/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.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 04:38:21,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 04:38:21,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 04:38:21,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 04:38:21,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 04:38:21,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 04:38:21,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 04:38:21,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 04:38:21,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 04:38:21,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 04:38:21,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 04:38:21,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 04:38:21,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 04:38:21,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 04:38:21,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 04:38:21,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 04:38:21,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 04:38:21,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 04:38:21,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 04:38:21,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 04:38:21,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 04:38:21,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 04:38:21,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 04:38:21,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 04:38:21,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 04:38:21,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 04:38:21,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 04:38:21,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 04:38:21,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 04:38:21,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 04:38:21,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 04:38:21,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 04:38:21,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 04:38:21,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 04:38:21,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 04:38:21,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 04:38:21,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 04:38:21,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 04:38:21,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 04:38:21,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 04:38:21,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 04:38:21,102 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.epf [2019-12-27 04:38:21,134 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 04:38:21,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 04:38:21,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 04:38:21,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 04:38:21,139 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 04:38:21,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 04:38:21,139 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 04:38:21,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 04:38:21,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 04:38:21,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 04:38:21,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 04:38:21,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 04:38:21,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 04:38:21,142 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 04:38:21,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 04:38:21,143 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 04:38:21,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 04:38:21,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 04:38:21,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 04:38:21,144 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 04:38:21,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 04:38:21,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 04:38:21,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 04:38:21,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 04:38:21,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 04:38:21,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 04:38:21,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 04:38:21,148 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 04:38:21,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 04:38:21,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 04:38:21,399 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 04:38:21,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 04:38:21,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 04:38:21,418 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 04:38:21,419 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 04:38:21,419 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-27 04:38:21,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959f9ce95/5745ebdce2d542b4acb4b18da0e037ae/FLAGa0c4868c3 [2019-12-27 04:38:21,996 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 04:38:21,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-27 04:38:22,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959f9ce95/5745ebdce2d542b4acb4b18da0e037ae/FLAGa0c4868c3 [2019-12-27 04:38:22,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959f9ce95/5745ebdce2d542b4acb4b18da0e037ae [2019-12-27 04:38:22,373 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 04:38:22,375 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 04:38:22,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 04:38:22,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 04:38:22,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 04:38:22,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:38:22" (1/1) ... [2019-12-27 04:38:22,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66c25f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:22, skipping insertion in model container [2019-12-27 04:38:22,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:38:22" (1/1) ... [2019-12-27 04:38:22,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 04:38:22,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 04:38:22,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:38:22,898 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 04:38:22,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:38:23,034 INFO L208 MainTranslator]: Completed translation [2019-12-27 04:38:23,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23 WrapperNode [2019-12-27 04:38:23,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 04:38:23,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 04:38:23,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 04:38:23,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 04:38:23,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 04:38:23,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 04:38:23,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 04:38:23,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 04:38:23,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 04:38:23,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 04:38:23,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 04:38:23,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 04:38:23,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (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 04:38:23,190 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 04:38:23,190 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 04:38:23,190 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 04:38:23,190 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 04:38:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 04:38:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 04:38:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 04:38:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 04:38:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 04:38:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 04:38:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 04:38:23,193 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 04:38:23,540 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 04:38:23,540 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 04:38:23,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 04:38:23 BoogieIcfgContainer [2019-12-27 04:38:23,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 04:38:23,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 04:38:23,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 04:38:23,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 04:38:23,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 04:38:22" (1/3) ... [2019-12-27 04:38:23,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757d1317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 04:38:23, skipping insertion in model container [2019-12-27 04:38:23,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (2/3) ... [2019-12-27 04:38:23,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757d1317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 04:38:23, skipping insertion in model container [2019-12-27 04:38:23,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 04:38:23" (3/3) ... [2019-12-27 04:38:23,550 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2019-12-27 04:38:23,559 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 04:38:23,559 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 04:38:23,566 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 04:38:23,567 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 04:38:23,593 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,594 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,594 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,594 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,594 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,595 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,595 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,595 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,595 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,596 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,596 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,596 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,596 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,596 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,597 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,597 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,597 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,597 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,598 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,598 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,598 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,599 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,599 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,599 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,599 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,600 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,600 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,600 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,600 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,600 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,605 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,605 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,605 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,606 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,606 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,606 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,612 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,612 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,612 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,612 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,613 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,613 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,627 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 04:38:23,644 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 04:38:23,644 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 04:38:23,645 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 04:38:23,645 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-27 04:38:23,645 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 04:38:23,645 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 04:38:23,645 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 04:38:23,645 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 04:38:23,657 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 04:38:23,659 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 04:38:23,703 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 04:38:23,704 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:38:23,712 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 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 04:38:23,716 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 04:38:23,736 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 04:38:23,737 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:38:23,739 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 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 04:38:23,741 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 04:38:23,742 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 04:38:24,913 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 04:38:25,026 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-27 04:38:25,026 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 04:38:25,031 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 04:38:25,043 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 04:38:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 04:38:25,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 04:38:25,052 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,053 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 04:38:25,054 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,061 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-27 04:38:25,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121726297] [2019-12-27 04:38:25,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,282 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 04:38:25,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121726297] [2019-12-27 04:38:25,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 04:38:25,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287200835] [2019-12-27 04:38:25,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 04:38:25,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 04:38:25,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 04:38:25,309 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 04:38:25,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,366 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 04:38:25,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 04:38:25,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 04:38:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,382 INFO L225 Difference]: With dead ends: 54 [2019-12-27 04:38:25,382 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 04:38:25,384 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 04:38:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 04:38:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 04:38:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 04:38:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 04:38:25,425 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 04:38:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,425 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 04:38:25,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 04:38:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 04:38:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 04:38:25,426 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,427 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,435 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,435 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-27 04:38:25,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035212679] [2019-12-27 04:38:25,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,570 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 04:38:25,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035212679] [2019-12-27 04:38:25,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 04:38:25,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775065302] [2019-12-27 04:38:25,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 04:38:25,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 04:38:25,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:38:25,573 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 04:38:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,601 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-27 04:38:25,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 04:38:25,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 04:38:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,603 INFO L225 Difference]: With dead ends: 42 [2019-12-27 04:38:25,604 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 04:38:25,605 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 04:38:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 04:38:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-27 04:38:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 04:38:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-27 04:38:25,613 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-27 04:38:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,613 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-27 04:38:25,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 04:38:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-27 04:38:25,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 04:38:25,614 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,614 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,614 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-27 04:38:25,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767498723] [2019-12-27 04:38:25,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,681 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 04:38:25,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767498723] [2019-12-27 04:38:25,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 04:38:25,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921086116] [2019-12-27 04:38:25,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 04:38:25,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 04:38:25,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:38:25,684 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-27 04:38:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,713 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 04:38:25,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 04:38:25,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 04:38:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,715 INFO L225 Difference]: With dead ends: 51 [2019-12-27 04:38:25,715 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 04:38:25,716 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 04:38:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 04:38:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 04:38:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 04:38:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 04:38:25,724 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 04:38:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,724 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 04:38:25,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 04:38:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 04:38:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 04:38:25,726 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,726 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,726 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-27 04:38:25,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053757120] [2019-12-27 04:38:25,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,799 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 04:38:25,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053757120] [2019-12-27 04:38:25,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462293986] [2019-12-27 04:38:25,801 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 04:38:25,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:25,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:25,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:25,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:25,923 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 04:38:25,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:25,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 04:38:25,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402934468] [2019-12-27 04:38:25,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:25,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:25,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:38:25,925 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-27 04:38:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,983 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-27 04:38:25,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:25,984 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 04:38:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,985 INFO L225 Difference]: With dead ends: 56 [2019-12-27 04:38:25,985 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 04:38:25,985 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:25,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 04:38:25,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-27 04:38:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 04:38:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-27 04:38:25,993 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-27 04:38:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,994 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-27 04:38:25,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-27 04:38:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 04:38:25,995 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,995 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:26,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:26,208 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:26,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-27 04:38:26,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:26,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675699935] [2019-12-27 04:38:26,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,311 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 04:38:26,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675699935] [2019-12-27 04:38:26,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368498503] [2019-12-27 04:38:26,312 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 04:38:26,378 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:26,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:26,379 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:26,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:26,416 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 04:38:26,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:26,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 04:38:26,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812366673] [2019-12-27 04:38:26,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:26,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:26,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:26,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:38:26,419 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-27 04:38:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:26,481 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-27 04:38:26,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:26,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 04:38:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:26,483 INFO L225 Difference]: With dead ends: 63 [2019-12-27 04:38:26,483 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 04:38:26,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:26,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 04:38:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-27 04:38:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 04:38:26,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 04:38:26,491 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 04:38:26,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:26,491 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 04:38:26,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 04:38:26,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:26,492 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:26,492 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:26,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:26,696 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:26,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:26,697 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-27 04:38:26,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:26,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606321000] [2019-12-27 04:38:26,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,790 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 04:38:26,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606321000] [2019-12-27 04:38:26,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62457589] [2019-12-27 04:38:26,791 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 04:38:26,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:26,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:26,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:26,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:26,906 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 04:38:26,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:26,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:26,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588026211] [2019-12-27 04:38:26,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:26,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:26,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:26,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:26,909 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-27 04:38:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,004 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-27 04:38:27,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 04:38:27,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 04:38:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,011 INFO L225 Difference]: With dead ends: 66 [2019-12-27 04:38:27,012 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 04:38:27,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 04:38:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 04:38:27,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-27 04:38:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 04:38:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-27 04:38:27,023 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-27 04:38:27,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,024 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-27 04:38:27,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-27 04:38:27,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,025 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,025 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:27,229 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-27 04:38:27,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355562134] [2019-12-27 04:38:27,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,345 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 04:38:27,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355562134] [2019-12-27 04:38:27,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:27,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:38:27,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447918138] [2019-12-27 04:38:27,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:38:27,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:38:27,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:27,347 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-27 04:38:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,398 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 04:38:27,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:27,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:38:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,403 INFO L225 Difference]: With dead ends: 68 [2019-12-27 04:38:27,403 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 04:38:27,404 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 04:38:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 04:38:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-27 04:38:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 04:38:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-27 04:38:27,411 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-27 04:38:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,412 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-27 04:38:27,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:38:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-27 04:38:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,413 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,413 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,413 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,414 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-27 04:38:27,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296910306] [2019-12-27 04:38:27,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,457 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 04:38:27,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296910306] [2019-12-27 04:38:27,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:27,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:38:27,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681000527] [2019-12-27 04:38:27,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:38:27,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:38:27,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:27,460 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-27 04:38:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,500 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 04:38:27,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:27,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:38:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,501 INFO L225 Difference]: With dead ends: 68 [2019-12-27 04:38:27,501 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 04:38:27,502 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 04:38:27,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 04:38:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-12-27 04:38:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 04:38:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-27 04:38:27,508 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-27 04:38:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,508 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-27 04:38:27,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:38:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-27 04:38:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,509 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,509 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,509 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,510 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-27 04:38:27,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064288957] [2019-12-27 04:38:27,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,562 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 04:38:27,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064288957] [2019-12-27 04:38:27,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125816230] [2019-12-27 04:38:27,563 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 04:38:27,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:27,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:27,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:27,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:27,680 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 04:38:27,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:27,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:27,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15173196] [2019-12-27 04:38:27,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:27,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:27,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:27,682 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-27 04:38:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,753 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-27 04:38:27,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 04:38:27,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 04:38:27,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,754 INFO L225 Difference]: With dead ends: 77 [2019-12-27 04:38:27,754 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 04:38:27,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 04:38:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 04:38:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-27 04:38:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 04:38:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 04:38:27,761 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 04:38:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,761 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 04:38:27,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 04:38:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:27,763 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,763 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:27,973 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,973 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-27 04:38:27,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401045155] [2019-12-27 04:38:27,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:28,084 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 04:38:28,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401045155] [2019-12-27 04:38:28,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682432659] [2019-12-27 04:38:28,085 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 04:38:28,132 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:28,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:28,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:28,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:28,229 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 04:38:28,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:28,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:28,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297697657] [2019-12-27 04:38:28,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:28,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:28,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:28,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:28,231 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-27 04:38:28,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:28,350 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-27 04:38:28,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:38:28,350 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 04:38:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:28,351 INFO L225 Difference]: With dead ends: 80 [2019-12-27 04:38:28,351 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 04:38:28,351 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 04:38:28,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-27 04:38:28,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 04:38:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 04:38:28,357 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 04:38:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:28,357 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 04:38:28,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 04:38:28,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:28,358 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:28,359 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:28,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:28,564 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-27 04:38:28,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:28,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383481963] [2019-12-27 04:38:28,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:28,639 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 04:38:28,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383481963] [2019-12-27 04:38:28,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249800994] [2019-12-27 04:38:28,640 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 04:38:28,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:28,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:28,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:28,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:28,742 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 04:38:28,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:28,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:28,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203611543] [2019-12-27 04:38:28,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:28,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:28,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:28,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:28,744 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-27 04:38:28,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:28,825 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-27 04:38:28,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:28,826 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:28,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:28,826 INFO L225 Difference]: With dead ends: 85 [2019-12-27 