918 INFO L82 PathProgramCache]: Analyzing trace with hash 37842757, now seen corresponding path program 79 times [2019-12-27 19:17:28,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:28,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340827716] [2019-12-27 19:17:28,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:28,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340827716] [2019-12-27 19:17:28,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697863349] [2019-12-27 19:17:28,998 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:29,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:29,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:29,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:29,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:29,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [431207335] [2019-12-27 19:17:29,150 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:29,151 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:29,153 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:29,154 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:29,154 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:29,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:29,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:29,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:29,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:29,155 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:29,340 INFO L93 Difference]: Finished difference Result 151 states and 326 transitions. [2019-12-27 19:17:29,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:29,340 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:29,341 INFO L225 Difference]: With dead ends: 151 [2019-12-27 19:17:29,342 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 19:17:29,342 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:29,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 19:17:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 116. [2019-12-27 19:17:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:17:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 19:17:29,345 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 19:17:29,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:29,345 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 19:17:29,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 19:17:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:29,345 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:29,345 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:29,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:29,546 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:29,547 INFO L82 PathProgramCache]: Analyzing trace with hash 37929154, now seen corresponding path program 80 times [2019-12-27 19:17:29,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:29,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824346492] [2019-12-27 19:17:29,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:29,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824346492] [2019-12-27 19:17:29,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89501640] [2019-12-27 19:17:29,617 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:29,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:29,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:29,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:29,661 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:29,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:29,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:29,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [480564855] [2019-12-27 19:17:29,768 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:29,770 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:29,771 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:29,771 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:29,771 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:29,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:29,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:29,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:29,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:29,772 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 19:17:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:29,969 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2019-12-27 19:17:29,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:29,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:29,970 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:17:29,971 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:17:29,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:29,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:17:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 116. [2019-12-27 19:17:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:17:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 19:17:29,973 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 19:17:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:29,973 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 19:17:29,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 19:17:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:29,974 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:29,974 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:30,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:30,174 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash 37929247, now seen corresponding path program 81 times [2019-12-27 19:17:30,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:30,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298023538] [2019-12-27 19:17:30,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:30,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298023538] [2019-12-27 19:17:30,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205646212] [2019-12-27 19:17:30,246 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:30,287 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:17:30,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:30,288 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:30,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:30,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:30,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:30,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1945026703] [2019-12-27 19:17:30,852 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:30,853 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:30,854 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:30,854 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:30,855 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:30,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:30,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:30,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:30,857 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 19:17:31,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:31,400 INFO L93 Difference]: Finished difference Result 152 states and 330 transitions. [2019-12-27 19:17:31,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:31,401 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:31,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:31,402 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:17:31,402 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:17:31,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:17:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2019-12-27 19:17:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:31,405 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:31,405 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:31,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:31,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:31,406 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:31,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:31,608 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:31,609 INFO L82 PathProgramCache]: Analyzing trace with hash 37932037, now seen corresponding path program 82 times [2019-12-27 19:17:31,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:31,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675988913] [2019-12-27 19:17:31,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:31,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675988913] [2019-12-27 19:17:31,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135769891] [2019-12-27 19:17:31,687 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:31,729 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:31,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:31,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:31,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:31,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:31,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:31,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [239661126] [2019-12-27 19:17:31,843 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:31,844 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:31,846 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:31,846 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:31,846 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:31,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:31,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:31,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:31,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:31,847 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:32,054 INFO L93 Difference]: Finished difference Result 152 states and 327 transitions. [2019-12-27 19:17:32,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:32,055 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:32,056 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:17:32,056 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:17:32,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:17:32,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2019-12-27 19:17:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:32,059 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:32,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:32,059 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:32,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:32,060 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:32,060 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:32,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:32,261 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:32,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:32,261 INFO L82 PathProgramCache]: Analyzing trace with hash 37932130, now seen corresponding path program 83 times [2019-12-27 19:17:32,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:32,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247112717] [2019-12-27 19:17:32,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:32,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247112717] [2019-12-27 19:17:32,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434545083] [2019-12-27 19:17:32,342 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:32,385 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:32,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:32,386 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:32,387 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:32,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:32,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:32,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1840636624] [2019-12-27 19:17:32,490 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:32,491 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:32,493 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:32,493 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:32,493 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:32,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:32,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:32,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:32,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:32,494 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:32,659 INFO L93 Difference]: Finished difference Result 147 states and 316 transitions. [2019-12-27 19:17:32,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:32,659 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:32,660 INFO L225 Difference]: With dead ends: 147 [2019-12-27 19:17:32,660 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 19:17:32,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 19:17:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 115. [2019-12-27 19:17:32,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:32,663 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:32,663 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:32,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:32,664 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:32,664 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:32,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:32,867 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:32,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:32,867 INFO L82 PathProgramCache]: Analyzing trace with hash 974481212, now seen corresponding path program 84 times [2019-12-27 19:17:32,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:32,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895352112] [2019-12-27 19:17:32,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:32,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895352112] [2019-12-27 19:17:32,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811795696] [2019-12-27 19:17:32,939 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:32,984 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:32,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:32,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:32,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:33,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:33,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:33,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1334113833] [2019-12-27 19:17:33,088 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:33,089 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:33,091 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 29 transitions. [2019-12-27 19:17:33,091 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:33,093 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:17:33,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:33,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:33,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:33,093 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:33,288 INFO L93 Difference]: Finished difference Result 142 states and 302 transitions. [2019-12-27 19:17:33,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:33,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:33,290 INFO L225 Difference]: With dead ends: 142 [2019-12-27 19:17:33,290 INFO L226 Difference]: Without dead ends: 141 [2019-12-27 19:17:33,291 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-27 19:17:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2019-12-27 19:17:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:33,294 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:33,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:33,294 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:33,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:33,294 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:33,295 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:33,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:33,495 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:33,496 INFO L82 PathProgramCache]: Analyzing trace with hash 974484002, now seen corresponding path program 85 times [2019-12-27 19:17:33,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:33,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688708550] [2019-12-27 19:17:33,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:33,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688708550] [2019-12-27 19:17:33,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227502147] [2019-12-27 19:17:33,571 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:33,612 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:33,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:34,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:34,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:34,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [606381158] [2019-12-27 19:17:34,663 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:34,664 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:34,666 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 19:17:34,666 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:34,667 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:17:34,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:34,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:34,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:34,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2019-12-27 19:17:34,668 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:34,942 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 19:17:34,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:34,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:34,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:34,944 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:17:34,944 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:17:34,944 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=135, Invalid=326, Unknown=1, NotChecked=0, Total=462 [2019-12-27 19:17:34,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:17:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 115. [2019-12-27 19:17:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:34,947 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:34,948 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:34,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:34,948 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:34,948 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:35,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:35,149 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:35,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:35,149 INFO L82 PathProgramCache]: Analyzing trace with hash 974484095, now seen corresponding path program 86 times [2019-12-27 19:17:35,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:35,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991858159] [2019-12-27 19:17:35,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:35,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991858159] [2019-12-27 19:17:35,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900323206] [2019-12-27 19:17:35,224 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:35,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:35,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:35,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:35,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:35,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:35,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:35,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2139465040] [2019-12-27 19:17:35,373 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:35,374 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:35,376 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 19:17:35,377 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:35,378 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:17:35,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:35,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:35,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:35,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:35,378 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:35,566 INFO L93 Difference]: Finished difference Result 148 states and 314 transitions. [2019-12-27 19:17:35,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:35,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:35,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:35,568 INFO L225 Difference]: With dead ends: 148 [2019-12-27 19:17:35,568 INFO L226 Difference]: Without dead ends: 147 [2019-12-27 19:17:35,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-27 19:17:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 113. [2019-12-27 19:17:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 19:17:35,571 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 19:17:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:35,571 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 19:17:35,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 19:17:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:35,572 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:35,572 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:35,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:35,772 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:35,773 INFO L82 PathProgramCache]: Analyzing trace with hash 974570492, now seen corresponding path program 87 times [2019-12-27 19:17:35,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:35,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519485652] [2019-12-27 19:17:35,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:35,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519485652] [2019-12-27 19:17:35,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205495953] [2019-12-27 19:17:35,850 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:35,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:17:35,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:35,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:35,895 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:36,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:36,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:36,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [512091333] [2019-12-27 19:17:36,434 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:36,435 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:36,437 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:36,437 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:36,438 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:17:36,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:36,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2019-12-27 19:17:36,439 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 19:17:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:36,685 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2019-12-27 19:17:36,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:36,685 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:36,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:36,687 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:36,687 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:36,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=325, Unknown=1, NotChecked=0, Total=462 [2019-12-27 19:17:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2019-12-27 19:17:36,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:36,691 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:36,692 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:36,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:36,692 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:36,692 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:36,692 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:36,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:36,896 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:36,896 INFO L82 PathProgramCache]: Analyzing trace with hash 974570585, now seen corresponding path program 88 times [2019-12-27 19:17:36,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:36,897 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923036713] [2019-12-27 19:17:36,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:36,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923036713] [2019-12-27 19:17:36,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945366092] [2019-12-27 19:17:36,969 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:37,025 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:37,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:37,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:37,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:38,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:38,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:38,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1649913767] [2019-12-27 19:17:38,846 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:38,847 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:38,849 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:38,849 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:38,850 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:17:38,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:38,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=177, Unknown=3, NotChecked=0, Total=240 [2019-12-27 19:17:38,850 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:39,552 INFO L93 Difference]: Finished difference Result 154 states and 326 transitions. [2019-12-27 19:17:39,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:39,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:39,554 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:39,554 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:39,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=133, Invalid=325, Unknown=4, NotChecked=0, Total=462 [2019-12-27 19:17:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 114. [2019-12-27 19:17:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:39,560 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:39,560 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:39,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:39,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:39,561 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:39,561 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:39,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:39,765 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:39,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:39,766 INFO L82 PathProgramCache]: Analyzing trace with hash 974573375, now seen corresponding path program 89 times [2019-12-27 19:17:39,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:39,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542770924] [2019-12-27 19:17:39,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:39,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542770924] [2019-12-27 19:17:39,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308359378] [2019-12-27 19:17:39,835 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:39,876 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:39,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:39,877 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:39,878 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:40,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:40,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:40,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [638799055] [2019-12-27 19:17:40,772 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:40,773 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:40,774 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:40,775 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:40,775 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:17:40,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:40,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:40,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:40,776 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:40,997 INFO L93 Difference]: Finished difference Result 155 states and 327 transitions. [2019-12-27 19:17:40,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:40,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:40,999 INFO L225 Difference]: With dead ends: 155 [2019-12-27 19:17:40,999 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 19:17:40,999 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:41,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 19:17:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 115. [2019-12-27 19:17:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:41,002 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:41,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:41,002 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:41,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:41,003 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:41,003 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:41,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:41,204 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:41,204 INFO L82 PathProgramCache]: Analyzing trace with hash 974573468, now seen corresponding path program 90 times [2019-12-27 19:17:41,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:41,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909773244] [2019-12-27 19:17:41,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:41,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909773244] [2019-12-27 19:17:41,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147072755] [2019-12-27 19:17:41,277 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:41,319 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:17:41,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:41,320 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:41,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:41,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:41,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:41,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [267080512] [2019-12-27 19:17:41,432 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:41,434 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:41,435 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:41,435 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:41,436 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:17:41,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:41,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:41,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:41,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:41,437 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:41,619 INFO L93 Difference]: Finished difference Result 149 states and 315 transitions. [2019-12-27 19:17:41,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:41,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:41,620 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:17:41,621 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:17:41,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:17:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2019-12-27 19:17:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:17:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 247 transitions. [2019-12-27 19:17:41,624 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 247 transitions. Word has length 13 [2019-12-27 19:17:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:41,624 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 247 transitions. [2019-12-27 19:17:41,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 247 transitions. [2019-12-27 19:17:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:41,625 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:41,625 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:41,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:41,828 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:41,829 INFO L82 PathProgramCache]: Analyzing trace with hash 977251682, now seen corresponding path program 91 times [2019-12-27 19:17:41,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:41,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563020574] [2019-12-27 19:17:41,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:41,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563020574] [2019-12-27 19:17:41,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824243292] [2019-12-27 19:17:41,941 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:41,983 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:41,984 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:42,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:42,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:42,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [331074308] [2019-12-27 19:17:42,165 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:42,166 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:42,168 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:42,168 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:42,168 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:42,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:42,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:42,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:42,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:42,169 INFO L87 Difference]: Start difference. First operand 112 states and 247 transitions. Second operand 9 states. [2019-12-27 19:17:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:42,382 INFO L93 Difference]: Finished difference Result 159 states and 334 transitions. [2019-12-27 19:17:42,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:42,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:42,383 INFO L225 Difference]: With dead ends: 159 [2019-12-27 19:17:42,383 INFO L226 Difference]: Without dead ends: 158 [2019-12-27 19:17:42,384 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-27 19:17:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 115. [2019-12-27 19:17:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:42,387 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:42,388 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:42,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:42,388 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:42,388 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:42,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:42,591 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash 977251775, now seen corresponding path program 92 times [2019-12-27 19:17:42,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:42,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033414017] [2019-12-27 19:17:42,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:42,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033414017] [2019-12-27 19:17:42,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325486166] [2019-12-27 19:17:42,666 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:42,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:42,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:42,707 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:42,707 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:49,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:49,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:49,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1893809714] [2019-12-27 19:17:49,032 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:49,033 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:49,035 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:49,035 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:49,036 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:49,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:49,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:49,037 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:49,277 INFO L93 Difference]: Finished difference Result 153 states and 325 transitions. [2019-12-27 19:17:49,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:49,277 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:49,278 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:49,278 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:49,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2019-12-27 19:17:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:49,281 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:49,282 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:49,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:49,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:49,282 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:49,282 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:49,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:49,483 