04:38:28,826 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 04:38:28,827 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 04:38:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 04:38:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2019-12-27 04:38:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 04:38:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 04:38:28,832 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 04:38:28,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:28,832 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 04:38:28,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:28,833 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 04:38:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:28,834 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:28,834 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:29,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,048 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:29,048 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-27 04:38:29,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:29,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030314371] [2019-12-27 04:38:29,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:29,124 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 04:38:29,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030314371] [2019-12-27 04:38:29,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356370180] [2019-12-27 04:38:29,124 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 04:38:29,179 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:29,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:29,180 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:29,182 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:29,233 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 04:38:29,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:29,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:29,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590405166] [2019-12-27 04:38:29,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:29,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:29,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:29,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:29,235 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-27 04:38:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:29,317 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 04:38:29,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:29,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:29,318 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:38:29,318 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:38:29,318 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 04:38:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:38:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2019-12-27 04:38:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 04:38:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 04:38:29,323 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 04:38:29,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:29,324 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 04:38:29,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 04:38:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:29,325 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:29,325 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:29,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,534 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:29,535 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-27 04:38:29,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:29,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139449156] [2019-12-27 04:38:29,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:29,605 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 04:38:29,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139449156] [2019-12-27 04:38:29,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57943822] [2019-12-27 04:38:29,606 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 04:38:29,655 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:29,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:29,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:29,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:29,715 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 04:38:29,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:29,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:29,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760918659] [2019-12-27 04:38:29,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:29,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:29,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:29,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:29,718 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-27 04:38:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:29,816 INFO L93 Difference]: Finished difference Result 94 states and 194 transitions. [2019-12-27 04:38:29,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:29,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:29,818 INFO L225 Difference]: With dead ends: 94 [2019-12-27 04:38:29,818 INFO L226 Difference]: Without dead ends: 92 [2019-12-27 04:38:29,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-27 04:38:29,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2019-12-27 04:38:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 04:38:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 04:38:29,823 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 04:38:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:29,823 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 04:38:29,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 04:38:29,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:29,824 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:29,824 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:30,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:30,028 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:30,029 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 6 times [2019-12-27 04:38:30,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:30,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549641980] [2019-12-27 04:38:30,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:30,108 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 04:38:30,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549641980] [2019-12-27 04:38:30,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256647297] [2019-12-27 04:38:30,109 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 04:38:30,157 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:38:30,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:30,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:30,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:30,231 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 04:38:30,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:30,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:30,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401402476] [2019-12-27 04:38:30,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:30,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:30,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:30,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:30,233 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 10 states. [2019-12-27 04:38:30,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:30,348 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 04:38:30,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:30,348 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:30,350 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:38:30,350 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:38:30,351 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:38:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2019-12-27 04:38:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 04:38:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 04:38:30,355 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 04:38:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:30,356 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 04:38:30,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 04:38:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:30,357 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:30,357 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:30,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:30,566 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:30,567 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-27 04:38:30,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:30,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599198980] [2019-12-27 04:38:30,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:30,634 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 04:38:30,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599198980] [2019-12-27 04:38:30,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423209525] [2019-12-27 04:38:30,635 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 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 04:38:30,690 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:30,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:30,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:30,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:30,795 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 04:38:30,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:30,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:30,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480406466] [2019-12-27 04:38:30,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:30,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:30,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:30,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:30,798 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-27 04:38:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:30,942 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-27 04:38:30,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:38:30,944 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 04:38:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:30,946 INFO L225 Difference]: With dead ends: 92 [2019-12-27 04:38:30,946 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 04:38:30,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 04:38:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-27 04:38:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 04:38:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 04:38:30,957 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 04:38:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:30,959 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 04:38:30,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 04:38:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:30,960 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:30,960 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:31,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:31,166 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-27 04:38:31,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:31,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246587831] [2019-12-27 04:38:31,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:31,286 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 04:38:31,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246587831] [2019-12-27 04:38:31,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494789650] [2019-12-27 04:38:31,287 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 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 04:38:31,365 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:31,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:31,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:31,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:31,513 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 04:38:31,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:31,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:31,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775957559] [2019-12-27 04:38:31,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:31,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:31,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:31,516 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-27 04:38:31,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:31,706 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-27 04:38:31,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:31,707 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 04:38:31,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:31,709 INFO L225 Difference]: With dead ends: 95 [2019-12-27 04:38:31,709 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 04:38:31,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-27 04:38:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 04:38:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-27 04:38:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 04:38:31,719 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 04:38:31,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:31,720 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 04:38:31,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 04:38:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:31,721 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:31,721 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:31,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:31,927 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:31,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 7 times [2019-12-27 04:38:31,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:31,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439308777] [2019-12-27 04:38:31,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:32,051 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 04:38:32,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439308777] [2019-12-27 04:38:32,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541867816] [2019-12-27 04:38:32,052 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:32,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:32,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:32,279 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 04:38:32,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:32,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:32,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283870862] [2019-12-27 04:38:32,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:32,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:32,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:32,282 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 04:38:32,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:32,500 INFO L93 Difference]: Finished difference Result 104 states and 220 transitions. [2019-12-27 04:38:32,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:38:32,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:32,502 INFO L225 Difference]: With dead ends: 104 [2019-12-27 04:38:32,502 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 04:38:32,503 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 04:38:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2019-12-27 04:38:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 04:38:32,510 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 04:38:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:32,511 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 04:38:32,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 04:38:32,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:32,512 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:32,513 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:32,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:32,719 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:32,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:32,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 8 times [2019-12-27 04:38:32,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:32,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256288592] [2019-12-27 04:38:32,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:32,808 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 04:38:32,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256288592] [2019-12-27 04:38:32,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385461801] [2019-12-27 04:38:32,810 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:32,905 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:32,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:32,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:32,908 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:33,031 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 04:38:33,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:33,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:33,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862913593] [2019-12-27 04:38:33,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:33,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:33,036 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 04:38:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:33,167 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2019-12-27 04:38:33,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:33,168 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:33,169 INFO L225 Difference]: With dead ends: 110 [2019-12-27 04:38:33,169 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 04:38:33,169 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 04:38:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 84. [2019-12-27 04:38:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 04:38:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 04:38:33,176 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 04:38:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:33,177 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 04:38:33,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 04:38:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:33,177 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:33,177 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:33,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:33,381 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:33,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 9 times [2019-12-27 04:38:33,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:33,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179043360] [2019-12-27 04:38:33,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:33,446 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 04:38:33,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179043360] [2019-12-27 04:38:33,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810515445] [2019-12-27 04:38:33,447 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 04:38:33,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:33,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:33,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:33,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:33,626 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 04:38:33,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:33,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:33,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284127023] [2019-12-27 04:38:33,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:33,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:33,628 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-27 04:38:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:33,820 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 04:38:33,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:38:33,820 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:33,821 INFO L225 Difference]: With dead ends: 107 [2019-12-27 04:38:33,821 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 04:38:33,822 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:38:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 04:38:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2019-12-27 04:38:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 04:38:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 04:38:33,826 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 04:38:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:33,827 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 04:38:33,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 04:38:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:33,827 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:33,828 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:34,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:34,035 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:34,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 10 times [2019-12-27 04:38:34,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:34,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020600485] [2019-12-27 04:38:34,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:34,123 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 04:38:34,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020600485] [2019-12-27 04:38:34,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758844191] [2019-12-27 04:38:34,123 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 04:38:34,171 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:34,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:34,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:34,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:34,282 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 04:38:34,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:34,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:34,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600661596] [2019-12-27 04:38:34,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:34,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:34,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:34,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:34,284 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-27 04:38:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:34,466 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-27 04:38:34,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:34,466 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:34,468 INFO L225 Difference]: With dead ends: 117 [2019-12-27 04:38:34,468 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 04:38:34,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 04:38:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2019-12-27 04:38:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 183 transitions. [2019-12-27 04:38:34,473 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 183 transitions. Word has length 11 [2019-12-27 04:38:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:34,473 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 183 transitions. [2019-12-27 04:38:34,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 183 transitions. [2019-12-27 04:38:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:34,474 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:34,474 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:34,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:34,678 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:34,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 11 times [2019-12-27 04:38:34,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:34,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324162375] [2019-12-27 04:38:34,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:34,750 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 04:38:34,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324162375] [2019-12-27 04:38:34,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929681371] [2019-12-27 04:38:34,751 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 04:38:34,794 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:34,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:34,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:34,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:34,892 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 04:38:34,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:34,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:34,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561135485] [2019-12-27 04:38:34,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:34,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:34,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:34,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:34,894 INFO L87 Difference]: Start difference. First operand 83 states and 183 transitions. Second operand 12 states. [2019-12-27 04:38:35,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:35,085 INFO L93 Difference]: Finished difference Result 121 states and 250 transitions. [2019-12-27 04:38:35,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:35,085 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:35,087 INFO L225 Difference]: With dead ends: 121 [2019-12-27 04:38:35,087 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 04:38:35,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 04:38:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2019-12-27 04:38:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 04:38:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 04:38:35,093 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 04:38:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:35,094 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 04:38:35,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 04:38:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:35,095 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:35,095 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:35,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:35,299 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:35,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 12 times [2019-12-27 04:38:35,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:35,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200988127] [2019-12-27 04:38:35,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,354 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 04:38:35,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200988127] [2019-12-27 04:38:35,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754498016] [2019-12-27 04:38:35,355 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 04:38:35,399 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:38:35,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:35,400 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:35,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:35,464 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 04:38:35,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:35,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:35,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445206904] [2019-12-27 04:38:35,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:35,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:35,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:35,466 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-27 04:38:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:35,650 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-27 04:38:35,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:35,650 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:35,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:35,651 INFO L225 Difference]: With dead ends: 117 [2019-12-27 04:38:35,652 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 04:38:35,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:38:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 04:38:35,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2019-12-27 04:38:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 04:38:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-27 04:38:35,656 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-27 04:38:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:35,656 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-27 04:38:35,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-27 04:38:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:35,657 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:35,657 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:35,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:35,857 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:35,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 13 times [2019-12-27 04:38:35,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:35,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89673590] [2019-12-27 04:38:35,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,920 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 04:38:35,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89673590] [2019-12-27 04:38:35,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023200349] [2019-12-27 04:38:35,921 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 04:38:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,967 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:35,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:36,044 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 04:38:36,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:36,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:36,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364183288] [2019-12-27 04:38:36,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:36,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:36,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:36,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:36,046 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-27 04:38:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:36,224 INFO L93 Difference]: Finished difference Result 108 states and 224 transitions. [2019-12-27 04:38:36,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:36,227 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:36,228 INFO L225 Difference]: With dead ends: 108 [2019-12-27 04:38:36,228 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 04:38:36,228 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 04:38:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2019-12-27 04:38:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 04:38:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-27 04:38:36,232 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-27 04:38:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:36,232 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-27 04:38:36,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-27 04:38:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:36,233 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:36,233 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:36,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:36,437 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-27 04:38:36,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:36,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624658213] [2019-12-27 04:38:36,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:36,509 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 04:38:36,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624658213] [2019-12-27 04:38:36,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576218058] [2019-12-27 04:38:36,510 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 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 04:38:36,562 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:36,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:36,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:36,564 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:36,649 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 04:38:36,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:36,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:36,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176753126] [2019-12-27 04:38:36,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:36,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:36,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:36,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:36,651 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-27 04:38:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:36,783 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 04:38:36,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:36,783 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 04:38:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:36,784 INFO L225 Difference]: With dead ends: 107 [2019-12-27 04:38:36,784 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 04:38:36,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-27 04:38:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 04:38:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-27 04:38:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 04:38:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 04:38:36,789 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 04:38:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:36,789 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 04:38:36,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 04:38:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:36,791 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:36,792 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:36,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:36,996 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-27 04:38:36,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:36,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498086452] [2019-12-27 04:38:36,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:37,076 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 04:38:37,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498086452] [2019-12-27 04:38:37,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522025291] [2019-12-27 04:38:37,076 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 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 04:38:37,129 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:38:37,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:37,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:37,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:37,229 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 04:38:37,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:37,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:37,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495131593] [2019-12-27 04:38:37,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:37,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:37,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:37,231 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 16 states. [2019-12-27 04:38:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:37,402 INFO L93 Difference]: Finished difference Result 110 states and 234 transitions. [2019-12-27 04:38:37,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:37,404 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-27 04:38:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:37,405 INFO L225 Difference]: With dead ends: 110 [2019-12-27 04:38:37,405 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 04:38:37,405 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 04:38:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2019-12-27 04:38:37,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 04:38:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 04:38:37,409 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 04:38:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:37,409 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 04:38:37,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 04:38:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:37,410 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:37,410 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:37,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:37,614 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:37,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:37,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 14 times [2019-12-27 04:38:37,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:37,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868954602] [2019-12-27 04:38:37,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:37,680 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 04:38:37,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868954602] [2019-12-27 04:38:37,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516238830] [2019-12-27 04:38:37,680 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 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 04:38:37,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:37,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:37,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:37,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:37,841 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 04:38:37,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:37,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:37,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351172414] [2019-12-27 04:38:37,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:37,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:37,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:37,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:37,844 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 04:38:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:38,079 INFO L93 Difference]: Finished difference Result 121 states and 257 transitions. [2019-12-27 04:38:38,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:38,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:38,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:38,087 INFO L225 Difference]: With dead ends: 121 [2019-12-27 04:38:38,087 INFO L226 Difference]: Without dead ends: 120 [2019-12-27 04:38:38,088 