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash 977254565, now seen corresponding path program 93 times [2019-12-27 19:17:49,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:49,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867731729] [2019-12-27 19:17:49,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:49,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867731729] [2019-12-27 19:17:49,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847541233] [2019-12-27 19:17:49,554 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:49,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:17:49,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:49,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:49,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:49,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:49,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:49,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [638721225] [2019-12-27 19:17:49,779 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:49,780 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:49,781 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:49,781 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:49,782 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:49,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:49,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:49,783 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:50,013 INFO L93 Difference]: Finished difference Result 154 states and 326 transitions. [2019-12-27 19:17:50,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:50,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:50,014 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:50,014 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:50,015 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 115. [2019-12-27 19:17:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:50,018 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:50,018 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:50,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:50,019 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:50,019 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:50,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:50,222 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:50,223 INFO L82 PathProgramCache]: Analyzing trace with hash 977254658, now seen corresponding path program 94 times [2019-12-27 19:17:50,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:50,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077050901] [2019-12-27 19:17:50,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:50,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077050901] [2019-12-27 19:17:50,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422459205] [2019-12-27 19:17:50,304 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:50,349 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:50,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:50,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:50,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:50,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:50,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:50,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [320613092] [2019-12-27 19:17:50,515 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:50,516 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:50,518 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:50,518 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:50,519 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:50,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:50,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:50,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:50,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:50,521 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:50,761 INFO L93 Difference]: Finished difference Result 154 states and 326 transitions. [2019-12-27 19:17:50,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:50,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:50,762 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:50,762 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:50,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:50,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2019-12-27 19:17:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 19:17:50,764 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 19:17:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:50,764 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 19:17:50,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 19:17:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:50,764 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:50,764 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:50,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:50,965 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:50,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:50,966 INFO L82 PathProgramCache]: Analyzing trace with hash 977341055, now seen corresponding path program 95 times [2019-12-27 19:17:50,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:50,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532668290] [2019-12-27 19:17:50,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:51,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532668290] [2019-12-27 19:17:51,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630275282] [2019-12-27 19:17:51,039 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:51,083 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:17:51,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:51,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:51,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:51,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:51,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:51,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1133559284] [2019-12-27 19:17:51,227 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:51,228 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:51,230 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:51,230 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:51,231 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:51,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:51,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:51,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:51,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:51,232 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 19:17:51,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:51,458 INFO L93 Difference]: Finished difference Result 158 states and 333 transitions. [2019-12-27 19:17:51,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:51,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:51,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:51,459 INFO L225 Difference]: With dead ends: 158 [2019-12-27 19:17:51,459 INFO L226 Difference]: Without dead ends: 157 [2019-12-27 19:17:51,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-27 19:17:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 115. [2019-12-27 19:17:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:51,462 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:51,462 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:51,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:51,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:51,463 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:51,463 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:51,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:51,664 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:51,665 INFO L82 PathProgramCache]: Analyzing trace with hash 977341148, now seen corresponding path program 96 times [2019-12-27 19:17:51,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:51,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145276258] [2019-12-27 19:17:51,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:51,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145276258] [2019-12-27 19:17:51,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771272131] [2019-12-27 19:17:51,738 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:51,782 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:51,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:51,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:51,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:51,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:51,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:51,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1020696187] [2019-12-27 19:17:51,944 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:51,945 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:51,947 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:51,947 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:51,948 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:51,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:51,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:51,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:51,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:51,949 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:52,281 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2019-12-27 19:17:52,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:52,281 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:52,282 INFO L225 Difference]: With dead ends: 157 [2019-12-27 19:17:52,282 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 19:17:52,283 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:17:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 19:17:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 114. [2019-12-27 19:17:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:52,286 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:52,286 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:52,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:52,286 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:52,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:52,287 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:52,287 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:52,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:52,491 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:52,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:52,492 INFO L82 PathProgramCache]: Analyzing trace with hash 977343938, now seen corresponding path program 97 times [2019-12-27 19:17:52,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:52,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152891089] [2019-12-27 19:17:52,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:52,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152891089] [2019-12-27 19:17:52,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175887302] [2019-12-27 19:17:52,574 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:52,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:52,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:52,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:52,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:52,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2066041091] [2019-12-27 19:17:52,737 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:52,738 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:52,739 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:52,739 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:52,740 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:52,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:52,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:52,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:52,740 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:52,948 INFO L93 Difference]: Finished difference Result 152 states and 321 transitions. [2019-12-27 19:17:52,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:52,948 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:52,949 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:17:52,949 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:17:52,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:17:52,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2019-12-27 19:17:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:52,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:52,952 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:52,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:52,953 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:52,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:52,953 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:52,953 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:52,953 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:53,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:53,156 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash 977344031, now seen corresponding path program 98 times [2019-12-27 19:17:53,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:53,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483253926] [2019-12-27 19:17:53,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:53,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483253926] [2019-12-27 19:17:53,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483217797] [2019-12-27 19:17:53,227 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:53,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:53,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:53,273 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:53,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:53,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:53,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:53,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [727752900] [2019-12-27 19:17:53,374 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:53,375 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:53,377 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:53,377 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:53,378 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:53,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:53,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:53,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:53,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:53,379 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:53,547 INFO L93 Difference]: Finished difference Result 144 states and 304 transitions. [2019-12-27 19:17:53,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:53,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:53,549 INFO L225 Difference]: With dead ends: 144 [2019-12-27 19:17:53,549 INFO L226 Difference]: Without dead ends: 143 [2019-12-27 19:17:53,549 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-27 19:17:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2019-12-27 19:17:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 243 transitions. [2019-12-27 19:17:53,552 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 243 transitions. Word has length 13 [2019-12-27 19:17:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:53,552 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 243 transitions. [2019-12-27 19:17:53,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 243 transitions. [2019-12-27 19:17:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:53,553 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:53,553 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:53,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:53,754 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1060368572, now seen corresponding path program 99 times [2019-12-27 19:17:53,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:53,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296020271] [2019-12-27 19:17:53,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:53,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296020271] [2019-12-27 19:17:53,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847808307] [2019-12-27 19:17:53,818 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:53,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:17:53,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:53,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:53,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:53,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:53,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:53,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [599185364] [2019-12-27 19:17:53,973 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:53,974 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:53,975 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:53,975 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:53,976 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:53,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:53,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:53,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:53,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:53,976 INFO L87 Difference]: Start difference. First operand 111 states and 243 transitions. Second operand 9 states. [2019-12-27 19:17:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:54,143 INFO L93 Difference]: Finished difference Result 141 states and 298 transitions. [2019-12-27 19:17:54,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:54,143 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:54,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:54,144 INFO L225 Difference]: With dead ends: 141 [2019-12-27 19:17:54,144 INFO L226 Difference]: Without dead ends: 140 [2019-12-27 19:17:54,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:54,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-12-27 19:17:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 115. [2019-12-27 19:17:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:54,148 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:54,148 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:54,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:54,149 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:54,149 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:54,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:54,352 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:54,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:54,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1060368665, now seen corresponding path program 100 times [2019-12-27 19:17:54,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:54,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987249617] [2019-12-27 19:17:54,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:54,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987249617] [2019-12-27 19:17:54,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625182676] [2019-12-27 19:17:54,423 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:54,462 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:54,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:54,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:54,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:54,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:54,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:54,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1198600754] [2019-12-27 19:17:54,572 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:54,573 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:54,574 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:54,575 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:54,575 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:54,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:54,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:54,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:54,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:54,575 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:54,777 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 19:17:54,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:54,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:54,778 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:17:54,778 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:17:54,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:17:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2019-12-27 19:17:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:54,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:54,781 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:54,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:54,781 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:54,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:54,781 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:54,781 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:54,781 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:54,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:54,982 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:54,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:54,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1060371455, now seen corresponding path program 101 times [2019-12-27 19:17:54,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:54,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305444890] [2019-12-27 19:17:54,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:55,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305444890] [2019-12-27 19:17:55,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912482783] [2019-12-27 19:17:55,056 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:55,097 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:17:55,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:55,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:55,099 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:55,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:55,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:55,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [474550134] [2019-12-27 19:17:55,452 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:55,453 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:55,454 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:55,454 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:55,455 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:55,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:55,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:55,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:55,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:55,456 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:55,671 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2019-12-27 19:17:55,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:55,672 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:55,672 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:55,672 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:55,673 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:55,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:55,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2019-12-27 19:17:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:55,675 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:55,675 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:55,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:55,676 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:55,676 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:55,676 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:55,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:55,877 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:55,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1060371548, now seen corresponding path program 102 times [2019-12-27 19:17:55,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:55,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78748175] [2019-12-27 19:17:55,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:55,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78748175] [2019-12-27 19:17:55,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842472567] [2019-12-27 19:17:55,945 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:55,987 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:17:55,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:55,988 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:55,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:56,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:56,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:56,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [693042856] [2019-12-27 19:17:56,115 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:56,116 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:56,118 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:56,118 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:56,118 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:56,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:56,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:56,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:56,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:56,119 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:56,319 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 19:17:56,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:56,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:56,320 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:17:56,320 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:17:56,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:56,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:17:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2019-12-27 19:17:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 19:17:56,323 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 19:17:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:56,323 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 19:17:56,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 19:17:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:56,324 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:56,324 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:56,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:56,524 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:56,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:56,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1060457945, now seen corresponding path program 103 times [2019-12-27 19:17:56,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:56,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325514292] [2019-12-27 19:17:56,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:56,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325514292] [2019-12-27 19:17:56,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222350065] [2019-12-27 19:17:56,592 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:56,637 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:56,637 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:56,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:56,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:56,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1583307036] [2019-12-27 19:17:56,729 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:56,730 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:56,731 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:56,731 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:56,732 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:56,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:56,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:56,732 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 19:17:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:56,908 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 19:17:56,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:56,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:56,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:56,909 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:17:56,909 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:17:56,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:56,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:17:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 115. [2019-12-27 19:17:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:56,912 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:56,913 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:56,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:56,913 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:56,913 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:57,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:57,114 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:57,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1060458038, now seen corresponding path program 104 times [2019-12-27 19:17:57,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:57,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210935831] [2019-12-27 19:17:57,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:57,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210935831] [2019-12-27 19:17:57,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919201289] [2019-12-27 19:17:57,182 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:57,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:57,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:57,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:57,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:57,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:57,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:57,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1059497059] [2019-12-27 19:17:57,323 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:57,324 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:57,326 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:57,326 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:57,327 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:57,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:57,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:57,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:57,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:57,327 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:57,528 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 19:17:57,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:57,529 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:57,530 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:17:57,530 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:17:57,530 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:17:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 114. [2019-12-27 19:17:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:57,533 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:57,533 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:57,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:57,533 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:57,534 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:57,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:57,734 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1060460828, now seen corresponding path program 105 times [2019-12-27 19:17:57,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:57,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229193638] [2019-12-27 19:17:57,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:57,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229193638] [2019-12-27 19:17:57,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13767264] [2019-12-27 19:17:57,810 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:57,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:17:57,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:57,853 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:57,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:57,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:57,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:57,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [28877862] [2019-12-27 19:17:57,953 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:57,953 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:57,955 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:57,955 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:57,955 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:57,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:57,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:57,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:57,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:57,956 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:58,164 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 19:17:58,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:58,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:58,165 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:17:58,166 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:17:58,166 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:17:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 115. [2019-12-27 19:17:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:58,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:58,169 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:58,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:58,169 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:58,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:58,169 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:58,169 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:58,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:58,370 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:58,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:58,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1060460921, now seen corresponding path program 106 times [2019-12-27 19:17:58,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:58,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332935775] [2019-12-27 19:17:58,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:58,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332935775] [2019-12-27 19:17:58,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631878300] [2019-12-27 19:17:58,455 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:58,509 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:58,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:58,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:58,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:58,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:58,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:58,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1535144818] [2019-12-27 19:17:58,606 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:58,607 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:58,609 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:58,609 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:58,610 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:58,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:58,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:58,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:58,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:58,610 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:58,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:58,780 INFO L93 Difference]: Finished difference Result 154 states and 323 transitions. [2019-12-27 19:17:58,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:58,780 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:58,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:58,781 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:58,781 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:58,782 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2019-12-27 19:17:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:17:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 247 transitions. [2019-12-27 19:17:58,785 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 247 transitions. Word has length 13 [2019-12-27 19:17:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:58,785 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 247 transitions. [2019-12-27 19:17:58,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 247 transitions. [2019-12-27 