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:38,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-27 04:38:38,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2019-12-27 04:38:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 04:38:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 04:38:38,092 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 04:38:38,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:38,092 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 04:38:38,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 04:38:38,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:38,093 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:38,093 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:38,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:38,294 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:38,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:38,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 15 times [2019-12-27 04:38:38,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:38,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339918031] [2019-12-27 04:38:38,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:38,367 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 04:38:38,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339918031] [2019-12-27 04:38:38,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373770383] [2019-12-27 04:38:38,368 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 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 04:38:38,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:38,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:38,419 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:38,421 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:38,523 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 04:38:38,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:38,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:38,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044473403] [2019-12-27 04:38:38,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:38,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:38,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:38,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:38,524 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 04:38:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:38,805 INFO L93 Difference]: Finished difference Result 130 states and 275 transitions. [2019-12-27 04:38:38,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:38,807 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:38,808 INFO L225 Difference]: With dead ends: 130 [2019-12-27 04:38:38,808 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 04:38:38,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 04:38:38,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 96. [2019-12-27 04:38:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 04:38:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 04:38:38,811 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 04:38:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:38,812 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 04:38:38,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:38,812 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 04:38:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:38,812 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:38,813 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:39,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:39,013 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:39,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 16 times [2019-12-27 04:38:39,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:39,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020537884] [2019-12-27 04:38:39,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:39,132 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 04:38:39,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020537884] [2019-12-27 04:38:39,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236832997] [2019-12-27 04:38:39,133 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:39,209 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:39,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:39,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:39,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:40,751 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 04:38:40,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:40,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:40,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960859506] [2019-12-27 04:38:40,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:40,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:40,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:40,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=132, Unknown=1, NotChecked=0, Total=182 [2019-12-27 04:38:40,752 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 04:38:41,276 WARN L192 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2019-12-27 04:38:41,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:41,600 INFO L93 Difference]: Finished difference Result 134 states and 282 transitions. [2019-12-27 04:38:41,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:41,601 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:41,602 INFO L225 Difference]: With dead ends: 134 [2019-12-27 04:38:41,602 INFO L226 Difference]: Without dead ends: 133 [2019-12-27 04:38:41,602 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=145, Invalid=316, Unknown=1, NotChecked=0, Total=462 [2019-12-27 04:38:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-12-27 04:38:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 96. [2019-12-27 04:38:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 04:38:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 04:38:41,620 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 04:38:41,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:41,620 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 04:38:41,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:41,620 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 04:38:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:41,621 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:41,621 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:41,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:41,825 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 17 times [2019-12-27 04:38:41,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:41,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274828885] [2019-12-27 04:38:41,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:41,957 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 04:38:41,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274828885] [2019-12-27 04:38:41,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446952587] [2019-12-27 04:38:41,958 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 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 04:38:42,030 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:42,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:42,031 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:42,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:42,166 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 04:38:42,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:42,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:42,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757404129] [2019-12-27 04:38:42,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:42,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:42,168 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 04:38:42,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:42,385 INFO L93 Difference]: Finished difference Result 131 states and 274 transitions. [2019-12-27 04:38:42,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:42,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:42,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:42,387 INFO L225 Difference]: With dead ends: 131 [2019-12-27 04:38:42,387 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 04:38:42,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 04:38:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 97. [2019-12-27 04:38:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 04:38:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 04:38:42,391 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 04:38:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:42,391 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 04:38:42,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 04:38:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:42,392 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:42,392 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:42,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:42,593 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 18 times [2019-12-27 04:38:42,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:42,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524833507] [2019-12-27 04:38:42,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:42,666 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 04:38:42,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524833507] [2019-12-27 04:38:42,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536931327] [2019-12-27 04:38:42,667 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 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 04:38:42,711 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:42,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:42,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:42,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:42,838 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 04:38:42,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:42,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:42,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136984695] [2019-12-27 04:38:42,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:42,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:42,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:42,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:42,840 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-27 04:38:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:43,126 INFO L93 Difference]: Finished difference Result 144 states and 305 transitions. [2019-12-27 04:38:43,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:43,129 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:43,130 INFO L225 Difference]: With dead ends: 144 [2019-12-27 04:38:43,130 INFO L226 Difference]: Without dead ends: 142 [2019-12-27 04:38:43,131 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:38:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-27 04:38:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2019-12-27 04:38:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 04:38:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 04:38:43,135 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 04:38:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:43,135 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 04:38:43,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 04:38:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:43,136 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:43,136 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:43,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:43,339 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:43,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 19 times [2019-12-27 04:38:43,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:43,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156341846] [2019-12-27 04:38:43,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:43,474 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 04:38:43,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156341846] [2019-12-27 04:38:43,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513227513] [2019-12-27 04:38:43,475 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 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 04:38:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:43,517 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:43,518 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:43,661 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 04:38:43,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:43,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:43,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053606871] [2019-12-27 04:38:43,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:43,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:43,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:43,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:43,663 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 04:38:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:44,169 INFO L93 Difference]: Finished difference Result 138 states and 292 transitions. [2019-12-27 04:38:44,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:44,169 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:44,170 INFO L225 Difference]: With dead ends: 138 [2019-12-27 04:38:44,170 INFO L226 Difference]: Without dead ends: 137 [2019-12-27 04:38:44,171 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:38:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-27 04:38:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 100. [2019-12-27 04:38:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 04:38:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 229 transitions. [2019-12-27 04:38:44,175 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 229 transitions. Word has length 12 [2019-12-27 04:38:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:44,175 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 229 transitions. [2019-12-27 04:38:44,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 229 transitions. [2019-12-27 04:38:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:44,176 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:44,176 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:44,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:44,379 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:44,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:44,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 20 times [2019-12-27 04:38:44,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:44,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058066844] [2019-12-27 04:38:44,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:44,450 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 04:38:44,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058066844] [2019-12-27 04:38:44,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695730127] [2019-12-27 04:38:44,451 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 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 04:38:44,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:44,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:44,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:44,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:44,626 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 04:38:44,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:44,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:44,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959970268] [2019-12-27 04:38:44,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:44,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:44,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:44,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:44,628 INFO L87 Difference]: Start difference. First operand 100 states and 229 transitions. Second operand 14 states. [2019-12-27 04:38:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:44,908 INFO L93 Difference]: Finished difference Result 133 states and 284 transitions. [2019-12-27 04:38:44,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:44,908 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:44,909 INFO L225 Difference]: With dead ends: 133 [2019-12-27 04:38:44,909 INFO L226 Difference]: Without dead ends: 132 [2019-12-27 04:38:44,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:38:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-27 04:38:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 99. [2019-12-27 04:38:44,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 04:38:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 04:38:44,912 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 04:38:44,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:44,912 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 04:38:44,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 04:38:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:44,913 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:44,913 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:45,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:45,113 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:45,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:45,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 21 times [2019-12-27 04:38:45,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:45,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075902394] [2019-12-27 04:38:45,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:45,192 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 04:38:45,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075902394] [2019-12-27 04:38:45,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194712718] [2019-12-27 04:38:45,192 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 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 04:38:45,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:45,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:45,238 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:45,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:45,894 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 04:38:45,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:45,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:45,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884460843] [2019-12-27 04:38:45,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:45,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:45,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:45,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:45,896 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 04:38:46,199 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 04:38:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:46,470 INFO L93 Difference]: Finished difference Result 150 states and 311 transitions. [2019-12-27 04:38:46,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:46,471 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:46,472 INFO L225 Difference]: With dead ends: 150 [2019-12-27 04:38:46,472 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 04:38:46,473 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2019-12-27 04:38:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 04:38:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2019-12-27 04:38:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 04:38:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 04:38:46,478 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 04:38:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:46,479 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 04:38:46,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 04:38:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:46,480 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:46,480 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:46,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:46,680 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 22 times [2019-12-27 04:38:46,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:46,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069329948] [2019-12-27 04:38:46,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:46,758 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 04:38:46,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069329948] [2019-12-27 04:38:46,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852529214] [2019-12-27 04:38:46,759 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:46,805 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:46,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:46,806 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:46,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:46,956 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 04:38:46,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:46,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:46,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995927251] [2019-12-27 04:38:46,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:46,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:46,958 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 04:38:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:47,415 INFO L93 Difference]: Finished difference Result 142 states and 300 transitions. [2019-12-27 04:38:47,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:47,416 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:47,417 INFO L225 Difference]: With dead ends: 142 [2019-12-27 04:38:47,417 INFO L226 Difference]: Without dead ends: 140 [2019-12-27 04:38:47,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:38:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-12-27 04:38:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 95. [2019-12-27 04:38:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-12-27 04:38:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 218 transitions. [2019-12-27 04:38:47,424 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 218 transitions. Word has length 12 [2019-12-27 04:38:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:47,424 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 218 transitions. [2019-12-27 04:38:47,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 218 transitions. [2019-12-27 04:38:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:47,427 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:47,427 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:47,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:47,632 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:47,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 23 times [2019-12-27 04:38:47,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:47,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537612976] [2019-12-27 04:38:47,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,758 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 04:38:47,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537612976] [2019-12-27 04:38:47,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208200698] [2019-12-27 04:38:47,759 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 04:38:47,821 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:47,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:47,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:47,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:47,942 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 04:38:47,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:47,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:47,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114423296] [2019-12-27 04:38:47,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:47,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:47,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:47,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:47,946 INFO L87 Difference]: Start difference. First operand 95 states and 218 transitions. Second operand 14 states. [2019-12-27 04:38:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:48,184 INFO L93 Difference]: Finished difference Result 156 states and 323 transitions. [2019-12-27 04:38:48,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:48,185 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:48,186 INFO L225 Difference]: With dead ends: 156 [2019-12-27 04:38:48,186 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 04:38:48,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:48,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 04:38:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2019-12-27 04:38:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 04:38:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 230 transitions. [2019-12-27 04:38:48,190 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 230 transitions. Word has length 12 [2019-12-27 04:38:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:48,190 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 230 transitions. [2019-12-27 04:38:48,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 230 transitions. [2019-12-27 04:38:48,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:48,192 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:48,192 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:48,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:48,396 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:48,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:48,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 24 times [2019-12-27 04:38:48,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:48,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025105451] [2019-12-27 04:38:48,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:48,469 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 04:38:48,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025105451] [2019-12-27 04:38:48,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729418373] [2019-12-27 04:38:48,469 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 04:38:48,512 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:48,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:48,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:48,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:48,584 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 04:38:48,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:48,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:48,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076131165] [2019-12-27 04:38:48,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:48,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:48,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:48,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:48,586 INFO L87 Difference]: Start difference. First operand 98 states and 230 transitions. Second operand 14 states. [2019-12-27 04:38:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:48,812 INFO L93 Difference]: Finished difference Result 150 states and 320 transitions. [2019-12-27 04:38:48,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:48,812 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:48,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:48,814 INFO L225 Difference]: With dead ends: 150 [2019-12-27 04:38:48,814 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 04:38:48,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 04:38:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 98. [2019-12-27 04:38:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 04:38:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 230 transitions. [2019-12-27 04:38:48,819 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 230 transitions. Word has length 12 [2019-12-27 04:38:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:48,819 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 230 transitions. [2019-12-27 04:38:48,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 230 transitions. [2019-12-27 04:38:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:48,820 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:48,820 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:49,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:49,023 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:49,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 25 times [2019-12-27 04:38:49,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:49,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813888991] [2019-12-27 04:38:49,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,101 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 04:38:49,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813888991] [2019-12-27 04:38:49,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40047966] [2019-12-27 04:38:49,102 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 04:38:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:49,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:49,271 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 04:38:49,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:49,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:49,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458186604] [2019-12-27 04:38:49,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:49,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:49,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:49,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:49,273 INFO L87 Difference]: Start difference. First operand 98 states and 230 transitions. Second operand 14 states. [2019-12-27 04:38:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:49,592 INFO L93 Difference]: Finished difference Result 146 states and 310 transitions. [2019-12-27 04:38:49,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:49,592 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:49,593 INFO L225 Difference]: With dead ends: 146 [2019-12-27 04:38:49,593 INFO L226 Difference]: Without dead ends: 144 [2019-12-27 04:38:49,593 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-12-27 04:38:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 98. [2019-12-27 04:38:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 04:38:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 230 transitions. [2019-12-27 04:38:49,596 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 230 transitions. Word has length 12 [2019-12-27 04:38:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:49,597 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 230 transitions. [2019-12-27 04:38:49,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 230 transitions. [2019-12-27 04:38:49,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:49,597 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:49,598 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:49,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:49,801 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 26 times [2019-12-27 04:38:49,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:49,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147436738] [2019-12-27 04:38:49,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,865 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 04:38:49,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147436738] [2019-12-27 04:38:49,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236252169] [2019-12-27 04:38:49,866 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 04:38:49,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:49,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:49,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:49,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:50,019 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 04:38:50,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:50,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:50,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119347062] [2019-12-27 04:38:50,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:50,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:50,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:50,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:50,021 INFO L87 Difference]: Start difference. First operand 98 states and 230 transitions. Second operand 14 states. [2019-12-27 04:38:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:50,238 INFO L93 Difference]: Finished difference Result 131 states and 279 transitions. [2019-12-27 04:38:50,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:50,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:50,240 INFO L225 Difference]: With dead ends: 131 [2019-12-27 04:38:50,240 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 04:38:50,240 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 04:38:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2019-12-27 04:38:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 04:38:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 04:38:50,245 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 04:38:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:50,245 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 04:38:50,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 04:38:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:50,246 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:50,246 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:50,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:50,449 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:50,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 27 times [2019-12-27 04:38:50,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:50,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657713641] [2019-12-27 04:38:50,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:50,515 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 04:38:50,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657713641] [2019-12-27 04:38:50,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802700888] [2019-12-27 04:38:50,515 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 04:38:50,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:50,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:50,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:50,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:50,693 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 04:38:50,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:50,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:50,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133430882] [2019-12-27 04:38:50,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:50,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:50,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:50,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:50,696 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 04:38:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:50,927 INFO L93 Difference]: Finished difference Result 138 states and 286 transitions. [2019-12-27 04:38:50,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:50,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:50,928 INFO L225 Difference]: With dead ends: 138 [2019-12-27 04:38:50,928 INFO L226 Difference]: Without dead ends: 137 [2019-12-27 04:38:50,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-27 04:38:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2019-12-27 04:38:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 04:38:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2019-12-27 04:38:50,932 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 12 [2019-12-27 04:38:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:50,932 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2019-12-27 04:38:50,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2019-12-27 04:38:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:50,933 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:50,933 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:51,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:51,136 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:51,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:51,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284461, now seen corresponding path program 28 times [2019-12-27 04:38:51,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:51,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537775223] [2019-12-27 04:38:51,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:51,230 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 04:38:51,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537775223] [2019-12-27 04:38:51,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244448171] [2019-12-27 04:38:51,231 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 04:38:51,295 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:51,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:51,297 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:51,305 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:51,449 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 04:38:51,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:51,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:51,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637851565] [2019-12-27 04:38:51,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:51,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:51,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:51,452 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand 14 states. [2019-12-27 04:38:51,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:51,761 INFO L93 Difference]: Finished difference Result 121 states and 248 transitions. [2019-12-27 04:38:51,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:51,762 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:51,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:51,763 INFO L225 Difference]: With dead ends: 121 [2019-12-27 04:38:51,763 INFO L226 Difference]: Without dead ends: 120 [2019-12-27 04:38:51,763 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-12-27 04:38:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-27 04:38:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2019-12-27 04:38:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 04:38:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2019-12-27 04:38:51,766 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 12 [2019-12-27 04:38:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:51,766 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2019-12-27 