19:17:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:58,785 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:58,785 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:58,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:58,988 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:58,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:58,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1063139135, now seen corresponding path program 107 times [2019-12-27 19:17:58,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:58,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307392864] [2019-12-27 19:17:58,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:59,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307392864] [2019-12-27 19:17:59,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6166155] [2019-12-27 19:17:59,094 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:59,137 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:59,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:59,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:59,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:59,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:59,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:59,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1677140755] [2019-12-27 19:17:59,245 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:59,246 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:59,248 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:59,248 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:59,248 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:59,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:59,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:59,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:59,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:59,249 INFO L87 Difference]: Start difference. First operand 112 states and 247 transitions. Second operand 9 states. [2019-12-27 19:17:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:59,429 INFO L93 Difference]: Finished difference Result 147 states and 310 transitions. [2019-12-27 19:17:59,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:59,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:59,430 INFO L225 Difference]: With dead ends: 147 [2019-12-27 19:17:59,430 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 19:17:59,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 19:17:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 115. [2019-12-27 19:17:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:59,433 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:59,433 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:59,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:59,434 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:59,434 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:59,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:59,635 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:59,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:59,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1063139228, now seen corresponding path program 108 times [2019-12-27 19:17:59,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:59,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094249298] [2019-12-27 19:17:59,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:59,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094249298] [2019-12-27 19:17:59,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799479705] [2019-12-27 19:17:59,703 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:59,746 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:59,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:59,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:59,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:59,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:59,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:59,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2114073966] [2019-12-27 19:17:59,922 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:59,924 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:59,925 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:59,925 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:59,926 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:59,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:59,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:59,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:59,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:59,926 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:18:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:00,185 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 19:18:00,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:00,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:00,187 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:18:00,187 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:18:00,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:18:00,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:18:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2019-12-27 19:18:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:18:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:18:00,190 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:18:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:00,190 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:18:00,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:18:00,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:00,191 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:00,191 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:00,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:00,391 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1063142018, now seen corresponding path program 109 times [2019-12-27 19:18:00,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:00,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665391686] [2019-12-27 19:18:00,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:00,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665391686] [2019-12-27 19:18:00,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599701801] [2019-12-27 19:18:00,465 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:00,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:18:00,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:01,636 WARN L192 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 19:18:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:01,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:01,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:18:01,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [32462575] [2019-12-27 19:18:01,675 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:01,675 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:01,677 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:18:01,677 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:01,677 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:18:01,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:18:01,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:01,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:18:01,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2019-12-27 19:18:01,678 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:18:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:02,788 INFO L93 Difference]: Finished difference Result 152 states and 321 transitions. [2019-12-27 19:18:02,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:02,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:02,789 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:18:02,789 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:18:02,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=144, Invalid=359, Unknown=3, NotChecked=0, Total=506 [2019-12-27 19:18:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:18:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2019-12-27 19:18:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:18:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:18:02,792 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:18:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:02,792 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:18:02,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:18:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:02,793 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:02,793 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:02,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:02,994 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:02,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1063142111, now seen corresponding path program 110 times [2019-12-27 19:18:02,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:02,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851304044] [2019-12-27 19:18:02,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:03,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851304044] [2019-12-27 19:18:03,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533316863] [2019-12-27 19:18:03,062 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:03,103 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:18:03,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:03,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:18:03,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:04,950 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 19:18:06,132 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 19:18:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:06,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:06,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:18:06,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [535167439] [2019-12-27 19:18:06,134 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:06,134 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:06,136 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:18:06,136 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:06,137 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:18:06,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:18:06,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:06,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:18:06,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=175, Unknown=4, NotChecked=0, Total=240 [2019-12-27 19:18:06,138 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:18:07,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:07,607 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 19:18:07,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:07,607 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:07,608 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:18:07,608 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:18:07,609 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=145, Invalid=355, Unknown=6, NotChecked=0, Total=506 [2019-12-27 19:18:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:18:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2019-12-27 19:18:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:18:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 19:18:07,612 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 19:18:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:07,612 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 19:18:07,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 19:18:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:07,613 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:07,613 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:07,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:07,816 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:07,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1063228508, now seen corresponding path program 111 times [2019-12-27 19:18:07,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:07,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428014474] [2019-12-27 19:18:07,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:07,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428014474] [2019-12-27 19:18:07,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074225335] [2019-12-27 19:18:07,883 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:07,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:18:07,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:07,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 19:18:07,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:08,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:08,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:18:08,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [532723113] [2019-12-27 19:18:08,027 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:08,028 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:08,029 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:18:08,029 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:08,030 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:18:08,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:18:08,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:08,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:18:08,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:18:08,031 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 19:18:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:08,225 INFO L93 Difference]: Finished difference Result 148 states and 311 transitions. [2019-12-27 19:18:08,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:18:08,225 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:08,226 INFO L225 Difference]: With dead ends: 148 [2019-12-27 19:18:08,226 INFO L226 Difference]: Without dead ends: 147 [2019-12-27 19:18:08,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:18:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-27 19:18:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2019-12-27 19:18:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:18:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:18:08,230 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:18:08,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:08,230 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:18:08,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:08,230 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:18:08,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:08,231 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:08,231 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:08,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:08,434 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:08,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:08,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1063228601, now seen corresponding path program 112 times [2019-12-27 19:18:08,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:08,435 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028614522] [2019-12-27 19:18:08,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:08,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028614522] [2019-12-27 19:18:08,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182678657] [2019-12-27 19:18:08,505 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:08,548 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:18:08,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:08,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:18:08,549 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:09,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:09,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:18:09,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [943881847] [2019-12-27 19:18:09,455 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:09,456 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:09,457 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:18:09,457 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:09,458 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:18:09,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:18:09,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:09,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:18:09,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2019-12-27 19:18:09,459 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:18:10,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:10,243 INFO L93 Difference]: Finished difference Result 154 states and 323 transitions. [2019-12-27 19:18:10,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:18:10,243 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:10,244 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:18:10,244 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:18:10,244 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=154, Invalid=396, Unknown=2, NotChecked=0, Total=552 [2019-12-27 19:18:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:18:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 114. [2019-12-27 19:18:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:18:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:18:10,247 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:18:10,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:10,248 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:18:10,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:18:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:10,248 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:10,248 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:10,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:10,452 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:10,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1063231391, now seen corresponding path program 113 times [2019-12-27 19:18:10,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:10,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335113622] [2019-12-27 19:18:10,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:10,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335113622] [2019-12-27 19:18:10,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308155973] [2019-12-27 19:18:10,521 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:10,561 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:18:10,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:10,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:18:10,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:10,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:10,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:18:10,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [298469663] [2019-12-27 19:18:10,660 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:10,661 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:10,662 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:18:10,662 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:10,663 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:18:10,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:18:10,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:18:10,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:18:10,663 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:18:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:10,855 INFO L93 Difference]: Finished difference Result 144 states and 301 transitions. [2019-12-27 19:18:10,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:18:10,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:10,856 INFO L225 Difference]: With dead ends: 144 [2019-12-27 19:18:10,856 INFO L226 Difference]: Without dead ends: 143 [2019-12-27 19:18:10,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:18:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-27 19:18:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2019-12-27 19:18:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:18:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:18:10,860 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:18:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:10,860 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:18:10,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:18:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:10,861 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:10,861 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:11,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:11,064 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1063231484, now seen corresponding path program 114 times [2019-12-27 19:18:11,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:11,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095024380] [2019-12-27 19:18:11,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:11,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095024380] [2019-12-27 19:18:11,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193091864] [2019-12-27 19:18:11,155 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:11,194 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:18:11,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:11,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:18:11,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:11,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:11,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:18:11,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1888673233] [2019-12-27 19:18:11,290 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:11,292 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:11,293 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:18:11,294 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:11,294 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:18:11,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:18:11,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:11,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:18:11,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:18:11,295 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:18:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:11,455 INFO L93 Difference]: Finished difference Result 137 states and 285 transitions. [2019-12-27 19:18:11,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:18:11,455 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:11,456 INFO L225 Difference]: With dead ends: 137 [2019-12-27 19:18:11,456 INFO L226 Difference]: Without dead ends: 136 [2019-12-27 19:18:11,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:18:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-12-27 19:18:11,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2019-12-27 19:18:11,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:18:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2019-12-27 19:18:11,458 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 13 [2019-12-27 19:18:11,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:11,459 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2019-12-27 19:18:11,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:11,459 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2019-12-27 19:18:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:11,459 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:11,459 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:11,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:11,663 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:11,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1765472381, now seen corresponding path program 7 times [2019-12-27 19:18:11,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:11,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542540961] [2019-12-27 19:18:11,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:11,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542540961] [2019-12-27 19:18:11,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20462261] [2019-12-27 19:18:11,756 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:11,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:11,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:11,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:11,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:11,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1071078124] [2019-12-27 19:18:11,918 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:11,919 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:11,920 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 13 transitions. [2019-12-27 19:18:11,920 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:11,920 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:11,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:11,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:11,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:11,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:11,921 INFO L87 Difference]: Start difference. First operand 112 states and 244 transitions. Second operand 10 states. [2019-12-27 19:18:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:12,136 INFO L93 Difference]: Finished difference Result 135 states and 288 transitions. [2019-12-27 19:18:12,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:12,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-27 19:18:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:12,137 INFO L225 Difference]: With dead ends: 135 [2019-12-27 19:18:12,137 INFO L226 Difference]: Without dead ends: 134 [2019-12-27 19:18:12,138 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-27 19:18:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2019-12-27 19:18:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-27 19:18:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 268 transitions. [2019-12-27 19:18:12,141 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 268 transitions. Word has length 13 [2019-12-27 19:18:12,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:12,142 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 268 transitions. [2019-12-27 19:18:12,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 268 transitions. [2019-12-27 19:18:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:12,142 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:12,142 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:12,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:12,346 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:12,346 INFO L82 PathProgramCache]: Analyzing trace with hash 689055580, now seen corresponding path program 8 times [2019-12-27 19:18:12,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:12,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675956249] [2019-12-27 19:18:12,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:12,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675956249] [2019-12-27 19:18:12,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678269664] [2019-12-27 19:18:12,453 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:12,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:18:12,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:12,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 19:18:12,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:12,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:12,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 19:18:12,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1705281197] [2019-12-27 19:18:12,667 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:12,668 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:12,671 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 19:18:12,671 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:12,671 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:12,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:18:12,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:18:12,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:18:12,672 INFO L87 Difference]: Start difference. First operand 119 states and 268 transitions. Second operand 11 states. [2019-12-27 19:18:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:12,911 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2019-12-27 19:18:12,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:18:12,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-27 19:18:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:12,912 INFO L225 Difference]: With dead ends: 146 [2019-12-27 19:18:12,912 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 19:18:12,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=550, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:18:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 19:18:12,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2019-12-27 19:18:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:12,915 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:12,915 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:12,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:18:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:12,915 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:12,915 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:13,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:13,116 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:13,117 INFO L82 PathProgramCache]: Analyzing trace with hash 663066358, now seen corresponding path program 115 times [2019-12-27 19:18:13,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:13,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971907212] [2019-12-27 19:18:13,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:13,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971907212] [2019-12-27 19:18:13,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586141527] [2019-12-27 19:18:13,198 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:13,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:13,239 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:13,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:13,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:13,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [751924046] [2019-12-27 19:18:13,407 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:13,408 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:13,412 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 56 transitions. [2019-12-27 19:18:13,412 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:13,412 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:13,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:13,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:13,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:13,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:13,413 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:13,771 INFO L93 Difference]: Finished difference Result 156 states and 333 transitions. [2019-12-27 19:18:13,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:13,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:13,772 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:18:13,772 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:18:13,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:18:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 124. [2019-12-27 19:18:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:13,775 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:13,775 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:13,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:13,776 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:13,776 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:13,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:13,980 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:13,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:13,980 INFO L82 PathProgramCache]: Analyzing trace with hash -117422285, now seen corresponding path program 116 times [2019-12-27 19:18:13,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:13,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188938018] [2019-12-27 19:18:13,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:14,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188938018] [2019-12-27 19:18:14,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369535995] [2019-12-27 19:18:14,082 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:14,128 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:18:14,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:14,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:14,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:14,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:14,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:14,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1823532037] [2019-12-27 19:18:14,290 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:14,291 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:14,294 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 19:18:14,294 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:14,294 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:14,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:14,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:14,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:14,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:14,295 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:14,539 INFO L93 Difference]: Finished difference Result 167 states and 356 transitions. [2019-12-27 19:18:14,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:14,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:14,540 INFO L225 Difference]: With dead ends: 167 [2019-12-27 19:18:14,540 INFO L226 Difference]: Without dead ends: 166 [2019-12-27 19:18:14,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-27 19:18:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2019-12-27 19:18:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:14,544 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:14,544 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:14,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:14,544 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:14,545 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:14,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:14,748 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:14,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:14,748 INFO L82 PathProgramCache]: Analyzing trace with hash -117422192, now seen corresponding path program 117 times [2019-12-27 19:18:14,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:14,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854039969] [2019-12-27 19:18:14,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:14,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854039969] [2019-12-27 19:18:14,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197178862] [2019-12-27 19:18:14,832 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:14,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:18:14,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:14,880 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:14,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:15,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:15,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:15,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1120947131] [2019-12-27 19:18:15,041 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:15,042 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:15,044 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 19:18:15,044 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:15,045 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:15,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:15,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:15,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:15,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:15,045 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:15,689 INFO L93 Difference]: Finished difference Result 167 states and 356 transitions. [2019-12-27 19:18:15,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:15,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:15,690 INFO L225 Difference]: With dead ends: 167 [2019-12-27 19:18:15,690 INFO L226 Difference]: Without dead ends: 166 [2019-12-27 19:18:15,691 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:15,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-27 19:18:15,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2019-12-27 19:18:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:15,694 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:15,694 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:15,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:15,695 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:15,695 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:15,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:15,897 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:15,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:15,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233558, now seen corresponding path program 118 times [2019-12-27 19:18:15,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:15,898 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656542161] [2019-12-27 19:18:15,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:16,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656542161] [2019-12-27 19:18:16,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500113612] [2019-12-27 19:18:16,011 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:16,057 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:18:16,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:16,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:16,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:16,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:16,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:16,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1655328886] [2019-12-27 19:18:16,192 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:16,193 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:16,195 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 19:18:16,196 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:16,196 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:16,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:16,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:16,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:16,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:16,196 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:16,430 INFO L93 Difference]: Finished difference Result 173 states and 368 transitions. [2019-12-27 19:18:16,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:16,431 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:16,431 INFO L225 Difference]: With dead ends: 173 [2019-12-27 19:18:16,431 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:18:16,432 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:16,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:18:16,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 19:18:16,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:16,435 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:16,435 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:16,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:16,435 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:16,436 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:16,436 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:16,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:16,637 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:16,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233651, now seen corresponding path program 119 times [2019-12-27 19:18:16,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:16,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906666760] [2019-12-27 19:18:16,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:16,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906666760] [2019-12-27 19:18:16,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108512931] [2019-12-27 19:18:16,729 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:16,773 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:18:16,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:16,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:16,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:16,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:16,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:16,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [428747975] [2019-12-27 19:18:16,942 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:16,943 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:16,946 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 19:18:16,946 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:16,946 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:16,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:16,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:16,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:16,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:16,947 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:17,220 INFO L93 Difference]: Finished difference Result 173 states and 371 transitions. [2019-12-27 19:18:17,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:17,220 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:17,221 INFO L225 Difference]: With dead ends: 173 [2019-12-27 19:18:17,221 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:18:17,221 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:18:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-12-27 19:18:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:18:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:18:17,225 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:18:17,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:17,225 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:18:17,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:18:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:17,225 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:17,225 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:17,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:17,426 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236441, now seen corresponding path program 120 times [2019-12-27 19:18:17,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:17,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536596606] [2019-12-27 19:18:17,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:17,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536596606] [2019-12-27 19:18:17,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683042824] [2019-12-27 19:18:17,544 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:17,589 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:18:17,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:17,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:17,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:18,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:18,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:18,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1366451680] [2019-12-27 19:18:18,231 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:18,232 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:18,235 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 19:18:18,235 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:18,236 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:18,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:18,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:18,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:18,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:18:18,236 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:18:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:18,933 INFO L93 Difference]: Finished difference Result 174 states and 372 transitions. [2019-12-27 19:18:18,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:18,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:18,935 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:18:18,935 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:18:18,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=170, Invalid=428, Unknown=2, NotChecked=0, Total=600 [2019-12-27 19:18:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:18:18,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2019-12-27 19:18:18,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:18:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:18:18,938 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:18:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:18,938 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:18:18,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:18:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:18,939 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:18,939 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:19,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:19,139 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:19,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236534, now seen corresponding path program 121 times [2019-12-27 19:18:19,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:19,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266376384] [2019-12-27 19:18:19,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:19,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266376384] [2019-12-27 19:18:19,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26426558] [2019-12-27 19:18:19,234 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:19,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:19,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:20,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:20,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:20,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1957399190] [2019-12-27 19:18:20,552 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:20,553 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:20,555 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 19:18:20,555 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:20,556 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:20,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:20,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:20,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:20,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:20,556 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:18:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:21,283 INFO L93 Difference]: Finished difference Result 173 states and 371 transitions. [2019-12-27 19:18:21,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:21,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:21,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:21,284 INFO L225 Difference]: With dead ends: 173 [2019-12-27 19:18:21,284 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:18:21,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:21,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:18:21,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 19:18:21,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:21,287 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:21,287 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:21,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:21,288 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:21,288 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:21,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:21,488 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:21,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:21,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042861, now seen corresponding path program 122 times [2019-12-27 19:18:21,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:21,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774045372] [2019-12-27 19:18:21,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:21,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774045372] [2019-12-27 19:18:21,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913399439] [2019-12-27 19:18:21,585 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:21,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:18:21,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:21,629 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:21,629 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:21,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:21,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:21,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1448735415] [2019-12-27 19:18:21,761 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:21,762 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:21,764 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:21,764 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:21,765 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:21,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:21,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:21,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:21,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:21,765 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:21,988 INFO L93 Difference]: Finished difference Result 173 states and 368 transitions. [2019-12-27 19:18:21,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:21,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:21,989 INFO L225 Difference]: With dead ends: 173 [2019-12-27 19:18:21,989 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:18:21,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:18:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 19:18:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:21,993 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:21,993 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:21,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:21,994 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:21,994 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:22,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:22,197 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:22,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042768, now seen corresponding path program 123 times [2019-12-27 19:18:22,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:22,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437020650] [2019-12-27 19:18:22,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:22,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437020650] [2019-12-27 19:18:22,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342511013] [2019-12-27 19:18:22,288 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:22,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:18:22,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:22,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:22,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:23,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:23,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:23,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1162835221] [2019-12-27 19:18:23,546 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:23,547 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:23,549 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:23,549 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:23,549 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:23,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:23,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:23,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:18:23,550 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:23,852 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 19:18:23,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:23,852 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:23,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:23,853 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:18:23,853 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:18:23,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=170, Invalid=429, Unknown=1, NotChecked=0, Total=600 [2019-12-27 19:18:23,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:18:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2019-12-27 19:18:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:18:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:18:23,856 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:18:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:23,856 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:18:23,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:18:23,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:23,856 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:23,856 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:24,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:24,057 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039978, now seen corresponding path program 124 times [2019-12-27 19:18:24,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:24,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425518382] [2019-12-27 19:18:24,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:24,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425518382] [2019-12-27 19:18:24,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825547686] [2019-12-27 19:18:24,141 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:24,184 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:18:24,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:24,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:24,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:26,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:26,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:26,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [260700351] [2019-12-27 19:18:26,926 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:26,927 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:26,929 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:26,929 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:26,929 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:26,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:26,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:26,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:26,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:18:26,930 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:18:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:28,183 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2019-12-27 19:18:28,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:18:28,183 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:28,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:28,184 INFO L225 Difference]: With dead ends: 179 [2019-12-27 19:18:28,184 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 19:18:28,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=183, Invalid=464, Unknown=3, NotChecked=0, Total=650 [2019-12-27 19:18:28,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 19:18:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2019-12-27 19:18:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:18:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:18:28,188 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:18:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:28,188 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:18:28,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:18:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:28,189 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:28,189 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:28,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:28,389 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:28,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039885, now seen corresponding path program 125 times [2019-12-27 19:18:28,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:28,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796430991] [2019-12-27 19:18:28,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:28,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796430991] [2019-12-27 19:18:28,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692950862] [2019-12-27 19:18:28,473 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:28,515 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:18:28,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:28,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:28,517 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:30,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:30,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:30,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [804957410] [2019-12-27 19:18:30,508 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:30,509 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:30,512 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:30,513 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:30,513 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:30,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:30,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:30,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:30,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:18:30,513 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:18:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:31,786 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2019-12-27 19:18:31,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:31,787 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:31,788 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:18:31,788 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:18:31,788 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=172, Invalid=425, Unknown=3, NotChecked=0, Total=600 [2019-12-27 19:18:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:18:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 125. [2019-12-27 19:18:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:18:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:18:31,791 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:18:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:31,791 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:18:31,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:31,791 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:18:31,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:31,791 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:31,791 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:31,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:31,992 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:31,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:31,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953488, now seen corresponding path program 126 times [2019-12-27 19:18:31,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:31,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986101136] [2019-12-27 19:18:31,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:32,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986101136] [2019-12-27 19:18:32,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559094057] [2019-12-27 19:18:32,080 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:32,120 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:18:32,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:32,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:32,122 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:36,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:36,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:36,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [976589171] [2019-12-27 19:18:36,577 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:36,578 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:36,580 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:36,580 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:36,580 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:36,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:36,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:36,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:36,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:18:36,581 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:18:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:40,180 INFO L93 Difference]: Finished difference Result 177 states and 378 transitions. [2019-12-27 19:18:40,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:40,180 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:40,181 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:18:40,181 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:18:40,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=169, Invalid=423, Unknown=8, NotChecked=0, Total=600 [2019-12-27 19:18:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:18:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 125. [2019-12-27 19:18:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:18:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:18:40,184 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:18:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:40,185 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:18:40,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:18:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:40,185 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:40,185 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:40,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:40,386 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:40,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953395, now seen corresponding path program 127 times [2019-12-27 19:18:40,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:40,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446487201] [2019-12-27 19:18:40,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:40,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446487201] [2019-12-27 19:18:40,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397555353] [2019-12-27 19:18:40,470 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:40,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:40,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:40,995 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_415 Int)) (and (<= c_~i~0 (+ v_~i~0_415 c_~j~0)) (<= c_~j~0 (+ v_~i~0_415 1)) (<= (div (+ (* v_~i~0_415 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-27 19:18:41,421 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_415 Int)) (and (<= c_~j~0 (+ v_~i~0_415 c_~i~0 1)) (<= c_~i~0 (+ (* 2 v_~i~0_415) 1)) (<= (div (+ (* v_~i~0_415 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-27 19:18:41,804 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_415 Int)) (and (<= c_~i~0 (+ (* 2 v_~i~0_415) c_~j~0 1)) (<= (div (+ (* v_~i~0_415 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ (* 3 v_~i~0_415) 2)))) is different from true [2019-12-27 19:18:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2019-12-27 19:18:41,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:41,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:41,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [392072590] [2019-12-27 19:18:41,805 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:41,806 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:41,808 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:41,808 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:41,808 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:41,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:41,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:41,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:41,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=156, Unknown=3, NotChecked=84, Total=306 [2019-12-27 19:18:41,809 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:18:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:42,057 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 19:18:42,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:42,058 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:42,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:42,058 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:18:42,059 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:18:42,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=154, Invalid=317, Unknown=3, NotChecked=126, Total=600 [2019-12-27 19:18:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:18:42,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-27 19:18:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:18:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:18:42,062 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:18:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:42,062 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:18:42,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:42,062 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:18:42,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:42,062 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:42,062 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:42,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:42,263 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:42,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1267950605, now seen corresponding path program 128 times [2019-12-27 19:18:42,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:42,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127607121] [2019-12-27 19:18:42,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:42,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127607121] [2019-12-27 19:18:42,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257979068] [2019-12-27 19:18:42,378 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:42,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:18:42,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:42,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:42,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:42,910 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_420 Int)) (and (<= (div (+ (* v_~i~0_420 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ v_~i~0_420 1)) (<= c_~i~0 (+ v_~i~0_420 c_~j~0)))) is different from true [2019-12-27 19:18:50,329 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 19:18:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-27 19:18:50,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:50,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:50,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [898195689] [2019-12-27 19:18:50,330 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:50,332 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:50,335 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:50,335 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:50,335 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:50,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:50,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:50,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:50,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=4, NotChecked=30, Total=306 [2019-12-27 19:18:50,336 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:18:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:55,557 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 19:18:55,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:55,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:55,558 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:18:55,559 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:18:55,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=159, Invalid=391, Unknown=6, NotChecked=44, Total=600 [2019-12-27 19:18:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:18:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-27 19:18:55,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:18:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:18:55,562 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:18:55,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:55,562 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:18:55,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:55,563 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:18:55,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:55,563 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:55,563 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:55,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:55,766 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1267950512, now seen corresponding path program 129 times [2019-12-27 19:18:55,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:55,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899287026] [2019-12-27 19:18:55,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:55,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899287026] [2019-12-27 19:18:55,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831003452] [2019-12-27 19:18:55,851 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:55,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:18:55,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:55,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:55,898 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:56,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:56,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:56,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2137646146] [2019-12-27 19:18:56,794 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:56,795 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:56,797 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:56,797 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:56,797 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:56,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:56,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:56,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:56,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:18:56,798 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:18:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:57,314 INFO L93 Difference]: Finished difference Result 173 states and 374 transitions. [2019-12-27 19:18:57,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:57,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:57,315 INFO L225 Difference]: With dead ends: 173 [2019-12-27 19:18:57,316 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:18:57,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=173, Invalid=426, Unknown=1, NotChecked=0, Total=600 [2019-12-27 19:18:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:18:57,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 19:18:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:57,319 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:57,319 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:57,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:57,319 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:57,319 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:57,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:57,520 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:57,521 INFO L82 PathProgramCache]: Analyzing trace with hash 147734070, now seen corresponding path program 130 times [2019-12-27 19:18:57,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:57,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543519036] [2019-12-27 19:18:57,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:57,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543519036] [2019-12-27 19:18:57,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955772129] [2019-12-27 19:18:57,605 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:57,654 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:18:57,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:57,655 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:57,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:57,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:57,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:57,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [888329892] [2019-12-27 19:18:57,803 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:57,805 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:57,807 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:18:57,807 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:57,807 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:57,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:57,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:57,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:57,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:57,808 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:58,035 INFO L93 Difference]: Finished difference Result 168 states and 357 transitions. [2019-12-27 19:18:58,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:58,035 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:58,036 INFO L225 Difference]: With dead ends: 168 [2019-12-27 19:18:58,037 INFO L226 Difference]: Without dead ends: 167 [2019-12-27 19:18:58,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-27 19:18:58,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 