04:38:51,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2019-12-27 04:38:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:51,767 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:51,767 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:51,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:51,970 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:51,971 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-27 04:38:51,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:51,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819197025] [2019-12-27 04:38:51,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:52,048 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 04:38:52,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819197025] [2019-12-27 04:38:52,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324345294] [2019-12-27 04:38:52,049 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:52,089 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:38:52,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:52,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:52,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:52,188 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 04:38:52,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:52,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:52,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43006054] [2019-12-27 04:38:52,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:52,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:52,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:52,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:52,190 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand 16 states. [2019-12-27 04:38:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:52,364 INFO L93 Difference]: Finished difference Result 122 states and 258 transitions. [2019-12-27 04:38:52,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:52,364 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-27 04:38:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:52,365 INFO L225 Difference]: With dead ends: 122 [2019-12-27 04:38:52,365 INFO L226 Difference]: Without dead ends: 121 [2019-12-27 04:38:52,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-27 04:38:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2019-12-27 04:38:52,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 04:38:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-27 04:38:52,370 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-27 04:38:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:52,370 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-27 04:38:52,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-27 04:38:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:52,371 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:52,371 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:52,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:52,574 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:52,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1688428305, now seen corresponding path program 7 times [2019-12-27 04:38:52,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:52,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539188099] [2019-12-27 04:38:52,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:52,660 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 04:38:52,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539188099] [2019-12-27 04:38:52,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887974811] [2019-12-27 04:38:52,660 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 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 04:38:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:52,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:52,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:52,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 04:38:52,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-27 04:38:52,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970984067] [2019-12-27 04:38:52,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 04:38:52,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:52,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 04:38:52,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:38:52,793 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 9 states. [2019-12-27 04:38:52,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:52,822 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2019-12-27 04:38:52,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:52,822 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 04:38:52,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:52,824 INFO L225 Difference]: With dead ends: 149 [2019-12-27 04:38:52,824 INFO L226 Difference]: Without dead ends: 139 [2019-12-27 04:38:52,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:38:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-27 04:38:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-12-27 04:38:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 04:38:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-27 04:38:52,830 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 13 [2019-12-27 04:38:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:52,830 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-27 04:38:52,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 04:38:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-27 04:38:52,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:52,831 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:52,831 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:53,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:53,035 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:53,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 29 times [2019-12-27 04:38:53,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:53,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496428942] [2019-12-27 04:38:53,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:53,115 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 04:38:53,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496428942] [2019-12-27 04:38:53,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416679126] [2019-12-27 04:38:53,116 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 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 04:38:53,159 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:53,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:53,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:53,161 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:53,302 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 04:38:53,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:53,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:53,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248336892] [2019-12-27 04:38:53,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:53,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:53,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:53,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:53,305 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 16 states. [2019-12-27 04:38:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:53,642 INFO L93 Difference]: Finished difference Result 171 states and 390 transitions. [2019-12-27 04:38:53,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:53,642 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:53,643 INFO L225 Difference]: With dead ends: 171 [2019-12-27 04:38:53,643 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 04:38:53,644 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:38:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 04:38:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 141. [2019-12-27 04:38:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 04:38:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 338 transitions. [2019-12-27 04:38:53,648 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 338 transitions. Word has length 13 [2019-12-27 04:38:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:53,648 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 338 transitions. [2019-12-27 04:38:53,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:53,649 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 338 transitions. [2019-12-27 04:38:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:53,649 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:53,649 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:53,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:53,850 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:53,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:53,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 30 times [2019-12-27 04:38:53,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:53,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873619873] [2019-12-27 04:38:53,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:53,961 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 04:38:53,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873619873] [2019-12-27 04:38:53,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682167243] [2019-12-27 04:38:53,962 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:38:54,005 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:54,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:54,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:54,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:54,111 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 04:38:54,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:54,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:54,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563109914] [2019-12-27 04:38:54,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:54,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:54,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:54,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:54,114 INFO L87 Difference]: Start difference. First operand 141 states and 338 transitions. Second operand 16 states. [2019-12-27 04:38:54,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:54,463 INFO L93 Difference]: Finished difference Result 181 states and 412 transitions. [2019-12-27 04:38:54,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:38:54,464 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:54,466 INFO L225 Difference]: With dead ends: 181 [2019-12-27 04:38:54,466 INFO L226 Difference]: Without dead ends: 180 [2019-12-27 04:38:54,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:38:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-27 04:38:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 142. [2019-12-27 04:38:54,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 04:38:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 342 transitions. [2019-12-27 04:38:54,472 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 342 transitions. Word has length 13 [2019-12-27 04:38:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:54,472 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 342 transitions. [2019-12-27 04:38:54,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 342 transitions. [2019-12-27 04:38:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:54,473 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:54,473 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:54,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:54,676 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:54,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:54,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 31 times [2019-12-27 04:38:54,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:54,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145136998] [2019-12-27 04:38:54,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:54,765 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 04:38:54,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145136998] [2019-12-27 04:38:54,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285299991] [2019-12-27 04:38:54,766 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 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 04:38:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:54,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:54,811 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:55,252 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 04:38:55,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:55,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:55,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400653898] [2019-12-27 04:38:55,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:55,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:55,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:55,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:55,253 INFO L87 Difference]: Start difference. First operand 142 states and 342 transitions. Second operand 16 states. [2019-12-27 04:38:55,611 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2019-12-27 04:38:55,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:55,836 INFO L93 Difference]: Finished difference Result 183 states and 414 transitions. [2019-12-27 04:38:55,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:38:55,837 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:55,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:55,838 INFO L225 Difference]: With dead ends: 183 [2019-12-27 04:38:55,838 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 04:38:55,839 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:38:55,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 04:38:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 143. [2019-12-27 04:38:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 04:38:55,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 343 transitions. [2019-12-27 04:38:55,843 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 343 transitions. Word has length 13 [2019-12-27 04:38:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:55,843 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 343 transitions. [2019-12-27 04:38:55,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 343 transitions. [2019-12-27 04:38:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:55,844 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:55,844 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:56,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:56,045 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:56,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 32 times [2019-12-27 04:38:56,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:56,045 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628112300] [2019-12-27 04:38:56,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:56,133 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 04:38:56,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628112300] [2019-12-27 04:38:56,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453117004] [2019-12-27 04:38:56,134 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 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 04:38:56,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:56,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:56,191 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:56,192 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:56,367 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 04:38:56,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:56,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:56,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083240172] [2019-12-27 04:38:56,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:56,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:56,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:56,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:56,369 INFO L87 Difference]: Start difference. First operand 143 states and 343 transitions. Second operand 16 states. [2019-12-27 04:38:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:56,822 INFO L93 Difference]: Finished difference Result 190 states and 431 transitions. [2019-12-27 04:38:56,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:56,823 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:56,824 INFO L225 Difference]: With dead ends: 190 [2019-12-27 04:38:56,824 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 04:38:56,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:38:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 04:38:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 148. [2019-12-27 04:38:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 04:38:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 363 transitions. [2019-12-27 04:38:56,833 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 363 transitions. Word has length 13 [2019-12-27 04:38:56,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:56,834 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 363 transitions. [2019-12-27 04:38:56,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 363 transitions. [2019-12-27 04:38:56,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:56,834 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:56,835 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:57,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:57,038 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:57,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:57,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 33 times [2019-12-27 04:38:57,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:57,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837069352] [2019-12-27 04:38:57,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:57,119 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 04:38:57,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837069352] [2019-12-27 04:38:57,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765115747] [2019-12-27 04:38:57,120 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 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 04:38:57,163 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:57,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:57,164 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:57,165 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:58,366 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 04:38:58,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:58,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:58,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638457759] [2019-12-27 04:38:58,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:58,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:58,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:58,368 INFO L87 Difference]: Start difference. First operand 148 states and 363 transitions. Second operand 16 states. [2019-12-27 04:38:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:58,865 INFO L93 Difference]: Finished difference Result 204 states and 465 transitions. [2019-12-27 04:38:58,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:58,865 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:58,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:58,867 INFO L225 Difference]: With dead ends: 204 [2019-12-27 04:38:58,867 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 04:38:58,868 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:38:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 04:38:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 147. [2019-12-27 04:38:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 04:38:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 359 transitions. [2019-12-27 04:38:58,872 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 359 transitions. Word has length 13 [2019-12-27 04:38:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:58,873 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 359 transitions. [2019-12-27 04:38:58,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 359 transitions. [2019-12-27 04:38:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:58,873 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:58,874 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:59,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:59,077 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:59,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 34 times [2019-12-27 04:38:59,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:59,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478937724] [2019-12-27 04:38:59,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:59,151 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 04:38:59,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478937724] [2019-12-27 04:38:59,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531342958] [2019-12-27 04:38:59,151 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 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 04:38:59,195 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:59,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:59,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:59,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:00,832 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 04:39:00,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:00,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:00,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48620867] [2019-12-27 04:39:00,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:00,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:00,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:00,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=177, Unknown=2, NotChecked=0, Total=240 [2019-12-27 04:39:00,834 INFO L87 Difference]: Start difference. First operand 147 states and 359 transitions. Second operand 16 states. [2019-12-27 04:39:01,612 WARN L192 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:39:02,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:02,462 INFO L93 Difference]: Finished difference Result 203 states and 461 transitions. [2019-12-27 04:39:02,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:02,463 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:02,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:02,465 INFO L225 Difference]: With dead ends: 203 [2019-12-27 04:39:02,465 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 04:39:02,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=196, Invalid=452, Unknown=2, NotChecked=0, Total=650 [2019-12-27 04:39:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 04:39:02,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 148. [2019-12-27 04:39:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 04:39:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 363 transitions. [2019-12-27 04:39:02,471 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 363 transitions. Word has length 13 [2019-12-27 04:39:02,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:02,471 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 363 transitions. [2019-12-27 04:39:02,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 363 transitions. [2019-12-27 04:39:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:02,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:02,472 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:02,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:02,675 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 35 times [2019-12-27 04:39:02,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:02,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950533208] [2019-12-27 04:39:02,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:02,765 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 04:39:02,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950533208] [2019-12-27 04:39:02,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623023977] [2019-12-27 04:39:02,766 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 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 04:39:02,814 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:02,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:02,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:02,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:04,516 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 04:39:04,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:04,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:04,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636039319] [2019-12-27 04:39:04,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:04,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:04,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:04,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=176, Unknown=2, NotChecked=0, Total=240 [2019-12-27 04:39:04,518 INFO L87 Difference]: Start difference. First operand 148 states and 363 transitions. Second operand 16 states. [2019-12-27 04:39:05,086 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2019-12-27 04:39:06,736 WARN L192 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:39:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:07,570 INFO L93 Difference]: Finished difference Result 197 states and 449 transitions. [2019-12-27 04:39:07,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:07,571 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:07,572 INFO L225 Difference]: With dead ends: 197 [2019-12-27 04:39:07,573 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 04:39:07,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=235, Invalid=518, Unknown=3, NotChecked=0, Total=756 [2019-12-27 04:39:07,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 04:39:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 148. [2019-12-27 04:39:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 04:39:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 360 transitions. [2019-12-27 04:39:07,577 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 360 transitions. Word has length 13 [2019-12-27 04:39:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:07,578 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 360 transitions. [2019-12-27 04:39:07,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 360 transitions. [2019-12-27 04:39:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:07,578 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:07,579 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:07,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:07,782 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:07,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:07,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 36 times [2019-12-27 04:39:07,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:07,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381262225] [2019-12-27 04:39:07,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:07,862 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 04:39:07,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381262225] [2019-12-27 04:39:07,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78494973] [2019-12-27 04:39:07,862 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 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 04:39:07,907 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:07,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:07,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:07,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:08,061 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 04:39:08,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:08,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:08,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331653976] [2019-12-27 04:39:08,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:08,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:08,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:08,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:08,062 INFO L87 Difference]: Start difference. First operand 148 states and 360 transitions. Second operand 16 states. [2019-12-27 04:39:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:08,566 INFO L93 Difference]: Finished difference Result 219 states and 496 transitions. [2019-12-27 04:39:08,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:08,566 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:08,568 INFO L225 Difference]: With dead ends: 219 [2019-12-27 04:39:08,568 INFO L226 Difference]: Without dead ends: 217 [2019-12-27 04:39:08,569 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:39:08,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-27 04:39:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 151. [2019-12-27 04:39:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 04:39:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 372 transitions. [2019-12-27 04:39:08,573 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 372 transitions. Word has length 13 [2019-12-27 04:39:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:08,573 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 372 transitions. [2019-12-27 04:39:08,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 372 transitions. [2019-12-27 04:39:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:08,574 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:08,574 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:08,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:08,777 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:08,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 37 times [2019-12-27 04:39:08,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:08,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668567611] [2019-12-27 04:39:08,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:08,848 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 04:39:08,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668567611] [2019-12-27 04:39:08,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594237721] [2019-12-27 04:39:08,849 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:39:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:08,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:08,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:09,035 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 04:39:09,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:09,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:09,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823563357] [2019-12-27 04:39:09,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:09,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:09,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:09,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:09,036 INFO L87 Difference]: Start difference. First operand 151 states and 372 transitions. Second operand 16 states. [2019-12-27 04:39:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:09,933 INFO L93 Difference]: Finished difference Result 226 states and 512 transitions. [2019-12-27 04:39:09,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:09,933 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:09,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:09,936 INFO L225 Difference]: With dead ends: 226 [2019-12-27 04:39:09,936 INFO L226 Difference]: Without dead ends: 224 [2019-12-27 04:39:09,936 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-27 04:39:09,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 153. [2019-12-27 04:39:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 04:39:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 380 transitions. [2019-12-27 04:39:09,941 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 380 transitions. Word has length 13 [2019-12-27 04:39:09,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:09,941 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 380 transitions. [2019-12-27 04:39:09,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:09,941 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 380 transitions. [2019-12-27 04:39:09,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:09,942 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:09,942 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:10,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:10,144 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:10,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 38 times [2019-12-27 04:39:10,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:10,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833666011] [2019-12-27 04:39:10,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:10,223 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 04:39:10,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833666011] [2019-12-27 04:39:10,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076016303] [2019-12-27 04:39:10,223 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 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 04:39:10,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:10,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:10,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:10,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:10,412 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 04:39:10,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:10,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:10,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100472361] [2019-12-27 04:39:10,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:10,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:10,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:10,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:10,414 INFO L87 Difference]: Start difference. First operand 153 states and 380 transitions. Second operand 16 states. [2019-12-27 04:39:11,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:11,133 INFO L93 Difference]: Finished difference Result 222 states and 510 transitions. [2019-12-27 04:39:11,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:39:11,135 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:11,136 INFO L225 Difference]: With dead ends: 222 [2019-12-27 04:39:11,136 INFO L226 Difference]: Without dead ends: 220 [2019-12-27 04:39:11,137 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:39:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-27 04:39:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 155. [2019-12-27 04:39:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 04:39:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 385 transitions. [2019-12-27 04:39:11,141 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 385 transitions. Word has length 13 [2019-12-27 04:39:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:11,141 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 385 transitions. [2019-12-27 04:39:11,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 385 transitions. [2019-12-27 04:39:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:11,142 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:11,142 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:11,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:11,346 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:11,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:11,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 39 times [2019-12-27 04:39:11,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:11,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846610231] [2019-12-27 04:39:11,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:11,448 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 04:39:11,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846610231] [2019-12-27 04:39:11,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300002969] [2019-12-27 04:39:11,448 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 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 04:39:11,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:39:11,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:11,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:11,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:11,645 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 04:39:11,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:11,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:11,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142821787] [2019-12-27 04:39:11,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:11,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:11,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:11,648 INFO L87 Difference]: Start difference. First operand 155 states and 385 transitions. Second operand 16 states. [2019-12-27 04:39:12,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:12,204 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2019-12-27 04:39:12,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:12,205 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:12,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:12,206 INFO L225 Difference]: With dead ends: 214 [2019-12-27 04:39:12,206 INFO L226 Difference]: Without dead ends: 213 [2019-12-27 04:39:12,207 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:39:12,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-27 04:39:12,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 156. [2019-12-27 04:39:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 04:39:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 389 transitions. [2019-12-27 04:39:12,211 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 389 transitions. Word has length 13 [2019-12-27 04:39:12,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:12,212 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 389 transitions. [2019-12-27 04:39:12,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 389 transitions. [2019-12-27 04:39:12,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:12,213 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:12,213 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:12,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:12,416 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:12,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:12,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 40 times [2019-12-27 04:39:12,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:12,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627551082] [2019-12-27 04:39:12,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:12,494 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 04:39:12,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627551082] [2019-12-27 04:39:12,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737962806] [2019-12-27 04:39:12,495 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 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 04:39:12,539 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:12,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:12,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:12,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:12,726 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 04:39:12,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:12,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:12,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989446275] [2019-12-27 04:39:12,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:12,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:12,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:12,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:12,728 INFO L87 Difference]: Start difference. First operand 156 states and 389 transitions. Second operand 16 states. [2019-12-27 04:39:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:13,663 INFO L93 Difference]: Finished difference Result 216 states and 501 transitions. [2019-12-27 04:39:13,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:13,663 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:13,665 INFO L225 Difference]: With dead ends: 216 [2019-12-27 04:39:13,665 INFO L226 Difference]: Without dead ends: 215 [2019-12-27 04:39:13,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:39:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-27 04:39:13,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 155. [2019-12-27 04:39:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 04:39:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 385 transitions. [2019-12-27 04:39:13,669 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 385 transitions. Word has length 13 [2019-12-27 04:39:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:13,670 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 385 transitions. [2019-12-27 04:39:13,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 385 transitions. [2019-12-27 04:39:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:13,671 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:13,671 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:13,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:13,874 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:13,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 41 times [2019-12-27 04:39:13,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:13,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028040953] [2019-12-27 04:39:13,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:13,952 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 04:39:13,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028040953] [2019-12-27 04:39:13,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964226443] [2019-12-27 04:39:13,953 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 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 04:39:13,995 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:13,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:13,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:13,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:16,208 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 04:39:16,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:16,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:16,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822843859] [2019-12-27 04:39:16,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:16,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:16,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:16,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:16,209 INFO L87 Difference]: Start difference. First operand 155 states and 385 transitions. Second operand 16 states. [2019-12-27 04:39:18,334 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-27 04:39:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:18,903 INFO L93 Difference]: Finished difference Result 213 states and 495 transitions. [2019-12-27 04:39:18,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:18,903 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:18,905 INFO L225 Difference]: With dead ends: 213 [2019-12-27 04:39:18,905 INFO L226 Difference]: Without dead ends: 212 [2019-12-27 04:39:18,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:39:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-12-27 04:39:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 153. [2019-12-27 04:39:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 04:39:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 377 transitions. [2019-12-27 04:39:18,909 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 377 transitions. Word has length 13 [2019-12-27 04:39:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:18,909 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 377 transitions. [2019-12-27 04:39:18,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 377 transitions. [2019-12-27 04:39:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:18,910 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:18,910 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:19,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:19,112 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:19,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 42 times [2019-12-27 04:39:19,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:19,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349954151] [2019-12-27 04:39:19,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:19,196 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 04:39:19,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349954151] [2019-12-27 04:39:19,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183920741] [2019-12-27 04:39:19,196 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 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 04:39:19,247 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:19,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:19,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:19,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:19,386 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 04:39:19,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:19,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:19,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974182909] [2019-12-27 04:39:19,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:19,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:19,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:19,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:19,388 INFO L87 Difference]: Start difference. First operand 153 states and 377 transitions. Second operand 16 states. [2019-12-27 04:39:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:19,657 INFO L93 Difference]: Finished difference Result 176 states and 404 transitions. [2019-12-27 04:39:19,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:39:19,658 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:19,659 INFO L225 Difference]: With dead ends: 176 [2019-12-27 04:39:19,660 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 04:39:19,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:39:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 04:39:19,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 152. [2019-12-27 04:39:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 04:39:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 370 transitions. [2019-12-27 04:39:19,664 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 370 transitions. Word has length 13 [2019-12-27 04:39:19,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:19,664 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 370 transitions. [2019-12-27 04:39:19,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 370 transitions. [2019-12-27 04:39:19,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:19,665 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:19,665 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:19,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:19,869 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 43 times [2019-12-27 04:39:19,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:19,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533720649] [2019-12-27 04:39:19,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:19,960 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 04:39:19,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533720649] [2019-12-27 04:39:19,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724801020] [2019-12-27 04:39:19,961 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 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 04:39:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:20,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:20,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:20,717 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 04:39:20,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:20,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:20,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406327689] [2019-12-27 04:39:20,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:20,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:20,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:20,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:20,719 INFO L87 Difference]: Start difference. First operand 152 states and 370 transitions. Second operand 16 states. [2019-12-27 04:39:21,170 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-27 04:39:21,711 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-27 04:39:22,291 WARN L192 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:22,769 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:39:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:23,073 INFO L93 Difference]: Finished difference Result 228 states and 511 transitions. [2019-12-27 04:39:23,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:23,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:23,076 INFO L225 Difference]: With dead ends: 228 [2019-12-27 04:39:23,076 INFO L226 Difference]: Without dead ends: 226 [2019-12-27 04:39:23,076 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2019-12-27 04:39:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-27 04:39:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 155. [2019-12-27 04:39:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 04:39:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 382 transitions. [2019-12-27 04:39:23,080 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 382 transitions. Word has length 13 [2019-12-27 04:39:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:23,081 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 382 transitions. [2019-12-27 04:39:23,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 382 transitions. [2019-12-27 04:39:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:23,081 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:23,081 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:23,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:23,285 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:23,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 44 times [2019-12-27 04:39:23,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:23,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198768644] [2019-12-27 04:39:23,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:23,360 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 04:39:23,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198768644] [2019-12-27 04:39:23,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857875833] [2019-12-27 04:39:23,361 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 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 04:39:23,405 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:23,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:23,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:23,407 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:23,817 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 04:39:23,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:23,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:23,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017684138] [2019-12-27 04:39:23,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:23,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:23,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:23,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:23,819 INFO L87 Difference]: Start difference. First operand 155 states and 382 transitions. Second operand 16 states. [2019-12-27 04:39:24,339 WARN L192 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:39:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:24,707 INFO L93 Difference]: Finished difference Result 243 states and 558 transitions. [2019-12-27 04:39:24,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:24,708 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:24,710 INFO L225 Difference]: With dead ends: 243 [2019-12-27 04:39:24,710 INFO L226 Difference]: Without dead ends: 241 [2019-12-27 04:39:24,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:39:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-27 04:39:24,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 158. [2019-12-27 04:39:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 04:39:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 394 transitions. [2019-12-27 04:39:24,715 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 394 transitions. Word has length 13 [2019-12-27 04:39:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:24,715 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 394 transitions. [2019-12-27 04:39:24,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 394 transitions. [2019-12-27 04:39:24,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:24,716 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:24,716 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:24,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:24,920 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:24,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 45 times [2019-12-27 04:39:24,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:24,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727919712] [2019-12-27 04:39:24,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:24,999 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 04:39:24,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727919712] [2019-12-27 04:39:24,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870510228] [2019-12-27 04:39:24,999 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 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 04:39:25,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:25,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:25,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:25,044 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:26,099 WARN L192 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:39:26,100 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 04:39:26,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:26,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:26,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950051394] [2019-12-27 04:39:26,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:26,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:26,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:26,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:26,101 INFO L87 Difference]: Start difference. First operand 158 states and 394 transitions. Second operand 16 states. [2019-12-27 04:39:26,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:26,632 INFO L93 Difference]: Finished difference Result 239 states and 548 transitions. [2019-12-27 04:39:26,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:26,633 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:26,634 INFO L225 Difference]: With dead ends: 239 [2019-12-27 04:39:26,634 INFO L226 Difference]: Without dead ends: 237 [2019-12-27 04:39:26,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:39:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-27 04:39:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 159. [2019-12-27 04:39:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 04:39:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 398 transitions. [2019-12-27 04:39:26,637 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 398 transitions. Word has length 13 [2019-12-27 04:39:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:26,638 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 398 transitions. [2019-12-27 04:39:26,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 398 transitions. [2019-12-27 04:39:26,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:26,638 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:26,638 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:26,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:26,839 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:26,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 46 times [2019-12-27 04:39:26,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:26,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990514417] [2019-12-27 04:39:26,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:26,936 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 04:39:26,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990514417] [2019-12-27 04:39:26,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381910931] [2019-12-27 04:39:26,937 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 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 04:39:27,000 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:27,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:27,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:27,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:27,165 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 04:39:27,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:27,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:27,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958366061] [2019-12-27 04:39:27,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:27,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:27,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:27,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:27,166 INFO L87 Difference]: Start difference. First operand 159 states and 398 transitions. Second operand 16 states. [2019-12-27 04:39:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:27,558 INFO L93 Difference]: Finished difference Result 238 states and 546 transitions. [2019-12-27 04:39:27,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:39:27,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:27,560 INFO L225 Difference]: With dead ends: 238 [2019-12-27 04:39:27,560 INFO L226 Difference]: Without dead ends: 236 [2019-12-27 04:39:27,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-27 04:39:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 165. [2019-12-27 04:39:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-27 04:39:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 422 transitions. [2019-12-27 04:39:27,565 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 422 transitions. Word has length 13 [2019-12-27 04:39:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:27,565 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 422 transitions. [2019-12-27 04:39:27,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 422 transitions. [2019-12-27 04:39:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:27,566 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:27,566 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:27,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:27,770 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:27,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 47 times [2019-12-27 04:39:27,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:27,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963093715] [2019-12-27 04:39:27,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:27,853 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 04:39:27,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963093715] [2019-12-27 04:39:27,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607812166] [2019-12-27 04:39:27,854 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 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 04:39:27,896 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:27,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:27,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:27,898 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:27,993 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 04:39:27,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:27,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:27,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959879617] [2019-12-27 04:39:27,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:27,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:27,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:27,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:27,995 INFO L87 Difference]: Start difference. First operand 165 states and 422 transitions. Second operand 16 states. [2019-12-27 04:39:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:28,382 INFO L93 Difference]: Finished difference Result 245 states and 574 transitions. [2019-12-27 04:39:28,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:28,382 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:28,384 INFO L225 Difference]: With dead ends: 245 [2019-12-27 04:39:28,384 INFO L226 Difference]: Without dead ends: 243 [2019-12-27 04:39:28,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:39:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-27 04:39:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2019-12-27 04:39:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-12-27 04:39:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 418 transitions. [2019-12-27 04:39:28,389 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 418 transitions. Word has length 13 [2019-12-27 04:39:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:28,389 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 418 transitions. [2019-12-27 04:39:28,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 418 transitions. [2019-12-27 04:39:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:28,390 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:28,390 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:28,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:28,590 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:28,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:28,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 48 times [2019-12-27 04:39:28,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:28,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286943939] [2019-12-27 04:39:28,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:28,667 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 04:39:28,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286943939] [2019-12-27 04:39:28,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701829061] [2019-12-27 04:39:28,668 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 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 04:39:28,713 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:28,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:28,715 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:28,715 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:28,834 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 04:39:28,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:28,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:28,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572187320] [2019-12-27 04:39:28,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:28,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:28,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:28,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:28,836 INFO L87 Difference]: Start difference. First operand 164 states and 418 transitions. Second operand 16 states. [2019-12-27 04:39:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:29,133 INFO L93 Difference]: Finished difference Result 249 states and 575 transitions. [2019-12-27 04:39:29,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:29,133 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:29,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:29,135 INFO L225 Difference]: With dead ends: 249 [2019-12-27 04:39:29,136 INFO L226 Difference]: Without dead ends: 247 [2019-12-27 04:39:29,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-12-27 04:39:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 163. [2019-12-27 04:39:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-12-27 04:39:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 414 transitions. [2019-12-27 04:39:29,140 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 414 transitions. Word has length 13 [2019-12-27 04:39:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:29,140 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 414 transitions. [2019-12-27 04:39:29,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 414 transitions. [2019-12-27 04:39:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:29,141 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:29,141 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:29,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:29,342 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:29,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 49 times [2019-12-27 04:39:29,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:29,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624672618] [2019-12-27 04:39:29,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:29,426 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 04:39:29,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624672618] [2019-12-27 04:39:29,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112963961] [2019-12-27 04:39:29,427 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 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 04:39:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:29,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:29,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:29,578 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 04:39:29,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:29,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:29,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556658589] [2019-12-27 04:39:29,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:29,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:29,580 INFO L87 Difference]: Start difference. First operand 163 states and 414 transitions. Second operand 16 states. [2019-12-27 04:39:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:29,968 INFO L93 Difference]: Finished difference Result 243 states and 561 transitions. [2019-12-27 04:39:29,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:29,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:29,971 INFO L225 Difference]: With dead ends: 243 [2019-12-27 04:39:29,971 INFO L226 Difference]: Without dead ends: 241 [2019-12-27 04:39:29,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:39:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-27 04:39:29,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 163. [2019-12-27 04:39:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-12-27 04:39:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2019-12-27 04:39:29,975 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 13 [2019-12-27 04:39:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:29,975 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2019-12-27 04:39:29,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2019-12-27 04:39:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:29,976 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:29,976 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:30,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:30,179 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:30,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 50 times [2019-12-27 04:39:30,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:30,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573157005] [2019-12-27 04:39:30,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:30,258 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 04:39:30,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573157005] [2019-12-27 04:39:30,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020484111] [2019-12-27 04:39:30,258 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 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 04:39:30,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:30,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:30,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:30,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:30,416 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 04:39:30,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:30,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:30,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520793403] [2019-12-27 04:39:30,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:30,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:30,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:30,419 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 16 states. [2019-12-27 04:39:30,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:30,878 INFO L93 Difference]: Finished difference Result 238 states and 549 transitions. [2019-12-27 04:39:30,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:30,879 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:30,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:30,881 INFO L225 Difference]: With dead ends: 238 [2019-12-27 04:39:30,881 INFO L226 Difference]: Without dead ends: 236 [2019-12-27 04:39:30,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:39:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-27 04:39:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 161. [2019-12-27 04:39:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-27 04:39:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2019-12-27 04:39:30,888 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 13 [2019-12-27 04:39:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:30,888 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2019-12-27 04:39:30,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2019-12-27 04:39:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:30,889 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:30,889 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:31,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:31,093 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:31,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:31,094 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 51 times [2019-12-27 04:39:31,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:31,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553820831] [2019-12-27 04:39:31,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:31,181 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 04:39:31,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553820831] [2019-12-27 04:39:31,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618264873] [2019-12-27 04:39:31,182 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 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 04:39:31,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:31,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:31,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:39:31,259 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:31,399 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 04:39:31,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:31,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:31,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88185083] [2019-12-27 04:39:31,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:31,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:31,401 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 16 states. [2019-12-27 04:39:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:31,545 INFO L93 Difference]: Finished difference Result 194 states and 452 transitions. [2019-12-27 04:39:31,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:39:31,546 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:31,547 INFO L225 Difference]: With dead ends: 194 [2019-12-27 04:39:31,547 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 04:39:31,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:39:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 04:39:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 161. [2019-12-27 04:39:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-27 04:39:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2019-12-27 04:39:31,550 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 13 [2019-12-27 04:39:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:31,550 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2019-12-27 04:39:31,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2019-12-27 04:39:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:31,551 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:31,551 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:31,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:31,755 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:31,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:31,755 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 52 times [2019-12-27 04:39:31,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:31,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505998360] [2019-12-27 04:39:31,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:31,838 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 04:39:31,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505998360] [2019-12-27 04:39:31,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157160223] [2019-12-27 04:39:31,839 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 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 04:39:31,884 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:31,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:31,884 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:31,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:33,197 WARN L192 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-27 04:39:33,198 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 04:39:33,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:33,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:33,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188869750] [2019-12-27 04:39:33,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:33,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:33,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=179, Unknown=2, NotChecked=0, Total=240 [2019-12-27 04:39:33,200 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 16 states. [2019-12-27 04:39:34,149 WARN L192 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-12-27 04:39:34,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:34,216 INFO L93 Difference]: Finished difference Result 204 states and 468 transitions. [2019-12-27 04:39:34,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:39:34,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:34,219 INFO L225 Difference]: With dead ends: 204 [2019-12-27 04:39:34,219 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 04:39:34,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=217, Invalid=482, Unknown=3, NotChecked=0, Total=702 [2019-12-27 04:39:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 04:39:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 162. [2019-12-27 04:39:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:39:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2019-12-27 04:39:34,223 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 13 [2019-12-27 04:39:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:34,224 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2019-12-27 04:39:34,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2019-12-27 04:39:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:34,224 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:34,224 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:34,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:34,428 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:34,428 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 53 times [2019-12-27 04:39:34,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:34,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319019266] [2019-12-27 04:39:34,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:34,507 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 04:39:34,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319019266] [2019-12-27 04:39:34,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957895434] [2019-12-27 04:39:34,508 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 04:39:34,560 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:34,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:34,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:34,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:34,666 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 04:39:34,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:34,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:34,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174718887] [2019-12-27 04:39:34,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:34,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:34,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:34,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:34,668 