124. [2019-12-27 19:18:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:58,040 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:58,041 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:58,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:58,041 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:58,041 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:58,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:58,245 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:58,245 INFO L82 PathProgramCache]: Analyzing trace with hash 147734163, now seen corresponding path program 131 times [2019-12-27 19:18:58,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:58,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869815435] [2019-12-27 19:18:58,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:58,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869815435] [2019-12-27 19:18:58,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510841763] [2019-12-27 19:18:58,361 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:58,404 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:18:58,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:58,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:58,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:58,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:58,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:58,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [303702929] [2019-12-27 19:18:58,577 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:58,578 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:58,580 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:18:58,580 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:58,580 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:58,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:58,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:58,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:58,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:58,581 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:58,869 INFO L93 Difference]: Finished difference Result 172 states and 370 transitions. [2019-12-27 19:18:58,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:58,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:58,870 INFO L225 Difference]: With dead ends: 172 [2019-12-27 19:18:58,870 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 19:18:58,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 19:18:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 127. [2019-12-27 19:18:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:18:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:18:58,874 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:18:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:58,874 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:18:58,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:18:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:58,874 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:58,875 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:59,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:59,075 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash 147736953, now seen corresponding path program 132 times [2019-12-27 19:18:59,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:59,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906121863] [2019-12-27 19:18:59,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:59,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906121863] [2019-12-27 19:18:59,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554387043] [2019-12-27 19:18:59,176 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:59,222 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:18:59,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:59,223 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:59,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:59,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:59,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:59,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1154414768] [2019-12-27 19:18:59,415 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:59,416 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:59,418 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:18:59,418 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:59,418 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:59,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:59,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:59,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:59,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:59,419 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:18:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:59,796 INFO L93 Difference]: Finished difference Result 180 states and 384 transitions. [2019-12-27 19:18:59,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:18:59,797 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:59,798 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:18:59,798 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:18:59,798 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:18:59,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:18:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 127. [2019-12-27 19:18:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:18:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:18:59,801 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:18:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:59,802 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:18:59,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:18:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:59,802 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:59,802 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:00,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:00,003 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:00,004 INFO L82 PathProgramCache]: Analyzing trace with hash 147737046, now seen corresponding path program 133 times [2019-12-27 19:19:00,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:00,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385857442] [2019-12-27 19:19:00,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:00,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385857442] [2019-12-27 19:19:00,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897022176] [2019-12-27 19:19:00,090 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:00,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:00,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:00,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:00,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:00,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1566677404] [2019-12-27 19:19:00,321 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:00,322 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:00,325 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:00,325 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:00,325 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:00,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:00,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:00,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:00,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:00,326 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:19:00,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:00,644 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2019-12-27 19:19:00,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:00,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:00,646 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:19:00,646 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:19:00,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:19:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 126. [2019-12-27 19:19:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:19:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:19:00,649 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:19:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:00,649 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:19:00,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:19:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:00,649 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:00,650 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:00,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:00,850 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:00,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:00,851 INFO L82 PathProgramCache]: Analyzing trace with hash 147823443, now seen corresponding path program 134 times [2019-12-27 19:19:00,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:00,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181949312] [2019-12-27 19:19:00,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:00,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181949312] [2019-12-27 19:19:00,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236844572] [2019-12-27 19:19:00,936 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:00,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:19:00,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:00,979 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:00,980 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:01,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:01,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:01,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1479128885] [2019-12-27 19:19:01,190 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:01,191 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:01,193 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:01,193 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:01,193 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:01,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:01,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:01,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:01,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:01,194 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:19:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:01,551 INFO L93 Difference]: Finished difference Result 180 states and 384 transitions. [2019-12-27 19:19:01,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:19:01,551 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:01,552 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:19:01,552 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:19:01,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:19:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:19:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 126. [2019-12-27 19:19:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:19:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:19:01,555 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:19:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:01,555 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:19:01,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:19:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:01,556 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:01,556 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:01,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:01,757 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:01,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:01,757 INFO L82 PathProgramCache]: Analyzing trace with hash 147823536, now seen corresponding path program 135 times [2019-12-27 19:19:01,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:01,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432725117] [2019-12-27 19:19:01,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:01,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432725117] [2019-12-27 19:19:01,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593203966] [2019-12-27 19:19:01,873 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:01,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:19:01,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:01,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:01,950 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:02,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:02,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:02,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1437572409] [2019-12-27 19:19:02,361 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:02,363 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:02,367 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:02,367 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:02,368 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:02,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:02,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:02,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:02,369 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:19:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:02,758 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:19:02,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:19:02,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:02,760 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:19:02,760 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:19:02,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:19:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:19:02,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 127. [2019-12-27 19:19:02,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:02,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:02,763 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:02,764 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:02,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:02,764 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:02,764 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:02,764 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:02,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:02,968 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:02,968 INFO L82 PathProgramCache]: Analyzing trace with hash 147826326, now seen corresponding path program 136 times [2019-12-27 19:19:02,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:02,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709374767] [2019-12-27 19:19:02,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:03,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709374767] [2019-12-27 19:19:03,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87718841] [2019-12-27 19:19:03,059 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:03,100 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:19:03,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:03,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:03,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:07,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:07,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:07,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [549923003] [2019-12-27 19:19:07,439 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:07,440 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:07,442 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:07,442 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:07,442 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:07,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:07,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:07,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:07,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:07,443 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:19:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:17,844 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:19:17,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:19:17,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:17,845 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:19:17,846 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:19:17,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=176, Invalid=469, Unknown=5, NotChecked=0, Total=650 [2019-12-27 19:19:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:19:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 127. [2019-12-27 19:19:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:17,849 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:17,849 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:17,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:17,849 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:17,850 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:17,850 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:18,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:18,050 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:18,051 INFO L82 PathProgramCache]: Analyzing trace with hash 147826419, now seen corresponding path program 137 times [2019-12-27 19:19:18,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:18,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137562752] [2019-12-27 19:19:18,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:18,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137562752] [2019-12-27 19:19:18,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744588275] [2019-12-27 19:19:18,139 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:18,180 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:19:18,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:18,181 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:18,182 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:18,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:18,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:18,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1528858873] [2019-12-27 19:19:18,394 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:18,395 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:18,397 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:18,397 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:18,398 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:18,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:18,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:18,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:18,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:18,398 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:19:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:18,686 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2019-12-27 19:19:18,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:18,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:18,687 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:19:18,688 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:19:18,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:19:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 125. [2019-12-27 19:19:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:19:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:19:18,692 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:19:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:18,692 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:19:18,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:19:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:18,692 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:18,693 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:18,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:18,896 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:18,896 INFO L82 PathProgramCache]: Analyzing trace with hash 150504633, now seen corresponding path program 138 times [2019-12-27 19:19:18,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:18,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966677972] [2019-12-27 19:19:18,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:18,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966677972] [2019-12-27 19:19:18,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449453505] [2019-12-27 19:19:18,989 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:19,033 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:19:19,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:19,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:19,035 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:19,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:19,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:19,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2139060323] [2019-12-27 19:19:19,245 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:19,246 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:19,249 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:19,249 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:19,249 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:19,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:19,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:19,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:19,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:19,250 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:19:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:19,602 INFO L93 Difference]: Finished difference Result 176 states and 374 transitions. [2019-12-27 19:19:19,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:19,602 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:19,603 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:19:19,604 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:19:19,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:19:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 125. [2019-12-27 19:19:19,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:19:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:19:19,606 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:19:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:19,606 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:19:19,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:19,606 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:19:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:19,607 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:19,607 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:19,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:19,809 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:19,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:19,810 INFO L82 PathProgramCache]: Analyzing trace with hash 150504726, now seen corresponding path program 139 times [2019-12-27 19:19:19,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:19,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380918907] [2019-12-27 19:19:19,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:19,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380918907] [2019-12-27 19:19:19,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548164203] [2019-12-27 19:19:19,902 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:19,947 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:19,947 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:20,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:20,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:20,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [838774705] [2019-12-27 19:19:20,283 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:20,284 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:20,286 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:20,286 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:20,286 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:20,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:20,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:20,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:20,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:20,287 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:19:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:22,663 INFO L93 Difference]: Finished difference Result 179 states and 386 transitions. [2019-12-27 19:19:22,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:22,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:22,664 INFO L225 Difference]: With dead ends: 179 [2019-12-27 19:19:22,665 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 19:19:22,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=169, Invalid=430, Unknown=1, NotChecked=0, Total=600 [2019-12-27 19:19:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 19:19:22,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 127. [2019-12-27 19:19:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:22,668 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:22,668 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:22,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:22,668 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:22,668 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:22,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:22,869 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:22,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:22,870 INFO L82 PathProgramCache]: Analyzing trace with hash 150507516, now seen corresponding path program 140 times [2019-12-27 19:19:22,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:22,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452952006] [2019-12-27 19:19:22,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:22,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452952006] [2019-12-27 19:19:22,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975323745] [2019-12-27 19:19:22,960 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:23,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:19:23,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:23,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:23,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:23,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:23,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:23,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1074753900] [2019-12-27 19:19:23,240 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:23,242 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:23,243 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:23,244 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:23,244 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:23,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:23,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:23,244 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:19:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:23,557 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 19:19:23,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:23,558 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:23,558 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:19:23,558 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:19:23,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:19:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2019-12-27 19:19:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:23,562 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:23,563 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:23,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:23,563 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:23,563 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:23,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:23,764 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash 150507609, now seen corresponding path program 141 times [2019-12-27 19:19:23,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:23,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947166161] [2019-12-27 19:19:23,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:23,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947166161] [2019-12-27 19:19:23,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334731399] [2019-12-27 19:19:23,849 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:23,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:19:23,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:23,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:23,895 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:24,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:24,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:24,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1057672972] [2019-12-27 19:19:24,123 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:24,123 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:24,125 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:24,125 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:24,126 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:24,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:24,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:24,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:24,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:24,126 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:19:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:24,452 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 19:19:24,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:24,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:24,453 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:19:24,454 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:19:24,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:19:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-27 19:19:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:19:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:19:24,457 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:19:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:24,457 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:19:24,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:19:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:24,458 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:24,458 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:24,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:24,659 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash 150594006, now seen corresponding path program 142 times [2019-12-27 19:19:24,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:24,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868195052] [2019-12-27 19:19:24,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:24,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868195052] [2019-12-27 19:19:24,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063459018] [2019-12-27 19:19:24,747 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:24,789 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:19:24,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:24,790 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:24,791 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:35,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:35,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:35,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1642230908] [2019-12-27 19:19:35,256 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:35,257 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:35,260 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:35,260 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:35,260 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:35,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:35,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:35,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:35,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=231, Unknown=2, NotChecked=0, Total=306 [2019-12-27 19:19:35,261 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:19:39,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:39,604 INFO L93 Difference]: Finished difference Result 178 states and 382 transitions. [2019-12-27 19:19:39,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:39,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:39,605 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:19:39,605 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:19:39,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=165, Invalid=431, Unknown=4, NotChecked=0, Total=600 [2019-12-27 19:19:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:19:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 126. [2019-12-27 19:19:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:19:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:19:39,608 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:19:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:39,609 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:19:39,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:19:39,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:39,609 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:39,609 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:39,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:39,810 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash 150594099, now seen corresponding path program 143 times [2019-12-27 19:19:39,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:39,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689368399] [2019-12-27 19:19:39,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:39,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689368399] [2019-12-27 19:19:39,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954732094] [2019-12-27 19:19:39,898 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:39,941 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:19:39,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:39,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:39,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:45,034 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_478 Int) (v_~i~0_480 Int)) (and (<= c_~i~0 (+ v_~i~0_480 c_~j~0)) (<= (div (+ v_~i~0_478 (* v_~i~0_480 (- 1))) (- 2)) (+ v_~i~0_478 1)) (<= (div (+ (* v_~i~0_478 (- 1)) 1) (- 2)) 1) (<= c_~j~0 (+ v_~i~0_478 v_~i~0_480 1)))) is different from true [2019-12-27 19:19:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:45,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:45,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:45,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1455472972] [2019-12-27 19:19:45,035 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:45,036 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:45,038 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:45,038 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:45,038 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:45,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:45,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:45,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:45,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=203, Unknown=1, NotChecked=30, Total=306 [2019-12-27 19:19:45,039 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:19:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:49,334 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 19:19:49,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:49,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:49,336 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:19:49,336 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:19:49,336 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=158, Invalid=395, Unknown=3, NotChecked=44, Total=600 [2019-12-27 19:19:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:19:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 127. [2019-12-27 19:19:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:49,340 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:49,340 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:49,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:49,340 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:49,341 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:49,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:49,544 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:49,544 INFO L82 PathProgramCache]: Analyzing trace with hash 150596889, now seen corresponding path program 144 times [2019-12-27 19:19:49,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:49,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175997184] [2019-12-27 19:19:49,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:49,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175997184] [2019-12-27 19:19:49,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394121597] [2019-12-27 