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 16 states. [2019-12-27 04:39:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:34,988 INFO L93 Difference]: Finished difference Result 200 states and 458 transitions. [2019-12-27 04:39:34,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:39:34,989 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:34,990 INFO L225 Difference]: With dead ends: 200 [2019-12-27 04:39:34,990 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 04:39:34,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:39:34,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 04:39:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 161. [2019-12-27 04:39:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-27 04:39:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2019-12-27 04:39:34,994 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 13 [2019-12-27 04:39:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:34,994 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2019-12-27 04:39:34,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2019-12-27 04:39:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:34,995 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:34,995 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:35,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:35,196 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash -573414187, now seen corresponding path program 54 times [2019-12-27 04:39:35,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:35,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458664449] [2019-12-27 04:39:35,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:35,263 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 04:39:35,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458664449] [2019-12-27 04:39:35,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941648350] [2019-12-27 04:39:35,265 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 04:39:35,308 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:39:35,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:35,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:35,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:35,445 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 04:39:35,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:35,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:35,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967485098] [2019-12-27 04:39:35,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:35,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:35,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:35,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:35,447 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 16 states. [2019-12-27 04:39:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:35,838 INFO L93 Difference]: Finished difference Result 208 states and 473 transitions. [2019-12-27 04:39:35,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:35,838 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:35,840 INFO L225 Difference]: With dead ends: 208 [2019-12-27 04:39:35,840 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 04:39:35,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:39:35,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 04:39:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 157. [2019-12-27 04:39:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 04:39:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 387 transitions. [2019-12-27 04:39:35,845 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 387 transitions. Word has length 13 [2019-12-27 04:39:35,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:35,845 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 387 transitions. [2019-12-27 04:39:35,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 387 transitions. [2019-12-27 04:39:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:35,846 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:35,846 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:36,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:36,049 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:36,050 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 55 times [2019-12-27 04:39:36,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:36,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266208640] [2019-12-27 04:39:36,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:36,146 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 04:39:36,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266208640] [2019-12-27 04:39:36,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748203561] [2019-12-27 04:39:36,147 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 04:39:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:36,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:36,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:36,299 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 04:39:36,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:36,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:36,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621900015] [2019-12-27 04:39:36,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:36,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:36,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:36,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:36,301 INFO L87 Difference]: Start difference. First operand 157 states and 387 transitions. Second operand 16 states. [2019-12-27 04:39:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:36,782 INFO L93 Difference]: Finished difference Result 231 states and 525 transitions. [2019-12-27 04:39:36,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:36,783 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:36,784 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:39:36,784 INFO L226 Difference]: Without dead ends: 230 [2019-12-27 04:39:36,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:39:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-27 04:39:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 158. [2019-12-27 04:39:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 04:39:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 391 transitions. [2019-12-27 04:39:36,788 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 391 transitions. Word has length 13 [2019-12-27 04:39:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:36,789 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 391 transitions. [2019-12-27 04:39:36,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 391 transitions. [2019-12-27 04:39:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:36,789 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:36,790 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:36,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:36,990 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 56 times [2019-12-27 04:39:36,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:36,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942133093] [2019-12-27 04:39:36,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:37,127 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 04:39:37,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942133093] [2019-12-27 04:39:37,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844359014] [2019-12-27 04:39:37,128 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 04:39:37,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:37,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:37,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:37,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:37,381 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 04:39:37,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:37,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:37,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690298092] [2019-12-27 04:39:37,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:37,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:37,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:37,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:37,383 INFO L87 Difference]: Start difference. First operand 158 states and 391 transitions. Second operand 16 states. [2019-12-27 04:39:37,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:37,831 INFO L93 Difference]: Finished difference Result 237 states and 541 transitions. [2019-12-27 04:39:37,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:37,832 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:37,834 INFO L225 Difference]: With dead ends: 237 [2019-12-27 04:39:37,835 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 04:39:37,835 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 04:39:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 156. [2019-12-27 04:39:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 04:39:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2019-12-27 04:39:37,842 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 13 [2019-12-27 04:39:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:37,842 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2019-12-27 04:39:37,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2019-12-27 04:39:37,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:37,843 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:37,844 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:38,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:38,049 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:38,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:38,049 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 57 times [2019-12-27 04:39:38,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:38,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571380357] [2019-12-27 04:39:38,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:38,182 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 04:39:38,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571380357] [2019-12-27 04:39:38,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759932249] [2019-12-27 04:39:38,183 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 04:39:38,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:38,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:38,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:38,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:38,455 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 04:39:38,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:38,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:38,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714005113] [2019-12-27 04:39:38,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:38,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:38,457 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 16 states. [2019-12-27 04:39:38,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:38,981 INFO L93 Difference]: Finished difference Result 236 states and 537 transitions. [2019-12-27 04:39:38,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:38,982 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:38,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:38,983 INFO L225 Difference]: With dead ends: 236 [2019-12-27 04:39:38,983 INFO L226 Difference]: Without dead ends: 234 [2019-12-27 04:39:38,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:39:38,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-27 04:39:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 154. [2019-12-27 04:39:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 04:39:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 04:39:38,987 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 04:39:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:38,988 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 04:39:38,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 04:39:38,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:38,988 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:38,989 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:39,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:39,193 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:39,193 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 58 times [2019-12-27 04:39:39,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:39,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397583750] [2019-12-27 04:39:39,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:39,266 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 04:39:39,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397583750] [2019-12-27 04:39:39,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843074526] [2019-12-27 04:39:39,267 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 04:39:39,311 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:39,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:39,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:39,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:39,405 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 04:39:39,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:39,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:39,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297273092] [2019-12-27 04:39:39,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:39,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:39,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:39,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:39,407 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 16 states. [2019-12-27 04:39:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:39,692 INFO L93 Difference]: Finished difference Result 176 states and 401 transitions. [2019-12-27 04:39:39,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:39:39,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:39,693 INFO L225 Difference]: With dead ends: 176 [2019-12-27 04:39:39,693 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 04:39:39,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:39:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 04:39:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 154. [2019-12-27 04:39:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 04:39:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 363 transitions. [2019-12-27 04:39:39,697 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 363 transitions. Word has length 13 [2019-12-27 04:39:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:39,697 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 363 transitions. [2019-12-27 04:39:39,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 363 transitions. [2019-12-27 04:39:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:39,698 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:39,698 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:39,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:39,901 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:39,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:39,901 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-27 04:39:39,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:39,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220708112] [2019-12-27 04:39:39,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:39,989 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 04:39:39,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220708112] [2019-12-27 04:39:39,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248851102] [2019-12-27 04:39:39,990 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 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 04:39:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:40,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:39:40,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:40,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 04:39:40,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-27 04:39:40,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115585335] [2019-12-27 04:39:40,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 04:39:40,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 04:39:40,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:39:40,147 INFO L87 Difference]: Start difference. First operand 154 states and 363 transitions. Second operand 9 states. [2019-12-27 04:39:40,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:40,172 INFO L93 Difference]: Finished difference Result 203 states and 483 transitions. [2019-12-27 04:39:40,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:39:40,172 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 04:39:40,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:40,173 INFO L225 Difference]: With dead ends: 203 [2019-12-27 04:39:40,173 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 04:39:40,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:39:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 04:39:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2019-12-27 04:39:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-12-27 04:39:40,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 468 transitions. [2019-12-27 04:39:40,178 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 468 transitions. Word has length 13 [2019-12-27 04:39:40,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:40,179 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 468 transitions. [2019-12-27 04:39:40,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 04:39:40,179 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 468 transitions. [2019-12-27 04:39:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:40,179 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:40,179 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:40,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:40,383 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash 801671507, now seen corresponding path program 59 times [2019-12-27 04:39:40,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:40,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95591055] [2019-12-27 04:39:40,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:40,466 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 04:39:40,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95591055] [2019-12-27 04:39:40,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245581368] [2019-12-27 04:39:40,467 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:40,512 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:39:40,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:40,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:40,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:40,647 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 04:39:40,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:40,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:40,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862040810] [2019-12-27 04:39:40,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:40,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:40,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:40,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:40,649 INFO L87 Difference]: Start difference. First operand 195 states and 468 transitions. Second operand 18 states. [2019-12-27 04:39:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:41,012 INFO L93 Difference]: Finished difference Result 220 states and 516 transitions. [2019-12-27 04:39:41,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:39:41,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:41,014 INFO L225 Difference]: With dead ends: 220 [2019-12-27 04:39:41,014 INFO L226 Difference]: Without dead ends: 218 [2019-12-27 04:39:41,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:39:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-27 04:39:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 194. [2019-12-27 04:39:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-12-27 04:39:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2019-12-27 04:39:41,017 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 14 [2019-12-27 04:39:41,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:41,017 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2019-12-27 04:39:41,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2019-12-27 04:39:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:41,018 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:41,018 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:41,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:41,219 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:41,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:41,219 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 60 times [2019-12-27 04:39:41,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:41,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353028895] [2019-12-27 04:39:41,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:41,323 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 04:39:41,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353028895] [2019-12-27 04:39:41,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327586099] [2019-12-27 04:39:41,323 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:41,386 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:41,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:41,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:41,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:41,642 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 04:39:41,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:41,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:41,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133202460] [2019-12-27 04:39:41,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:41,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:41,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:41,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:41,645 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand 18 states. [2019-12-27 04:39:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:42,177 INFO L93 Difference]: Finished difference Result 242 states and 562 transitions. [2019-12-27 04:39:42,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:42,177 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:42,179 INFO L225 Difference]: With dead ends: 242 [2019-12-27 04:39:42,180 INFO L226 Difference]: Without dead ends: 241 [2019-12-27 04:39:42,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-27 04:39:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 196. [2019-12-27 04:39:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-27 04:39:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 476 transitions. [2019-12-27 04:39:42,185 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 476 transitions. Word has length 14 [2019-12-27 04:39:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:42,185 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 476 transitions. [2019-12-27 04:39:42,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 476 transitions. [2019-12-27 04:39:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:42,186 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:42,186 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:42,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:42,389 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:42,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash 801704987, now seen corresponding path program 61 times [2019-12-27 04:39:42,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:42,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35779681] [2019-12-27 04:39:42,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:42,477 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 04:39:42,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35779681] [2019-12-27 04:39:42,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429519781] [2019-12-27 04:39:42,478 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:42,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:42,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:43,080 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 04:39:43,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:43,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:43,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928059868] [2019-12-27 04:39:43,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:43,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:43,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:43,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:43,082 INFO L87 Difference]: Start difference. First operand 196 states and 476 transitions. Second operand 18 states. [2019-12-27 04:39:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:43,601 INFO L93 Difference]: Finished difference Result 245 states and 569 transitions. [2019-12-27 04:39:43,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:43,602 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:43,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:43,603 INFO L225 Difference]: With dead ends: 245 [2019-12-27 04:39:43,604 INFO L226 Difference]: Without dead ends: 242 [2019-12-27 04:39:43,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2019-12-27 04:39:43,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-27 04:39:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 196. [2019-12-27 04:39:43,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-27 04:39:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 475 transitions. [2019-12-27 04:39:43,608 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 475 transitions. Word has length 14 [2019-12-27 04:39:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:43,608 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 475 transitions. [2019-12-27 04:39:43,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 475 transitions. [2019-12-27 04:39:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:43,609 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:43,609 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:43,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:43,809 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:43,810 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 62 times [2019-12-27 04:39:43,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:43,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560923780] [2019-12-27 04:39:43,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:43,895 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 04:39:43,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560923780] [2019-12-27 04:39:43,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150929254] [2019-12-27 04:39:43,895 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:43,940 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:43,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:43,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:43,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:44,091 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 04:39:44,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:44,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:44,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614814898] [2019-12-27 04:39:44,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:44,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:44,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:44,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:44,093 INFO L87 Difference]: Start difference. First operand 196 states and 475 transitions. Second operand 18 states. [2019-12-27 04:39:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:44,517 INFO L93 Difference]: Finished difference Result 247 states and 575 transitions. [2019-12-27 04:39:44,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:44,517 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:44,519 INFO L225 Difference]: With dead ends: 247 [2019-12-27 04:39:44,519 INFO L226 Difference]: Without dead ends: 246 [2019-12-27 04:39:44,520 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-27 04:39:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 199. [2019-12-27 04:39:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 04:39:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 487 transitions. [2019-12-27 04:39:44,525 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 487 transitions. Word has length 14 [2019-12-27 04:39:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:44,525 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 487 transitions. [2019-12-27 04:39:44,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 487 transitions. [2019-12-27 04:39:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:44,526 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:44,526 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:44,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:44,729 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 63 times [2019-12-27 04:39:44,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:44,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728589107] [2019-12-27 04:39:44,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:44,837 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 04:39:44,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728589107] [2019-12-27 04:39:44,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686831211] [2019-12-27 04:39:44,838 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:44,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:44,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:44,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:44,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:45,426 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 04:39:45,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:45,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:45,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252778385] [2019-12-27 04:39:45,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:45,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:45,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:45,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:45,427 INFO L87 Difference]: Start difference. First operand 199 states and 487 transitions. Second operand 18 states. [2019-12-27 04:39:45,918 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:46,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:46,052 INFO L93 Difference]: Finished difference Result 276 states and 635 transitions. [2019-12-27 04:39:46,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:46,053 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:46,055 INFO L225 Difference]: With dead ends: 276 [2019-12-27 04:39:46,055 INFO L226 Difference]: Without dead ends: 275 [2019-12-27 04:39:46,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-27 04:39:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 199. [2019-12-27 04:39:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 04:39:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 487 transitions. [2019-12-27 04:39:46,058 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 487 transitions. Word has length 14 [2019-12-27 04:39:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:46,059 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 487 transitions. [2019-12-27 04:39:46,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 487 transitions. [2019-12-27 04:39:46,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:46,059 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:46,059 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:46,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:46,262 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:46,263 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 64 times [2019-12-27 04:39:46,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:46,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743299877] [2019-12-27 04:39:46,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:46,356 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 04:39:46,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743299877] [2019-12-27 04:39:46,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799105501] [2019-12-27 04:39:46,357 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:39:46,398 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:46,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:46,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:46,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:47,308 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 04:39:47,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:47,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:47,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243350015] [2019-12-27 04:39:47,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:47,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:47,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:47,309 INFO L87 Difference]: Start difference. First operand 199 states and 487 transitions. Second operand 18 states. [2019-12-27 04:39:47,933 WARN L192 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:39:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:48,352 INFO L93 Difference]: Finished difference Result 276 states and 635 transitions. [2019-12-27 04:39:48,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:48,352 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:48,354 INFO L225 Difference]: With dead ends: 276 [2019-12-27 04:39:48,354 INFO L226 Difference]: Without dead ends: 275 [2019-12-27 04:39:48,355 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-27 04:39:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 200. [2019-12-27 04:39:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-27 04:39:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 491 transitions. [2019-12-27 04:39:48,360 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 491 transitions. Word has length 14 [2019-12-27 04:39:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:48,360 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 491 transitions. [2019-12-27 04:39:48,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 491 transitions. [2019-12-27 04:39:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:48,361 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:48,361 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:48,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:48,564 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:48,564 INFO L82 PathProgramCache]: Analyzing trace with hash 802742867, now seen corresponding path program 65 times [2019-12-27 04:39:48,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:48,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497532781] [2019-12-27 04:39:48,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:48,647 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 04:39:48,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497532781] [2019-12-27 04:39:48,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77955822] [2019-12-27 04:39:48,647 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:48,688 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:39:48,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:48,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:48,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:49,275 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 04:39:49,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:49,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:49,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361182821] [2019-12-27 04:39:49,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:49,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:49,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:49,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:49,277 INFO L87 Difference]: Start difference. First operand 200 states and 491 transitions. Second operand 18 states. [2019-12-27 04:39:49,713 WARN L192 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2019-12-27 04:39:51,712 WARN L192 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-27 04:39:52,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:52,653 INFO L93 Difference]: Finished difference Result 250 states and 585 transitions. [2019-12-27 04:39:52,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:52,653 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:52,655 INFO L225 Difference]: With dead ends: 250 [2019-12-27 04:39:52,655 INFO L226 Difference]: Without dead ends: 246 [2019-12-27 04:39:52,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:52,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-27 04:39:52,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 199. [2019-12-27 04:39:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 04:39:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 486 transitions. [2019-12-27 04:39:52,660 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 486 transitions. Word has length 14 [2019-12-27 04:39:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:52,660 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 486 transitions. [2019-12-27 04:39:52,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 486 transitions. [2019-12-27 04:39:52,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:52,661 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:52,661 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:52,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:52,864 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:52,864 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 66 times [2019-12-27 04:39:52,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:52,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105940503] [2019-12-27 04:39:52,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:52,994 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 04:39:52,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105940503] [2019-12-27 04:39:52,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170577407] [2019-12-27 04:39:52,995 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:53,036 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:53,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:53,037 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:53,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:53,221 