19:19:49,632 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:49,676 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:19:49,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:49,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:49,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:56,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:56,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:56,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2129543979] [2019-12-27 19:19:56,058 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:56,059 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:56,062 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:56,062 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:56,062 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:56,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:56,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:56,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:56,063 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:20:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:00,508 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 19:20:00,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:00,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:00,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:00,509 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:20:00,509 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:20:00,510 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=165, Invalid=433, Unknown=2, NotChecked=0, Total=600 [2019-12-27 19:20:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:20:00,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2019-12-27 19:20:00,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:20:00,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:20:00,512 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:20:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:00,513 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:20:00,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:00,513 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:20:00,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:00,513 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:00,513 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:00,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:00,714 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:00,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:00,714 INFO L82 PathProgramCache]: Analyzing trace with hash 150596982, now seen corresponding path program 145 times [2019-12-27 19:20:00,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:00,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292796137] [2019-12-27 19:20:00,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:00,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292796137] [2019-12-27 19:20:00,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861565079] [2019-12-27 19:20:00,817 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:00,880 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:00,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:01,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:01,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:01,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1821388885] [2019-12-27 19:20:01,305 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:01,306 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:01,309 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:20:01,309 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:01,310 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:01,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:01,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:01,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:01,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:01,310 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:20:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:01,627 INFO L93 Difference]: Finished difference Result 171 states and 369 transitions. [2019-12-27 19:20:01,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:01,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:01,628 INFO L225 Difference]: With dead ends: 171 [2019-12-27 19:20:01,628 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 19:20:01,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 19:20:01,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 124. [2019-12-27 19:20:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:20:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:20:01,631 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:20:01,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:01,632 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:20:01,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:20:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:01,632 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:01,632 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:01,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:01,833 INFO L410 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1087145971, now seen corresponding path program 146 times [2019-12-27 19:20:01,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:01,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464893419] [2019-12-27 19:20:01,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:01,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464893419] [2019-12-27 19:20:01,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275627889] [2019-12-27 19:20:01,951 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:02,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:02,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:02,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:02,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:02,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:02,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:02,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1904081587] [2019-12-27 19:20:02,246 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:02,247 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:02,250 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:02,250 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:02,250 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:02,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:02,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:02,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:02,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:02,252 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:20:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:02,484 INFO L93 Difference]: Finished difference Result 159 states and 336 transitions. [2019-12-27 19:20:02,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:02,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:02,485 INFO L225 Difference]: With dead ends: 159 [2019-12-27 19:20:02,485 INFO L226 Difference]: Without dead ends: 158 [2019-12-27 19:20:02,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-27 19:20:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 127. [2019-12-27 19:20:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:20:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 285 transitions. [2019-12-27 19:20:02,488 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 285 transitions. Word has length 14 [2019-12-27 19:20:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:02,489 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 285 transitions. [2019-12-27 19:20:02,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 285 transitions. [2019-12-27 19:20:02,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:02,489 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:02,489 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:02,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:02,690 INFO L410 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:02,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1087146064, now seen corresponding path program 147 times [2019-12-27 19:20:02,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:02,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850724944] [2019-12-27 19:20:02,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:02,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850724944] [2019-12-27 19:20:02,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965125726] [2019-12-27 19:20:02,787 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:02,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:20:02,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:02,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:02,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:02,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:02,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:02,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [511506792] [2019-12-27 19:20:02,965 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:02,966 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:02,974 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:02,974 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:02,974 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:02,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:02,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:02,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:02,975 INFO L87 Difference]: Start difference. First operand 127 states and 285 transitions. Second operand 10 states. [2019-12-27 19:20:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:03,242 INFO L93 Difference]: Finished difference Result 171 states and 363 transitions. [2019-12-27 19:20:03,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:03,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:03,244 INFO L225 Difference]: With dead ends: 171 [2019-12-27 19:20:03,244 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 19:20:03,244 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 19:20:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 131. [2019-12-27 19:20:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:03,247 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:03,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:03,247 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:03,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:03,247 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:03,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:03,248 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:03,248 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:03,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:03,449 INFO L410 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:03,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1087148854, now seen corresponding path program 148 times [2019-12-27 19:20:03,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:03,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054784378] [2019-12-27 19:20:03,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:03,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054784378] [2019-12-27 19:20:03,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195488150] [2019-12-27 19:20:03,541 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:03,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:20:03,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:03,582 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:03,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:04,086 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_442 Int)) (and (<= c_~i~0 (+ v_~j~0_442 2)) (<= c_~j~0 (+ c_~i~0 v_~j~0_442)) (<= (div (+ (* v_~j~0_442 (- 1)) 1) (- 4)) 2))) is different from true [2019-12-27 19:20:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:04,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:04,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:04,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [389982921] [2019-12-27 19:20:04,087 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:04,088 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:04,090 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:04,090 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:04,091 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:04,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:04,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:04,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:04,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=206, Unknown=1, NotChecked=30, Total=306 [2019-12-27 19:20:04,091 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:04,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:04,574 INFO L93 Difference]: Finished difference Result 178 states and 379 transitions. [2019-12-27 19:20:04,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:20:04,575 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:04,576 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:04,576 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:04,576 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=198, Invalid=507, Unknown=1, NotChecked=50, Total=756 [2019-12-27 19:20:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 19:20:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:04,579 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:04,579 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:04,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:04,580 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:04,580 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:04,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:04,783 INFO L410 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:04,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:04,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1087148947, now seen corresponding path program 149 times [2019-12-27 19:20:04,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:04,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429382512] [2019-12-27 19:20:04,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:04,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429382512] [2019-12-27 19:20:04,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84929008] [2019-12-27 19:20:04,868 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:04,911 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:20:04,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:04,912 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:04,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:05,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:05,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:05,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2132057535] [2019-12-27 19:20:05,052 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:05,053 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:05,055 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:05,055 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:05,055 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:05,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:05,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:05,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:05,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:05,056 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:05,306 INFO L93 Difference]: Finished difference Result 178 states and 379 transitions. [2019-12-27 19:20:05,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:05,307 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:05,307 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:05,307 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:05,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:05,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2019-12-27 19:20:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:05,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:05,310 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:05,311 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:05,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:05,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:05,311 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:05,311 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:05,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:05,513 INFO L410 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:05,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1087235344, now seen corresponding path program 150 times [2019-12-27 19:20:05,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:05,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858330930] [2019-12-27 19:20:05,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:05,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858330930] [2019-12-27 19:20:05,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349178419] [2019-12-27 19:20:05,613 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:05,657 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:20:05,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:05,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:05,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:07,171 WARN L192 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 19:20:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:07,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:07,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:07,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1844371897] [2019-12-27 19:20:07,172 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:07,173 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:07,175 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:07,175 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:07,175 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:07,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:07,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:07,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:07,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:20:07,176 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:07,548 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2019-12-27 19:20:07,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:20:07,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:07,549 INFO L225 Difference]: With dead ends: 179 [2019-12-27 19:20:07,549 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 19:20:07,549 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=194, Invalid=507, Unknown=1, NotChecked=0, Total=702 [2019-12-27 19:20:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 19:20:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 130. [2019-12-27 19:20:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:07,552 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:07,552 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:07,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:07,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:07,552 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:07,552 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:07,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:07,753 INFO L410 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:07,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1087235437, now seen corresponding path program 151 times [2019-12-27 19:20:07,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:07,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300286278] [2019-12-27 19:20:07,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:07,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300286278] [2019-12-27 19:20:07,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467752712] [2019-12-27 19:20:07,856 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:07,899 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:07,900 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:10,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:10,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:10,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [576959058] [2019-12-27 19:20:10,640 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:10,641 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:10,644 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:10,644 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:10,644 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:10,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:10,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:10,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:10,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:10,645 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:14,264 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:20:14,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:20:14,264 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:14,265 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:20:14,265 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:20:14,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=193, Invalid=504, Unknown=5, NotChecked=0, Total=702 [2019-12-27 19:20:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:20:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2019-12-27 19:20:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:14,269 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:14,269 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:14,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:14,270 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:14,270 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:14,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:14,473 INFO L410 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:14,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1087238227, now seen corresponding path program 152 times [2019-12-27 19:20:14,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:14,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81087159] [2019-12-27 19:20:14,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:14,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81087159] [2019-12-27 19:20:14,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889973878] [2019-12-27 19:20:14,564 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:14,606 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:14,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:14,607 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:14,608 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:15,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:15,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:15,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [746818440] [2019-12-27 19:20:15,621 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:15,621 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:15,623 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:15,623 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:15,623 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:15,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:15,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:15,624 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:17,625 INFO L93 Difference]: Finished difference Result 183 states and 390 transitions. [2019-12-27 19:20:17,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:20:17,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:17,626 INFO L225 Difference]: With dead ends: 183 [2019-12-27 19:20:17,626 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 19:20:17,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=193, Invalid=507, Unknown=2, NotChecked=0, Total=702 [2019-12-27 19:20:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 19:20:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2019-12-27 19:20:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:17,629 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:17,629 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:17,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:17,629 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:17,629 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:17,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:17,830 INFO L410 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:17,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:17,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1087238320, now seen corresponding path program 153 times [2019-12-27 19:20:17,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:17,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139573174] [2019-12-27 19:20:17,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:17,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139573174] [2019-12-27 19:20:17,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851177722] [2019-12-27 19:20:17,915 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:17,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:20:17,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:17,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:17,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:18,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:18,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:18,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1832847072] [2019-12-27 19:20:18,122 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:18,122 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:18,125 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:18,125 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:18,125 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:18,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:18,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:18,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:18,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:18,126 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:18,359 INFO L93 Difference]: Finished difference Result 180 states and 384 transitions. [2019-12-27 19:20:18,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:18,359 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:18,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:18,360 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:20:18,360 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:20:18,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:18,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:20:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2019-12-27 19:20:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 19:20:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 19:20:18,363 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 19:20:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:18,363 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 19:20:18,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 19:20:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:18,364 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:18,364 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:18,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:18,565 INFO L410 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:18,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916534, now seen corresponding path program 154 times [2019-12-27 19:20:18,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:18,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995174045] [2019-12-27 19:20:18,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:18,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995174045] [2019-12-27 19:20:18,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102721910] [2019-12-27 19:20:18,651 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:18,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:20:18,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:18,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:18,695 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:19,018 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 19:20:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:19,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:19,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:19,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [436532319] [2019-12-27 19:20:19,292 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:19,293 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:19,295 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:19,295 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:19,295 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:19,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:19,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:19,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:19,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:19,296 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 19:20:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:19,645 INFO L93 Difference]: Finished difference Result 177 states and 378 transitions. [2019-12-27 19:20:19,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:19,646 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:19,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:19,646 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:20:19,646 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:20:19,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:20:19,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:20:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 129. [2019-12-27 19:20:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 19:20:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 19:20:19,650 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 19:20:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:19,650 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 19:20:19,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:19,650 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 19:20:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:19,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:19,651 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:19,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:19,854 INFO L410 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:19,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:19,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916627, now seen corresponding path program 155 times [2019-12-27 19:20:19,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:19,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216611873] [2019-12-27 19:20:19,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:19,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216611873] [2019-12-27 19:20:19,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29836537] [2019-12-27 19:20:19,939 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:19,984 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:20:19,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:19,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:19,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:25,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:25,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:25,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [379647999] [2019-12-27 19:20:25,408 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:25,409 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:25,412 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:25,412 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:25,412 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:25,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:25,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:25,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:25,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=228, Unknown=3, NotChecked=0, Total=306 [2019-12-27 19:20:25,413 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 19:20:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:31,780 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 19:20:31,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:31,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:31,781 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:31,781 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:31,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=176, Invalid=468, Unknown=6, NotChecked=0, Total=650 [2019-12-27 19:20:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 19:20:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:31,784 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:31,785 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:31,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:31,785 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:31,785 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:31,786 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:31,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:31,987 INFO L410 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:31,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:31,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919417, now seen corresponding path program 156 times [2019-12-27 19:20:31,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:31,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87632857] [2019-12-27 19:20:31,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:32,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87632857] [2019-12-27 19:20:32,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023861038] [2019-12-27 19:20:32,073 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:32,113 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:20:32,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:32,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:32,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:33,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:33,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:33,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1093339984] [2019-12-27 19:20:33,420 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:33,421 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:33,423 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:33,423 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:33,423 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:33,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:33,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:33,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:33,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=228, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:20:33,423 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:33,772 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:20:33,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:33,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:33,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:33,773 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:20:33,774 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:20:33,774 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=180, Invalid=469, Unknown=1, NotChecked=0, Total=650 [2019-12-27 19:20:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:20:33,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2019-12-27 19:20:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:33,777 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:33,777 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:33,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:33,777 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:33,777 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:33,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:33,978 INFO L410 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:33,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:33,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919510, now seen corresponding path program 157 times [2019-12-27 19:20:33,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:33,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56778793] [2019-12-27 19:20:33,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:34,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56778793] [2019-12-27 19:20:34,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262276798] [2019-12-27 19:20:34,087 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:34,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:34,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:34,525 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 19:20:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:35,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:35,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:35,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1809416000] [2019-12-27 19:20:35,832 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:35,833 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:35,834 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:35,834 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:35,834 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:35,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:35,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:35,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:35,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:35,835 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:36,956 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 19:20:36,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:36,957 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:36,958 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:36,958 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:36,958 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=181, Invalid=468, Unknown=1, NotChecked=0, Total=650 [2019-12-27 19:20:36,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2019-12-27 19:20:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:36,961 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:36,961 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:36,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:36,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:36,962 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:36,962 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:37,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:37,163 INFO L410 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:37,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1090005907, now seen corresponding path program 158 times [2019-12-27 19:20:37,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:37,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456863164] [2019-12-27 19:20:37,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:37,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456863164] [2019-12-27 19:20:37,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448047856] [2019-12-27 19:20:37,250 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:37,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:37,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:37,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:37,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:37,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:37,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:37,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [190152871] [2019-12-27 19:20:37,475 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:37,475 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:37,477 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:37,477 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:37,477 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:37,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:37,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:37,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:37,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:37,478 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:37,800 INFO L93 Difference]: Finished difference Result 184 states and 394 transitions. [2019-12-27 19:20:37,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:37,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:37,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:37,801 INFO L225 Difference]: With dead ends: 184 [2019-12-27 19:20:37,801 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 19:20:37,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:20:37,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 19:20:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 130. [2019-12-27 19:20:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:37,803 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:37,804 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:37,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:37,804 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:37,804 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:38,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:38,005 INFO L410 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:38,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:38,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1090006000, now seen corresponding path program 159 times [2019-12-27 19:20:38,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:38,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189419174] [2019-12-27 19:20:38,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:38,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189419174] [2019-12-27 19:20:38,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954375226] [2019-12-27 19:20:38,096 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:38,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:20:38,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:38,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:38,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:39,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:39,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:39,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1498343247] [2019-12-27 19:20:39,703 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:39,704 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:39,706 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:39,706 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:39,706 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:39,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:39,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:39,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=229, Unknown=2, NotChecked=0, Total=306 [2019-12-27 19:20:39,707 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:40,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:40,410 INFO L93 Difference]: Finished difference Result 183 states and 393 transitions. [2019-12-27 19:20:40,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:20:40,410 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:40,411 INFO L225 Difference]: With dead ends: 183 [2019-12-27 19:20:40,411 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 19:20:40,411 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=196, Invalid=504, Unknown=2, NotChecked=0, Total=702 [2019-12-27 19:20:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 19:20:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2019-12-27 19:20:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:40,414 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:40,414 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:40,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:40,414 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:40,414 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:40,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:40,615 INFO L410 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:40,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:40,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1090008790, now seen corresponding path program 160 times [2019-12-27 19:20:40,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:40,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292641151] [2019-12-27 19:20:40,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:40,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292641151] [2019-12-27 19:20:40,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325051506] [2019-12-27 19:20:40,704 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:40,751 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:20:40,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:40,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:40,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:40,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:40,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:40,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1503710841] [2019-12-27 19:20:40,912 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:40,913 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:40,915 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:40,915 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:40,915 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:40,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:40,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:40,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:40,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:40,915 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:41,238 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:20:41,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:41,238 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:41,239 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:20:41,239 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:20:41,239 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:20:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:20:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2019-12-27 19:20:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:41,242 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:41,242 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:41,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:41,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:41,243 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:41,243 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:41,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:41,444 INFO L410 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:41,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1090008883, now seen corresponding path program 161 times [2019-12-27 19:20:41,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:41,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302850663] [2019-12-27 19:20:41,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:41,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302850663] [2019-12-27 19:20:41,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118852498] [2019-12-27 19:20:41,525 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:41,567 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:20:41,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:41,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:41,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:41,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:41,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:41,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1987988879] [2019-12-27 19:20:41,708 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:41,709 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:41,711 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:41,711 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:41,711 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:41,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:41,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:41,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:41,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:41,712 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:41,932 INFO L93 Difference]: Finished difference Result 176 states and 377 transitions. [2019-12-27 19:20:41,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:41,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:41,933 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:20:41,933 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:20:41,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:20:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 128. [2019-12-27 19:20:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 19:20:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 19:20:41,936 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 19:20:41,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:41,936 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 19:20:41,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:41,936 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 19:20:41,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:41,937 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:41,937 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:42,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:42,138 INFO L410 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:42,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:42,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1173033424, now seen corresponding path program 162 times [2019-12-27 19:20:42,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:42,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625736899] [2019-12-27 19:20:42,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:42,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625736899] [2019-12-27 19:20:42,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936793387] [2019-12-27 19:20:42,229 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:42,271 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:20:42,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:42,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:42,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:42,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:42,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:42,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1467978383] [2019-12-27 19:20:42,387 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:42,387 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:42,390 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:42,390 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:42,390 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:42,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:42,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:42,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:42,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:42,391 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. [2019-12-27 19:20:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:42,616 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2019-12-27 19:20:42,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:42,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:42,617 INFO L225 Difference]: With dead ends: 179 [2019-12-27 19:20:42,617 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 19:20:42,617 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 19:20:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2019-12-27 19:20:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 19:20:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 19:20:42,620 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 19:20:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:42,620 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 19:20:42,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 19:20:42,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:42,620 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:42,621 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:42,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:42,822 INFO L410 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:42,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1173033517, now seen corresponding path program 163 times [2019-12-27 19:20:42,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:42,823 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950338660] [2019-12-27 19:20:42,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:42,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950338660] [2019-12-27 19:20:42,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506009833] [2019-12-27 19:20:42,913 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:42,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:42,953 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:43,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:43,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:43,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [426693771] [2019-12-27 19:20:43,069 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:43,070 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:43,072 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:43,072 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:43,072 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:43,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:43,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:43,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:43,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:43,073 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. [2019-12-27 19:20:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:43,348 INFO L93 Difference]: Finished difference Result 176 states and 383 transitions. [2019-12-27 19:20:43,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:43,348 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:43,349 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:20:43,349 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:20:43,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:43,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:20:43,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 131. [2019-12-27 19:20:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:43,352 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:43,353 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:43,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:43,353 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:43,353 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:43,354 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:43,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:43,554 INFO L410 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:43,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1173036307, now seen corresponding path program 164 times [2019-12-27 19:20:43,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:43,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070822409] [2019-12-27 19:20:43,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:43,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070822409] [2019-12-27 19:20:43,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501046601] [2019-12-27 19:20:43,644 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:43,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:43,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:43,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:43,686 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:43,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:43,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:43,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1350985939] [2019-12-27 19:20:43,866 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:43,866 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:43,868 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:43,868 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:43,868 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:43,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:43,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:43,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:43,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:43,869 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:44,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:44,181 INFO L93 Difference]: Finished difference Result 177 states and 384 transitions. [2019-12-27 19:20:44,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:44,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:44,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:44,182 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:20:44,182 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:20:44,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:20:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 131. [2019-12-27 19:20:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:44,185 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:44,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:44,185 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:44,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:44,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:44,188 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:44,188 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:44,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:44,392 INFO L410 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1173036400, now seen corresponding path program 165 times [2019-12-27 19:20:44,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:44,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112440206] [2019-12-27 19:20:44,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:44,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112440206] [2019-12-27 19:20:44,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705311654] [2019-12-27 19:20:44,489 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:44,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:20:44,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:44,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:44,534 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:44,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:44,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:44,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1461584064] [2019-12-27 19:20:44,669 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:44,670 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:44,672 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:44,672 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:44,672 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:44,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:44,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:44,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:44,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:44,673 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:44,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:44,937 INFO L93 Difference]: Finished difference Result 176 states and 383 transitions. [2019-12-27 19:20:44,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:44,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:44,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:44,938 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:20:44,938 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:20:44,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:20:44,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 130. [2019-12-27 19:20:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:44,941 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:44,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:44,941 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:44,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:44,941 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:44,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:44,942 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:44,942 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:45,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:45,143 INFO L410 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1173122797, now seen corresponding path program 166 times [2019-12-27 19:20:45,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:45,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940656751] [2019-12-27 19:20:45,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:45,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940656751] [2019-12-27 19:20:45,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129755536] [2019-12-27 19:20:45,226 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:45,267 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:20:45,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:45,268 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:45,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:45,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:45,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:45,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1226901232] [2019-12-27 19:20:45,384 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:45,385 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:45,386 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:45,386 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:45,387 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:45,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:45,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:45,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:45,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:45,387 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:45,626 INFO L93 Difference]: Finished difference Result 179 states and 386 transitions. [2019-12-27 19:20:45,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:45,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:45,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:45,627 INFO L225 Difference]: With dead ends: 179 [2019-12-27 19:20:45,627 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 19:20:45,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 19:20:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 130. [2019-12-27 19:20:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:45,630 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:45,630 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:45,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:45,631 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:45,631 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:45,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:45,835 INFO L410 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:45,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:45,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1173122890, now seen corresponding path program 167 times [2019-12-27 19:20:45,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:45,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232730061] [2019-12-27 19:20:45,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:45,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232730061] [2019-12-27 19:20:45,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018416912] [2019-12-27 19:20:45,925 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:45,967 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:20:45,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:45,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:45,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:46,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:46,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:46,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562968868] [2019-12-27 19:20:46,123 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:46,124 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:46,128 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:46,128 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:46,128 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:46,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:46,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:46,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:46,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:46,129 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:46,475 INFO L93 Difference]: Finished difference Result 172 states and 376 transitions. [2019-12-27 19:20:46,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:46,476 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:46,477 INFO L225 Difference]: With dead ends: 172 [2019-12-27 19:20:46,477 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 19:20:46,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:46,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 19:20:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 131. [2019-12-27 19:20:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:46,481 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:46,481 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:46,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:46,482 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:46,482 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:46,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:46,686 INFO L410 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:46,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:46,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1173125680, now seen corresponding path program 168 times [2019-12-27 19:20:46,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:46,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476022428] [2019-12-27 19:20:46,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:46,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476022428] [2019-12-27 19:20:46,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619237178] [2019-12-27 19:20:46,780 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:46,822 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:20:46,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:46,823 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:46,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:46,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:46,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:46,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1836811852] [2019-12-27 19:20:46,948 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:46,949 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:46,950 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:46,950 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:46,950 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:46,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:46,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:46,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:46,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:46,951 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:47,222 INFO L93 Difference]: Finished difference Result 175 states and 379 transitions. [2019-12-27 19:20:47,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:47,222 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:47,223 INFO L225 Difference]: With dead ends: 175 [2019-12-27 19:20:47,223 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 19:20:47,223 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 19:20:47,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2019-12-27 19:20:47,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:47,226 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:47,227 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:47,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:47,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:47,227 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:47,227 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:47,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:47,428 INFO L410 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:47,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:47,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1173125773, now seen corresponding path program 169 times [2019-12-27 19:20:47,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:47,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894200928] [2019-12-27 19:20:47,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:47,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894200928] [2019-12-27 19:20:47,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161958203] [2019-12-27 19:20:47,539 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:47,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:47,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:47,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:47,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:47,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [888347462] [2019-12-27 19:20:47,798 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:47,799 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:47,802 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:47,802 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:47,802 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:47,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:47,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:47,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:47,803 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:48,045 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 19:20:48,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:48,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:48,046 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:20:48,046 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:20:48,046 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:20:48,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 129. [2019-12-27 19:20:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 19:20:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 19:20:48,049 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 19:20:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:48,049 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 19:20:48,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 19:20:48,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:48,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:48,050 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:48,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:48,250 INFO L410 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:48,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1175803987, now seen corresponding path program 170 times [2019-12-27 19:20:48,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:48,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974187110] [2019-12-27 19:20:48,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:48,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974187110] [2019-12-27 19:20:48,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475302060] [2019-12-27 19:20:48,342 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:48,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:48,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:48,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:48,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:48,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:48,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:48,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2101324859] [2019-12-27 19:20:48,525 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:48,525 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:48,527 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:48,527 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:48,527 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:48,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:48,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:48,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:48,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:48,528 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 19:20:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:48,777 INFO L93 Difference]: Finished difference Result 182 states and 389 transitions. [2019-12-27 19:20:48,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:48,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:48,778 INFO L225 Difference]: With dead ends: 182 [2019-12-27 19:20:48,778 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 19:20:48,779 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 19:20:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 129. [2019-12-27 19:20:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 19:20:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 19:20:48,782 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 19:20:48,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:48,782 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 19:20:48,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:48,782 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 19:20:48,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:48,783 