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 04:39:53,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:53,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:53,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144528338] [2019-12-27 04:39:53,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:53,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:53,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:53,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:53,222 INFO L87 Difference]: Start difference. First operand 199 states and 486 transitions. Second operand 18 states. [2019-12-27 04:39:53,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:53,718 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2019-12-27 04:39:53,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:39:53,719 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:53,721 INFO L225 Difference]: With dead ends: 254 [2019-12-27 04:39:53,721 INFO L226 Difference]: Without dead ends: 252 [2019-12-27 04:39:53,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:39:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-27 04:39:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 208. [2019-12-27 04:39:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 04:39:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 522 transitions. [2019-12-27 04:39:53,728 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 522 transitions. Word has length 14 [2019-12-27 04:39:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:53,728 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 522 transitions. [2019-12-27 04:39:53,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:53,728 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 522 transitions. [2019-12-27 04:39:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:53,729 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:53,729 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:53,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:53,932 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:53,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:53,933 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 67 times [2019-12-27 04:39:53,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:53,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685890156] [2019-12-27 04:39:53,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:54,057 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 04:39:54,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685890156] [2019-12-27 04:39:54,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847553260] [2019-12-27 04:39:54,057 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:54,101 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:54,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:55,885 WARN L192 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:39:55,886 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 04:39:55,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:55,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:55,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619819993] [2019-12-27 04:39:55,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:55,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:55,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:55,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=234, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:39:55,888 INFO L87 Difference]: Start difference. First operand 208 states and 522 transitions. Second operand 18 states. [2019-12-27 04:39:56,594 WARN L192 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2019-12-27 04:39:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:57,915 INFO L93 Difference]: Finished difference Result 305 states and 704 transitions. [2019-12-27 04:39:57,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:57,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:57,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:57,918 INFO L225 Difference]: With dead ends: 305 [2019-12-27 04:39:57,918 INFO L226 Difference]: Without dead ends: 303 [2019-12-27 04:39:57,919 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=349, Invalid=769, Unknown=4, NotChecked=0, Total=1122 [2019-12-27 04:39:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2019-12-27 04:39:57,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 208. [2019-12-27 04:39:57,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 04:39:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 522 transitions. [2019-12-27 04:39:57,927 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 522 transitions. Word has length 14 [2019-12-27 04:39:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:57,928 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 522 transitions. [2019-12-27 04:39:57,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 522 transitions. [2019-12-27 04:39:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:57,929 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:57,929 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:58,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:58,132 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 68 times [2019-12-27 04:39:58,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:58,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769933322] [2019-12-27 04:39:58,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:58,295 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 04:39:58,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769933322] [2019-12-27 04:39:58,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399679345] [2019-12-27 04:39:58,296 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:58,367 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:58,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:58,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:58,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:58,960 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_250 Int)) (and (<= c_~j~0 (+ v_~j~0_250 c_~i~0)) (<= c_~i~0 (+ (* 2 v_~j~0_250) 1)) (<= (div (+ (* v_~j~0_250 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-27 04:40:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-12-27 04:40:00,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:00,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:00,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798272799] [2019-12-27 04:40:00,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:00,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:00,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:00,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=205, Unknown=2, NotChecked=30, Total=306 [2019-12-27 04:40:00,542 INFO L87 Difference]: Start difference. First operand 208 states and 522 transitions. Second operand 18 states. [2019-12-27 04:40:04,754 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-12-27 04:40:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:08,870 INFO L93 Difference]: Finished difference Result 318 states and 718 transitions. [2019-12-27 04:40:08,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:40:08,871 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:08,873 INFO L225 Difference]: With dead ends: 318 [2019-12-27 04:40:08,873 INFO L226 Difference]: Without dead ends: 316 [2019-12-27 04:40:08,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=391, Invalid=866, Unknown=7, NotChecked=68, Total=1332 [2019-12-27 04:40:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2019-12-27 04:40:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 209. [2019-12-27 04:40:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-27 04:40:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 526 transitions. [2019-12-27 04:40:08,878 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 526 transitions. Word has length 14 [2019-12-27 04:40:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:08,878 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 526 transitions. [2019-12-27 04:40:08,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 526 transitions. [2019-12-27 04:40:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:08,879 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:08,879 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:09,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:09,081 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:09,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:09,082 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 69 times [2019-12-27 04:40:09,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:09,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076544506] [2019-12-27 04:40:09,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:09,175 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 04:40:09,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076544506] [2019-12-27 04:40:09,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137337982] [2019-12-27 04:40:09,175 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 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 04:40:09,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:40:09,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:09,223 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:09,223 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:13,134 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 04:40:13,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:13,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:13,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977897830] [2019-12-27 04:40:13,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:13,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:13,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:13,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=230, Unknown=2, NotChecked=0, Total=306 [2019-12-27 04:40:13,136 INFO L87 Difference]: Start difference. First operand 209 states and 526 transitions. Second operand 18 states. [2019-12-27 04:40:13,304 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2019-12-27 04:40:13,800 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-12-27 04:40:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:15,888 INFO L93 Difference]: Finished difference Result 304 states and 702 transitions. [2019-12-27 04:40:15,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:15,889 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:15,891 INFO L225 Difference]: With dead ends: 304 [2019-12-27 04:40:15,891 INFO L226 Difference]: Without dead ends: 298 [2019-12-27 04:40:15,892 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=378, Invalid=809, Unknown=3, NotChecked=0, Total=1190 [2019-12-27 04:40:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-12-27 04:40:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2019-12-27 04:40:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 04:40:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 527 transitions. [2019-12-27 04:40:15,896 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 527 transitions. Word has length 14 [2019-12-27 04:40:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:15,897 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 527 transitions. [2019-12-27 04:40:15,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 527 transitions. [2019-12-27 04:40:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:15,897 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:15,897 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:16,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:16,098 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:16,099 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 70 times [2019-12-27 04:40:16,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:16,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476419031] [2019-12-27 04:40:16,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:16,188 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 04:40:16,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476419031] [2019-12-27 04:40:16,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738250912] [2019-12-27 04:40:16,189 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 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 04:40:16,234 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:40:16,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:16,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:16,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:19,260 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 04:40:19,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:19,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:19,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470253308] [2019-12-27 04:40:19,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:19,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:19,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:19,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:40:19,262 INFO L87 Difference]: Start difference. First operand 210 states and 527 transitions. Second operand 18 states. [2019-12-27 04:40:19,963 WARN L192 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-27 04:40:21,207 WARN L192 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2019-12-27 04:40:23,153 WARN L192 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-27 04:40:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:23,569 INFO L93 Difference]: Finished difference Result 301 states and 699 transitions. [2019-12-27 04:40:23,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:40:23,570 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:23,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:23,572 INFO L225 Difference]: With dead ends: 301 [2019-12-27 04:40:23,572 INFO L226 Difference]: Without dead ends: 300 [2019-12-27 04:40:23,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=282, Invalid=707, Unknown=3, NotChecked=0, Total=992 [2019-12-27 04:40:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-12-27 04:40:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 211. [2019-12-27 04:40:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 04:40:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 531 transitions. [2019-12-27 04:40:23,577 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 531 transitions. Word has length 14 [2019-12-27 04:40:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:23,577 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 531 transitions. [2019-12-27 04:40:23,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 531 transitions. [2019-12-27 04:40:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:23,578 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:23,578 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:23,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:23,782 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:23,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:23,782 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 71 times [2019-12-27 04:40:23,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:23,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290502321] [2019-12-27 04:40:23,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:23,874 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 04:40:23,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290502321] [2019-12-27 04:40:23,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503537590] [2019-12-27 04:40:23,875 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 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 04:40:23,920 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:40:23,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:23,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:23,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:26,650 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_263 Int)) (and (<= c_~i~0 (+ (* 3 v_~j~0_263) 2)) (<= (div (+ (* v_~j~0_263 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ (* 2 v_~j~0_263) c_~i~0 1)))) is different from true [2019-12-27 04:40:26,651 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 04:40:26,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:26,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:26,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008629303] [2019-12-27 04:40:26,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:26,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:26,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:26,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=201, Unknown=3, NotChecked=30, Total=306 [2019-12-27 04:40:26,652 INFO L87 Difference]: Start difference. First operand 211 states and 531 transitions. Second operand 18 states. [2019-12-27 04:40:27,337 WARN L192 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-27 04:40:28,072 WARN L192 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-27 04:40:28,538 WARN L192 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-27 04:40:30,233 WARN L192 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-27 04:40:30,826 WARN L192 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2019-12-27 04:40:31,273 WARN L192 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-27 04:40:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:31,293 INFO L93 Difference]: Finished difference Result 294 states and 691 transitions. [2019-12-27 04:40:31,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:31,294 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:31,297 INFO L225 Difference]: With dead ends: 294 [2019-12-27 04:40:31,297 INFO L226 Difference]: Without dead ends: 293 [2019-12-27 04:40:31,297 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=289, Invalid=640, Unknown=5, NotChecked=58, Total=992 [2019-12-27 04:40:31,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-12-27 04:40:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 210. [2019-12-27 04:40:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 04:40:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 527 transitions. [2019-12-27 04:40:31,302 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 527 transitions. Word has length 14 [2019-12-27 04:40:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:31,303 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 527 transitions. [2019-12-27 04:40:31,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 527 transitions. [2019-12-27 04:40:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:31,303 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:31,304 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:31,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:31,507 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 72 times [2019-12-27 04:40:31,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:31,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300100924] [2019-12-27 04:40:31,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:31,600 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 04:40:31,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300100924] [2019-12-27 04:40:31,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545512030] [2019-12-27 04:40:31,601 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 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 04:40:31,644 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:40:31,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:31,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:31,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:43,085 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 04:40:43,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:43,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:43,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491198303] [2019-12-27 04:40:43,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:43,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=226, Unknown=5, NotChecked=0, Total=306 [2019-12-27 04:40:43,086 INFO L87 Difference]: Start difference. First operand 210 states and 527 transitions. Second operand 18 states. [2019-12-27 04:40:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:45,402 INFO L93 Difference]: Finished difference Result 269 states and 632 transitions. [2019-12-27 04:40:45,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:40:45,403 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:45,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:45,405 INFO L225 Difference]: With dead ends: 269 [2019-12-27 04:40:45,406 INFO L226 Difference]: Without dead ends: 268 [2019-12-27 04:40:45,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=200, Invalid=496, Unknown=6, NotChecked=0, Total=702 [2019-12-27 04:40:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-12-27 04:40:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 208. [2019-12-27 04:40:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 04:40:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 04:40:45,410 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 04:40:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:45,411 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 04:40:45,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 04:40:45,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:45,411 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:45,411 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:45,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:45,612 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:45,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:45,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 73 times [2019-12-27 04:40:45,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:45,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282823484] [2019-12-27 04:40:45,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:45,728 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 04:40:45,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282823484] [2019-12-27 04:40:45,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771764740] [2019-12-27 04:40:45,729 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:40:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:45,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:45,773 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:45,967 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 04:40:45,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:45,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:45,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207349819] [2019-12-27 04:40:45,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:45,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:45,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:45,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:45,968 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-27 04:40:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:46,661 INFO L93 Difference]: Finished difference Result 329 states and 757 transitions. [2019-12-27 04:40:46,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:40:46,662 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:46,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:46,664 INFO L225 Difference]: With dead ends: 329 [2019-12-27 04:40:46,664 INFO L226 Difference]: Without dead ends: 327 [2019-12-27 04:40:46,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:40:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-12-27 04:40:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 214. [2019-12-27 04:40:46,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 04:40:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-27 04:40:46,670 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-27 04:40:46,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:46,671 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-27 04:40:46,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:46,671 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-27 04:40:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:46,671 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:46,671 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:46,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:46,875 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:46,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 74 times [2019-12-27 04:40:46,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:46,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864894914] [2019-12-27 04:40:46,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:46,967 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 04:40:46,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864894914] [2019-12-27 04:40:46,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743600469] [2019-12-27 04:40:46,968 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 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 04:40:47,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:40:47,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:47,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:47,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:47,197 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 04:40:47,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:47,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:47,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322099071] [2019-12-27 04:40:47,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:47,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:47,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:47,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:47,198 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 18 states. [2019-12-27 04:40:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:47,916 INFO L93 Difference]: Finished difference Result 318 states and 736 transitions. [2019-12-27 04:40:47,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:40:47,917 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:47,918 INFO L225 Difference]: With dead ends: 318 [2019-12-27 04:40:47,919 INFO L226 Difference]: Without dead ends: 316 [2019-12-27 04:40:47,919 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:40:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2019-12-27 04:40:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 212. [2019-12-27 04:40:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 04:40:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-27 04:40:47,924 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-27 04:40:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:47,924 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-27 04:40:47,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-27 04:40:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:47,925 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:47,925 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:48,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:48,128 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:48,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 75 times [2019-12-27 04:40:48,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:48,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527151880] [2019-12-27 04:40:48,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:48,219 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 04:40:48,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527151880] [2019-12-27 04:40:48,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719402224] [2019-12-27 04:40:48,220 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 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 04:40:48,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:40:48,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:48,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:48,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:48,474 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 04:40:48,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:48,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:48,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446315021] [2019-12-27 04:40:48,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:48,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:48,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:48,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:48,476 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 18 states. [2019-12-27 04:40:49,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:49,604 INFO L93 Difference]: Finished difference Result 328 states and 759 transitions. [2019-12-27 04:40:49,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:49,605 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:49,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:49,608 INFO L225 Difference]: With dead ends: 328 [2019-12-27 04:40:49,608 INFO L226 Difference]: Without dead ends: 326 [2019-12-27 04:40:49,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=289, Invalid=702, Unknown=1, NotChecked=0, Total=992 [2019-12-27 04:40:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-12-27 04:40:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 216. [2019-12-27 04:40:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 04:40:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 553 transitions. [2019-12-27 04:40:49,612 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 553 transitions. Word has length 14 [2019-12-27 04:40:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:49,613 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 553 transitions. [2019-12-27 04:40:49,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 553 transitions. [2019-12-27 04:40:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:49,613 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:49,613 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:49,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:49,814 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:49,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:49,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 76 times [2019-12-27 04:40:49,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:49,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051160670] [2019-12-27 04:40:49,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:49,964 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 04:40:49,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051160670] [2019-12-27 04:40:49,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630558470] [2019-12-27 04:40:49,965 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:40:50,027 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:40:50,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:50,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:50,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:50,341 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 04:40:50,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:50,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:50,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072609958] [2019-12-27 04:40:50,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:50,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:50,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:50,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:50,343 INFO L87 Difference]: Start difference. First operand 216 states and 553 transitions. Second operand 18 states. [2019-12-27 04:40:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:51,558 INFO L93 Difference]: Finished difference Result 349 states and 811 transitions. [2019-12-27 04:40:51,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:40:51,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:51,562 INFO L225 Difference]: With dead ends: 349 [2019-12-27 04:40:51,562 INFO L226 Difference]: Without dead ends: 347 [2019-12-27 04:40:51,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=336, Invalid=786, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:40:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2019-12-27 04:40:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 217. [2019-12-27 04:40:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 04:40:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 557 transitions. [2019-12-27 04:40:51,566 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 557 transitions. Word has length 14 [2019-12-27 04:40:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:51,567 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 557 transitions. [2019-12-27 04:40:51,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 557 transitions. [2019-12-27 04:40:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:51,567 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:51,567 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:51,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:51,769 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:51,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:51,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 77 times [2019-12-27 04:40:51,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:51,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573711990] [2019-12-27 04:40:51,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:51,859 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 04:40:51,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573711990] [2019-12-27 04:40:51,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157903017] [2019-12-27 04:40:51,860 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 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 04:40:51,904 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:40:51,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:51,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:51,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:00,237 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 04:41:00,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:00,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:00,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010251339] [2019-12-27 04:41:00,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:00,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:00,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:41:00,238 INFO L87 Difference]: Start difference. First operand 217 states and 557 transitions. Second operand 18 states. [2019-12-27 04:41:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:05,784 INFO L93 Difference]: Finished difference Result 356 states and 822 transitions. [2019-12-27 04:41:05,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:41:05,785 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:05,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:05,787 INFO L225 Difference]: With dead ends: 356 [2019-12-27 04:41:05,788 INFO L226 Difference]: Without dead ends: 354 [2019-12-27 04:41:05,788 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=334, Invalid=787, Unknown=1, NotChecked=0, Total=1122 [2019-12-27 04:41:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-12-27 04:41:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 221. [2019-12-27 04:41:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-27 04:41:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 573 transitions. [2019-12-27 04:41:05,792 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 573 transitions. Word has length 14 [2019-12-27 04:41:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:05,792 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 573 transitions. [2019-12-27 04:41:05,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 573 transitions. [2019-12-27 04:41:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:05,793 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:05,793 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:05,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:05,994 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:05,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 78 times [2019-12-27 04:41:05,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:05,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088737095] [2019-12-27 04:41:05,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:06,084 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 04:41:06,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088737095] [2019-12-27 04:41:06,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612908618] [2019-12-27 04:41:06,085 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 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 04:41:06,124 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:41:06,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:06,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:06,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:06,368 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 04:41:06,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:06,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:06,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138479834] [2019-12-27 04:41:06,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:06,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:06,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:06,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:06,369 INFO L87 Difference]: Start difference. First operand 221 states and 573 transitions. Second operand 18 states. [2019-12-27 04:41:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:07,479 INFO L93 Difference]: Finished difference Result 303 states and 727 transitions. [2019-12-27 04:41:07,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:41:07,480 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:07,482 INFO L225 Difference]: With dead ends: 303 [2019-12-27 04:41:07,482 INFO L226 Difference]: Without dead ends: 302 [2019-12-27 04:41:07,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 04:41:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-12-27 04:41:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 222. [2019-12-27 04:41:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 04:41:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 577 transitions. [2019-12-27 04:41:07,488 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 577 transitions. Word has length 14 [2019-12-27 04:41:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:07,488 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 577 transitions. [2019-12-27 04:41:07,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:07,488 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 