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:48,783 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:48,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:48,985 INFO L410 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1175804080, now seen corresponding path program 171 times [2019-12-27 19:20:48,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:48,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692647435] [2019-12-27 19:20:48,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:49,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692647435] [2019-12-27 19:20:49,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712054732] [2019-12-27 19:20:49,085 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:49,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:20:49,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:49,136 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:49,137 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:49,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:49,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:49,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1397342695] [2019-12-27 19:20:49,592 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:49,592 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:49,595 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:49,595 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:49,595 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:49,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:49,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:49,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:49,596 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 19:20:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:51,007 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 19:20:51,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:51,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:51,008 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:51,008 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:51,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=164, Invalid=434, Unknown=2, NotChecked=0, Total=600 [2019-12-27 19:20:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 19:20:51,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:51,011 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:51,011 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:51,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:51,011 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:51,011 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:51,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:51,212 INFO L410 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1175806870, now seen corresponding path program 172 times [2019-12-27 19:20:51,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:51,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525847111] [2019-12-27 19:20:51,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:51,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525847111] [2019-12-27 19:20:51,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378343829] [2019-12-27 19:20:51,300 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:51,344 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:20:51,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:51,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:51,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:53,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:53,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:53,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1173057848] [2019-12-27 19:20:53,493 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:53,494 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:53,496 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:53,496 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:53,496 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:53,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:53,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:53,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:53,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=229, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:20:53,496 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:55,334 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 19:20:55,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:55,334 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:55,335 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:55,335 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:55,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=164, Invalid=435, Unknown=1, NotChecked=0, Total=600 [2019-12-27 19:20:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:55,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 19:20:55,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:55,338 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:55,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:55,338 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:55,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:55,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:55,338 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:55,339 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:55,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:55,539 INFO L410 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:55,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1175806963, now seen corresponding path program 173 times [2019-12-27 19:20:55,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:55,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592580623] [2019-12-27 19:20:55,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:55,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592580623] [2019-12-27 19:20:55,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435988679] [2019-12-27 19:20:55,626 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:55,670 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:20:55,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:55,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:55,672 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:57,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:57,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:57,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1932671153] [2019-12-27 19:20:57,890 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:57,891 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:57,892 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:57,893 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:57,893 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:57,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:57,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:57,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:57,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=229, Unknown=2, NotChecked=0, Total=306 [2019-12-27 19:20:57,893 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:59,570 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 19:20:59,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:59,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:59,571 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:59,571 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:59,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=165, Invalid=430, Unknown=5, NotChecked=0, Total=600 [2019-12-27 19:20:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2019-12-27 19:20:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:59,575 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:59,575 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:59,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:59,576 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:59,576 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:59,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:59,776 INFO L410 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:59,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:59,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893360, now seen corresponding path program 174 times [2019-12-27 19:20:59,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:59,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121518692] [2019-12-27 19:20:59,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:59,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121518692] [2019-12-27 19:20:59,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786905367] [2019-12-27 19:20:59,870 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:59,912 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:20:59,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:59,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:59,913 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:00,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:00,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:21:00,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [574842059] [2019-12-27 19:21:00,062 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:00,063 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:00,065 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:21:00,065 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:00,065 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:21:00,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:00,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:00,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:00,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:21:00,066 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:21:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:00,326 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:21:00,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:21:00,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:00,328 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:21:00,328 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:21:00,328 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:21:00,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:21:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 130. [2019-12-27 19:21:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:21:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:21:00,331 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:21:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:00,331 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:21:00,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:21:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:00,331 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:00,332 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:00,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:00,532 INFO L410 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893453, now seen corresponding path program 175 times [2019-12-27 19:21:00,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:00,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925139347] [2019-12-27 19:21:00,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:00,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925139347] [2019-12-27 19:21:00,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106532134] [2019-12-27 19:21:00,622 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:00,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:00,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:01,222 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_592 Int)) (and (<= c_~j~0 (+ v_~i~0_592 3)) (<= (div (+ (* v_~i~0_592 (- 1)) 2) (- 3)) 3) (<= c_~i~0 (+ c_~j~0 v_~i~0_592)))) is different from true [2019-12-27 19:21:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:01,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:01,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:21:01,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [444554007] [2019-12-27 19:21:01,223 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:01,224 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:01,225 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:21:01,233 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:01,233 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:21:01,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:01,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:01,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:01,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=205, Unknown=1, NotChecked=30, Total=306 [2019-12-27 19:21:01,233 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:21:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:01,531 INFO L93 Difference]: Finished difference Result 177 states and 384 transitions. [2019-12-27 19:21:01,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:21:01,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:01,533 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:21:01,533 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:21:01,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=433, Unknown=1, NotChecked=46, Total=650 [2019-12-27 19:21:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:21:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 131. [2019-12-27 19:21:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:21:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:21:01,536 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:21:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:01,536 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:21:01,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:21:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:01,536 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:01,536 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:01,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:01,740 INFO L410 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:01,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1175896243, now seen corresponding path program 176 times [2019-12-27 19:21:01,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:01,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840487060] [2019-12-27 19:21:01,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:01,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840487060] [2019-12-27 19:21:01,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713502700] [2019-12-27 19:21:01,836 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:01,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:01,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:01,884 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:01,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:02,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:02,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:21:02,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1772727756] [2019-12-27 19:21:02,025 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:02,026 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:02,028 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:21:02,028 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:02,029 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:21:02,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:02,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:02,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:02,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:21:02,031 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:21:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:02,306 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 19:21:02,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:21:02,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:02,307 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:21:02,307 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:21:02,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:21:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:21:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 131. [2019-12-27 19:21:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:21:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:21:02,316 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:21:02,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:02,317 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:21:02,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:21:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:02,317 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:02,317 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:02,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:02,521 INFO L410 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:02,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1175896336, now seen corresponding path program 177 times [2019-12-27 19:21:02,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:02,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772237182] [2019-12-27 19:21:02,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:02,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772237182] [2019-12-27 19:21:02,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063091580] [2019-12-27 19:21:02,605 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:02,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:21:02,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:02,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:02,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:02,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:02,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:21:02,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1565572858] [2019-12-27 19:21:02,793 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:02,794 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:02,796 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:21:02,796 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:02,796 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:21:02,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:02,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:02,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:02,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:21:02,797 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:21:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:03,032 INFO L93 Difference]: Finished difference Result 167 states and 359 transitions. [2019-12-27 19:21:03,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:21:03,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:03,033 INFO L225 Difference]: With dead ends: 167 [2019-12-27 19:21:03,033 INFO L226 Difference]: Without dead ends: 166 [2019-12-27 19:21:03,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:21:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-27 19:21:03,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 128. [2019-12-27 19:21:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 19:21:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 19:21:03,037 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 19:21:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:03,037 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 19:21:03,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 19:21:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:03,038 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:03,038 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:03,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:03,241 INFO L410 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:03,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:03,241 INFO L82 PathProgramCache]: Analyzing trace with hash 144143923, now seen corresponding path program 178 times [2019-12-27 19:21:03,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:03,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852827320] [2019-12-27 19:21:03,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:03,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852827320] [2019-12-27 19:21:03,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362434882] [2019-12-27 19:21:03,327 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:03,378 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:03,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:03,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:03,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:03,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:03,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:21:03,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [266560758] [2019-12-27 19:21:03,524 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:03,525 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:03,528 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:21:03,528 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:03,529 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 19:21:03,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:03,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:03,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:21:03,530 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. [2019-12-27 19:21:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:03,779 INFO L93 Difference]: Finished difference Result 160 states and 340 transitions. [2019-12-27 19:21:03,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:21:03,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:03,781 INFO L225 Difference]: With dead ends: 160 [2019-12-27 19:21:03,781 INFO L226 Difference]: Without dead ends: 159 [2019-12-27 19:21:03,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:21:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-27 19:21:03,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2019-12-27 19:21:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:21:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 285 transitions. [2019-12-27 19:21:03,784 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 285 transitions. Word has length 14 [2019-12-27 19:21:03,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:03,784 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 285 transitions. [2019-12-27 19:21:03,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:03,784 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 285 transitions. [2019-12-27 19:21:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:03,785 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:03,785 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:03,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:03,988 INFO L410 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:03,989 INFO L82 PathProgramCache]: Analyzing trace with hash 144146713, now seen corresponding path program 179 times [2019-12-27 19:21:03,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:03,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108397460] [2019-12-27 19:21:03,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:04,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108397460] [2019-12-27 19:21:04,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843782876] [2019-12-27 19:21:04,077 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:04,123 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:21:04,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:04,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:04,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:05,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:05,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:21:05,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [564214473] [2019-12-27 19:21:05,231 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:05,232 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:05,234 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 30 transitions. [2019-12-27 19:21:05,234 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:05,235 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:21:05,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:05,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:05,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:05,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:21:05,236 INFO L87 Difference]: Start difference. First operand 127 states and 285 transitions. Second operand 10 states. [2019-12-27 19:21:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:05,999 INFO L93 Difference]: Finished difference Result 171 states and 360 transitions. [2019-12-27 19:21:05,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:21:06,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:06,000 INFO L225 Difference]: With dead ends: 171 [2019-12-27 19:21:06,000 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 19:21:06,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=171, Invalid=427, Unknown=2, NotChecked=0, Total=600 [2019-12-27 19:21:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 19:21:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 128. [2019-12-27 19:21:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 19:21:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 19:21:06,003 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 19:21:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:06,003 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 19:21:06,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 19:21:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:06,004 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:06,004 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:06,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:06,205 INFO L410 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:06,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:06,205 INFO L82 PathProgramCache]: Analyzing trace with hash 144146806, now seen corresponding path program 180 times [2019-12-27 19:21:06,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:06,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014144049] [2019-12-27 19:21:06,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:06,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014144049] [2019-12-27 19:21:06,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241153906] [2019-12-27 19:21:06,295 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:06,340 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:21:06,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:06,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:06,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:06,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:06,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:21:06,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [387323580] [2019-12-27 19:21:06,490 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:06,491 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:06,493 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 30 transitions. [2019-12-27 19:21:06,493 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:06,494 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:21:06,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:06,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:06,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:06,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:21:06,494 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. [2019-12-27 19:21:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:06,747 INFO L93 Difference]: Finished difference Result 169 states and 358 transitions. [2019-12-27 19:21:06,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:21:06,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:06,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:06,749 INFO L225 Difference]: With dead ends: 169 [2019-12-27 19:21:06,749 INFO L226 Difference]: Without dead ends: 168 [2019-12-27 19:21:06,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:21:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-27 19:21:06,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 126. [2019-12-27 19:21:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:21:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 281 transitions. [2019-12-27 19:21:06,752 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 281 transitions. Word has length 14 [2019-12-27 19:21:06,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:06,752 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 281 transitions. [2019-12-27 19:21:06,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 281 transitions. [2019-12-27 19:21:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:06,753 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:06,753 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:06,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:06,954 INFO L410 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:06,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:06,954 INFO L82 PathProgramCache]: Analyzing trace with hash 144233203, now seen corresponding path program 181 times [2019-12-27 19:21:06,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:06,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686700869] [2019-12-27 19:21:06,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:07,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686700869] [2019-12-27 19:21:07,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583631431] [2019-12-27 19:21:07,048 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:07,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:07,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:09,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:09,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:21:09,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [174511156] [2019-12-27 19:21:09,578 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:09,579 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:09,581 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 19:21:09,581 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:09,582 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:21:09,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:09,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:09,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:09,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=229, Unknown=2, NotChecked=0, Total=306 [2019-12-27 19:21:09,582 INFO L87 Difference]: Start difference. First operand 126 states and 281 transitions. Second operand 10 states. [2019-12-27 19:21:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:09,893 INFO L93 Difference]: Finished difference Result 177 states and 372 transitions. [2019-12-27 19:21:09,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:21:09,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:09,894 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:21:09,894 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:21:09,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=173, Invalid=425, Unknown=2, NotChecked=0, Total=600 [2019-12-27 19:21:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:21:09,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 128. [2019-12-27 19:21:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 19:21:09,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 19:21:09,898 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 19:21:09,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:09,898 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 19:21:09,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:09,898 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 19:21:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:09,899 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:09,899 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:10,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:10,100 INFO L410 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:10,100 INFO L82 PathProgramCache]: Analyzing trace with hash 144233296, now seen corresponding path program 182 times [2019-12-27 19:21:10,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:10,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087866262] [2019-12-27 19:21:10,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:10,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087866262] [2019-12-27 19:21:10,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360463480] [2019-12-27 19:21:10,192 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:10,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:10,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:10,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:10,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2019-12-27 19:21:11,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:11,446 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 19:21:11,451 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 19:21:11,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 07:21:11 BasicIcfg [2019-12-27 19:21:11,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 19:21:11,452 INFO L168 Benchmark]: Toolchain (without parser) took 292337.46 ms. Allocated memory was 139.5 MB in the beginning and 207.6 MB in the end (delta: 68.2 MB). Free memory was 102.4 MB in the beginning and 143.3 MB in the end (delta: -40.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2019-12-27 19:21:11,452 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-12-27 19:21:11,453 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.47 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 162.7 MB in the end (delta: -60.6 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2019-12-27 19:21:11,453 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.95 ms. Allocated memory is still 203.4 MB. Free memory was 162.7 MB in the beginning and 160.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-12-27 19:21:11,453 INFO L168 Benchmark]: Boogie Preprocessor took 30.33 ms. Allocated memory is still 203.4 MB. Free memory was 160.8 MB in the beginning and 159.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-12-27 19:21:11,453 INFO L168 Benchmark]: RCFGBuilder took 394.32 ms. Allocated memory is still 203.4 MB. Free memory was 159.0 MB in the beginning and 138.9 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-12-27 19:21:11,454 INFO L168 Benchmark]: TraceAbstraction took 291224.78 ms. Allocated memory was 203.4 MB in the beginning and 207.6 MB in the end (delta: 4.2 MB). Free memory was 138.9 MB in the beginning and 143.3 MB in the end (delta: -4.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-27 19:21:11,455 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 637.47 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 162.7 MB in the end (delta: -60.6 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.95 ms. Allocated memory is still 203.4 MB. Free memory was 162.7 MB in the beginning and 160.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.33 ms. Allocated memory is still 203.4 MB. Free memory was 160.8 MB in the beginning and 159.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 394.32 ms. Allocated memory is still 203.4 MB. Free memory was 159.0 MB in the beginning and 138.9 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 291224.78 ms. Allocated memory was 203.4 MB in the beginning and 207.6 MB in the end (delta: 4.2 MB). Free memory was 138.9 MB in the beginning and 143.3 MB in the end (delta: -4.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 441 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 695 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 16 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 291.1s, OverallIterations: 198, TraceHistogramMax: 8, AutomataDifference: 100.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1773 SDtfs, 19092 SDslu, 9436 SDs, 0 SdLazy, 4973 SolverSat, 2782 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4886 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 3820 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 10731 ImplicationChecksByTransitivity, 225.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 197 MinimizatonAttempts, 6612 StatesRemovedByMinimization, 196 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 136.0s InterpolantComputationTime, 4953 NumberOfCodeBlocks, 4953 NumberOfCodeBlocksAsserted, 651 NumberOfCheckSat, 4564 ConstructedInterpolants, 181 QuantifiedInterpolants, 692240 SizeOfPredicates, 2 NumberOfNonLiveVariables, 17845 ConjunctsInSsa, 2094 ConjunctsInUnsatCore, 389 InterpolantComputations, 5 PerfectInterpolantSequences, 0/2958 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 could not prove your program: Timeout Completed graceful shutdown