577 transitions. [2019-12-27 04:41:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:07,489 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:07,489 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:07,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:07,690 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:07,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:07,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 79 times [2019-12-27 04:41:07,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:07,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491308547] [2019-12-27 04:41:07,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:07,782 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 04:41:07,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491308547] [2019-12-27 04:41:07,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413514177] [2019-12-27 04:41:07,783 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 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 04:41:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:07,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:07,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:12,703 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 04:41:12,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:12,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:12,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830822307] [2019-12-27 04:41:12,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:12,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:12,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:12,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:12,704 INFO L87 Difference]: Start difference. First operand 222 states and 577 transitions. Second operand 18 states. [2019-12-27 04:41:20,948 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-27 04:41:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:21,123 INFO L93 Difference]: Finished difference Result 330 states and 792 transitions. [2019-12-27 04:41:21,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:41:21,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:21,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:21,126 INFO L225 Difference]: With dead ends: 330 [2019-12-27 04:41:21,126 INFO L226 Difference]: Without dead ends: 329 [2019-12-27 04:41:21,127 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=271, Invalid=658, Unknown=1, NotChecked=0, Total=930 [2019-12-27 04:41:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2019-12-27 04:41:21,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 222. [2019-12-27 04:41:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 04:41:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 577 transitions. [2019-12-27 04:41:21,133 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 577 transitions. Word has length 14 [2019-12-27 04:41:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:21,133 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 577 transitions. [2019-12-27 04:41:21,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:21,133 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 577 transitions. [2019-12-27 04:41:21,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:21,134 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:21,134 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:21,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:21,335 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 80 times [2019-12-27 04:41:21,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:21,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382761242] [2019-12-27 04:41:21,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:21,513 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 04:41:21,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382761242] [2019-12-27 04:41:21,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863102391] [2019-12-27 04:41:21,514 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 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 04:41:21,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:41:21,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:21,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:21,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:21,801 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 04:41:21,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:21,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:21,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063203085] [2019-12-27 04:41:21,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:21,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:21,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:21,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:21,803 INFO L87 Difference]: Start difference. First operand 222 states and 577 transitions. Second operand 18 states. [2019-12-27 04:41:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:22,920 INFO L93 Difference]: Finished difference Result 329 states and 793 transitions. [2019-12-27 04:41:22,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:41:22,921 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:22,923 INFO L225 Difference]: With dead ends: 329 [2019-12-27 04:41:22,923 INFO L226 Difference]: Without dead ends: 328 [2019-12-27 04:41:22,924 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:41:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-27 04:41:22,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 222. [2019-12-27 04:41:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 04:41:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 577 transitions. [2019-12-27 04:41:22,929 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 577 transitions. Word has length 14 [2019-12-27 04:41:22,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:22,929 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 577 transitions. [2019-12-27 04:41:22,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:22,929 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 577 transitions. [2019-12-27 04:41:22,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:22,930 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:22,930 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:23,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:23,131 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:23,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:23,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 81 times [2019-12-27 04:41:23,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:23,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057418216] [2019-12-27 04:41:23,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:23,227 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 04:41:23,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057418216] [2019-12-27 04:41:23,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631100767] [2019-12-27 04:41:23,227 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 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 04:41:23,273 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:41:23,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:23,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:23,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:23,528 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 04:41:23,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:23,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:23,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065616668] [2019-12-27 04:41:23,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:23,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:23,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:23,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:23,530 INFO L87 Difference]: Start difference. First operand 222 states and 577 transitions. Second operand 18 states. [2019-12-27 04:41:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:24,367 INFO L93 Difference]: Finished difference Result 327 states and 770 transitions. [2019-12-27 04:41:24,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:41:24,368 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:24,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:24,369 INFO L225 Difference]: With dead ends: 327 [2019-12-27 04:41:24,370 INFO L226 Difference]: Without dead ends: 320 [2019-12-27 04:41:24,370 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 04:41:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-12-27 04:41:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 220. [2019-12-27 04:41:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-27 04:41:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 566 transitions. [2019-12-27 04:41:24,375 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 566 transitions. Word has length 14 [2019-12-27 04:41:24,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:24,376 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 566 transitions. [2019-12-27 04:41:24,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:24,376 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 566 transitions. [2019-12-27 04:41:24,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:24,376 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:24,376 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:24,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:24,579 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:24,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 82 times [2019-12-27 04:41:24,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:24,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777696490] [2019-12-27 04:41:24,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:24,680 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 04:41:24,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777696490] [2019-12-27 04:41:24,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928554206] [2019-12-27 04:41:24,681 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 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 04:41:24,722 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:41:24,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:24,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:24,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:29,094 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 04:41:29,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:29,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:29,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883207986] [2019-12-27 04:41:29,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:29,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:29,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:29,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:29,096 INFO L87 Difference]: Start difference. First operand 220 states and 566 transitions. Second operand 18 states. [2019-12-27 04:41:29,384 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2019-12-27 04:41:30,268 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-27 04:41:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:30,734 INFO L93 Difference]: Finished difference Result 314 states and 743 transitions. [2019-12-27 04:41:30,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:41:30,735 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:30,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:30,737 INFO L225 Difference]: With dead ends: 314 [2019-12-27 04:41:30,738 INFO L226 Difference]: Without dead ends: 313 [2019-12-27 04:41:30,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:41:30,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-27 04:41:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 217. [2019-12-27 04:41:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 04:41:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 556 transitions. [2019-12-27 04:41:30,745 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 556 transitions. Word has length 14 [2019-12-27 04:41:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:30,745 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 556 transitions. [2019-12-27 04:41:30,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 556 transitions. [2019-12-27 04:41:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:30,746 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:30,746 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:30,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:30,947 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:30,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018186, now seen corresponding path program 83 times [2019-12-27 04:41:30,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:30,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412059358] [2019-12-27 04:41:30,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:31,034 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 04:41:31,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412059358] [2019-12-27 04:41:31,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314062805] [2019-12-27 04:41:31,035 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 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 04:41:31,081 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:41:31,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:31,082 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:31,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:31,219 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 04:41:31,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:31,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:31,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175380980] [2019-12-27 04:41:31,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:31,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:31,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:31,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:31,220 INFO L87 Difference]: Start difference. First operand 217 states and 556 transitions. Second operand 18 states. [2019-12-27 04:41:31,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:31,595 INFO L93 Difference]: Finished difference Result 234 states and 578 transitions. [2019-12-27 04:41:31,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:41:31,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:31,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:31,597 INFO L225 Difference]: With dead ends: 234 [2019-12-27 04:41:31,597 INFO L226 Difference]: Without dead ends: 225 [2019-12-27 04:41:31,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2019-12-27 04:41:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-27 04:41:31,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 219. [2019-12-27 04:41:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-12-27 04:41:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 555 transitions. [2019-12-27 04:41:31,603 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 555 transitions. Word has length 14 [2019-12-27 04:41:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:31,603 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 555 transitions. [2019-12-27 04:41:31,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:31,603 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 555 transitions. [2019-12-27 04:41:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:31,604 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:31,604 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:31,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:31,805 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:31,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 84 times [2019-12-27 04:41:31,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:31,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216089674] [2019-12-27 04:41:31,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:31,895 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 04:41:31,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216089674] [2019-12-27 04:41:31,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890473606] [2019-12-27 04:41:31,896 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 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 04:41:31,942 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:41:31,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:31,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:31,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:32,104 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 04:41:32,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:32,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:32,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991499489] [2019-12-27 04:41:32,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:32,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:32,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:32,106 INFO L87 Difference]: Start difference. First operand 219 states and 555 transitions. Second operand 18 states. [2019-12-27 04:41:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:32,750 INFO L93 Difference]: Finished difference Result 273 states and 656 transitions. [2019-12-27 04:41:32,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:41:32,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:32,753 INFO L225 Difference]: With dead ends: 273 [2019-12-27 04:41:32,753 INFO L226 Difference]: Without dead ends: 270 [2019-12-27 04:41:32,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:41:32,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-27 04:41:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 215. [2019-12-27 04:41:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 04:41:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 551 transitions. [2019-12-27 04:41:32,759 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 551 transitions. Word has length 14 [2019-12-27 04:41:32,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:32,759 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 551 transitions. [2019-12-27 04:41:32,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 551 transitions. [2019-12-27 04:41:32,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:32,760 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:32,760 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:32,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:32,963 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:32,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:32,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1460172101, now seen corresponding path program 85 times [2019-12-27 04:41:32,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:32,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523409106] [2019-12-27 04:41:32,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:33,056 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 04:41:33,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523409106] [2019-12-27 04:41:33,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444033259] [2019-12-27 04:41:33,057 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 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 04:41:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:33,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:33,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:33,249 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 04:41:33,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:33,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:33,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144162644] [2019-12-27 04:41:33,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:33,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:33,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:33,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:33,251 INFO L87 Difference]: Start difference. First operand 215 states and 551 transitions. Second operand 18 states. [2019-12-27 04:41:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:33,844 INFO L93 Difference]: Finished difference Result 299 states and 704 transitions. [2019-12-27 04:41:33,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:41:33,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:33,846 INFO L225 Difference]: With dead ends: 299 [2019-12-27 04:41:33,847 INFO L226 Difference]: Without dead ends: 297 [2019-12-27 04:41:33,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 04:41:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-12-27 04:41:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 213. [2019-12-27 04:41:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 04:41:33,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 555 transitions. [2019-12-27 04:41:33,852 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 555 transitions. Word has length 14 [2019-12-27 04:41:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:33,852 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 555 transitions. [2019-12-27 04:41:33,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:33,853 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 555 transitions. [2019-12-27 04:41:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:33,853 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:33,853 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:34,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:34,057 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:34,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 86 times [2019-12-27 04:41:34,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:34,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982888916] [2019-12-27 04:41:34,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:34,150 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 04:41:34,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982888916] [2019-12-27 04:41:34,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482816602] [2019-12-27 04:41:34,151 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 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 04:41:34,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:41:34,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:34,194 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:34,195 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:35,078 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_254 Int)) (and (<= (div (+ (* v_~i~0_254 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ v_~i~0_254 (* 2 c_~j~0))) (<= c_~j~0 (+ v_~i~0_254 2)))) is different from true [2019-12-27 04:41:36,117 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 04:41:36,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:36,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:36,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478383246] [2019-12-27 04:41:36,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:36,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:36,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:36,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=205, Unknown=1, NotChecked=30, Total=306 [2019-12-27 04:41:36,119 INFO L87 Difference]: Start difference. First operand 213 states and 555 transitions. Second operand 18 states. [2019-12-27 04:41:36,395 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2019-12-27 04:41:37,231 WARN L192 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 04:41:37,851 WARN L192 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2019-12-27 04:41:38,936 WARN L192 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-27 04:41:39,967 WARN L192 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-27 04:41:41,134 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2019-12-27 04:41:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:41,196 INFO L93 Difference]: Finished difference Result 327 states and 757 transitions. [2019-12-27 04:41:41,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 04:41:41,197 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:41,199 INFO L225 Difference]: With dead ends: 327 [2019-12-27 04:41:41,199 INFO L226 Difference]: Without dead ends: 321 [2019-12-27 04:41:41,200 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=437, Invalid=1124, Unknown=3, NotChecked=76, Total=1640 [2019-12-27 04:41:41,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-12-27 04:41:41,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 217. [2019-12-27 04:41:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 04:41:41,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 568 transitions. [2019-12-27 04:41:41,205 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 568 transitions. Word has length 14 [2019-12-27 04:41:41,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:41,205 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 568 transitions. [2019-12-27 04:41:41,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:41,206 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 568 transitions. [2019-12-27 04:41:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:41,206 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:41,206 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:41,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:41,410 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:41,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:41,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 87 times [2019-12-27 04:41:41,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:41,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970914358] [2019-12-27 04:41:41,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:41,513 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 04:41:41,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970914358] [2019-12-27 04:41:41,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117443059] [2019-12-27 04:41:41,513 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 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 04:41:41,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:41:41,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:41,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:41,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:42,108 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_259 Int)) (and (<= c_~j~0 (+ v_~i~0_259 2)) (<= (div (+ (* v_~i~0_259 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ v_~i~0_259 c_~j~0)))) is different from true [2019-12-27 04:41:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-27 04:41:49,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:49,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:49,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231864637] [2019-12-27 04:41:49,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:49,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:49,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:49,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=205, Unknown=1, NotChecked=30, Total=306 [2019-12-27 04:41:49,037 INFO L87 Difference]: Start difference. First operand 217 states and 568 transitions. Second operand 18 states. [2019-12-27 04:41:49,426 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2019-12-27 04:41:49,990 WARN L192 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2019-12-27 04:41:54,109 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-27 04:41:54,970 WARN L192 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2019-12-27 04:41:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:59,674 INFO L93 Difference]: Finished difference Result 332 states and 776 transitions. [2019-12-27 04:41:59,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:41:59,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:59,676 INFO L225 Difference]: With dead ends: 332 [2019-12-27 04:41:59,676 INFO L226 Difference]: Without dead ends: 330 [2019-12-27 04:41:59,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=327, Invalid=797, Unknown=2, NotChecked=64, Total=1190 [2019-12-27 04:41:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2019-12-27 04:41:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 215. [2019-12-27 04:41:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 04:41:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 561 transitions. [2019-12-27 04:41:59,681 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 561 transitions. Word has length 14 [2019-12-27 04:41:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:59,682 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 561 transitions. [2019-12-27 04:41:59,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 561 transitions. [2019-12-27 04:41:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:59,682 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:59,682 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:59,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:59,883 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:59,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 88 times [2019-12-27 04:41:59,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:59,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421048184] [2019-12-27 04:41:59,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:00,002 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 04:42:00,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421048184] [2019-12-27 04:42:00,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676037425] [2019-12-27 04:42:00,002 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 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 04:42:00,045 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:00,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:00,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:00,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:02,398 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 04:42:02,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:02,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:02,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279813646] [2019-12-27 04:42:02,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:02,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:02,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:02,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=228, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:02,399 INFO L87 Difference]: Start difference. First operand 215 states and 561 transitions. Second operand 18 states. [2019-12-27 04:42:03,161 WARN L192 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-27 04:42:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:04,776 INFO L93 Difference]: Finished difference Result 367 states and 855 transitions. [2019-12-27 04:42:04,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:42:04,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:04,777 INFO L225 Difference]: With dead ends: 367 [2019-12-27 04:42:04,778 INFO L226 Difference]: Without dead ends: 365 [2019-12-27 04:42:04,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=293, Invalid=697, Unknown=2, NotChecked=0, Total=992 [2019-12-27 04:42:04,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2019-12-27 04:42:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 226. [2019-12-27 04:42:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-12-27 04:42:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 605 transitions. [2019-12-27 04:42:04,783 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 605 transitions. Word has length 14 [2019-12-27 04:42:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:04,784 INFO L462 AbstractCegarLoop]: Abstraction has 226 states and 605 transitions. [2019-12-27 04:42:04,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 605 transitions. [2019-12-27 04:42:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:04,784 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:04,785 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:04,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:04,988 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:04,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 89 times [2019-12-27 04:42:04,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:04,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542790305] [2019-12-27 04:42:04,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:05,080 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 04:42:05,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542790305] [2019-12-27 04:42:05,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162475343] [2019-12-27 04:42:05,081 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 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 04:42:05,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:42:05,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:05,127 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:05,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:05,726 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_267 Int)) (and (<= (div (+ (* v_~i~0_267 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_267 c_~i~0 2)) (<= c_~i~0 (+ (* 2 v_~i~0_267) 2)))) is different from true [2019-12-27 04:42:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-27 04:42:05,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:05,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:05,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058623879] [2019-12-27 04:42:05,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:05,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:05,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=205, Unknown=1, NotChecked=30, Total=306 [2019-12-27 04:42:05,776 INFO L87 Difference]: Start difference. First operand 226 states and 605 transitions. Second operand 18 states. [2019-12-27 04:42:07,769 WARN L192 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2019-12-27 04:42:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:09,508 INFO L93 Difference]: Finished difference Result 355 states and 835 transitions. [2019-12-27 04:42:09,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:09,508 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:09,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:09,509 INFO L225 Difference]: With dead ends: 355 [2019-12-27 04:42:09,510 INFO L226 Difference]: Without dead ends: 353 [2019-12-27 04:42:09,510 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=4, NotChecked=64, Total=1190 [2019-12-27 04:42:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2019-12-27 04:42:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 224. [2019-12-27 04:42:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-12-27 04:42:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 598 transitions. [2019-12-27 04:42:09,514 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 598 transitions. Word has length 14 [2019-12-27 04:42:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:09,514 INFO L462 AbstractCegarLoop]: Abstraction has 224 states and 598 transitions. [2019-12-27 04:42:09,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:09,514 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 598 transitions. [2019-12-27 04:42:09,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:09,515 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:09,516 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:09,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:09,717 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:09,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 90 times [2019-12-27 04:42:09,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:09,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187785633] [2019-12-27 04:42:09,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:09,839 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 04:42:09,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187785633] [2019-12-27 04:42:09,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478531531] [2019-12-27 04:42:09,839 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 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 04:42:09,884 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:09,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:09,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:09,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:11,000 WARN L192 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:42:11,047 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 04:42:11,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:11,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:11,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240125713] [2019-12-27 04:42:11,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:11,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:11,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:11,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:11,048 INFO L87 Difference]: Start difference. First operand 224 states and 598 transitions. Second operand 18 states. [2019-12-27 04:42:11,727 WARN L192 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2019-12-27 04:42:11,881 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2019-12-27 04:42:13,032 WARN L192 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-27 04:42:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:13,162 INFO L93 Difference]: Finished difference Result 355 states and 833 transitions. [2019-12-27 04:42:13,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:13,163 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:13,164 INFO L225 Difference]: With dead ends: 355 [2019-12-27 04:42:13,164 INFO L226 Difference]: Without dead ends: 353 [2019-12-27 04:42:13,164 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=369, Invalid=891, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:42:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2019-12-27 04:42:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 227. [2019-12-27 04:42:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-12-27 04:42:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 610 transitions. [2019-12-27 04:42:13,170 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 610 transitions. Word has length 14 [2019-12-27 04:42:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:13,170 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 610 transitions. [2019-12-27 04:42:13,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 610 transitions. [2019-12-27 04:42:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:13,171 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:13,171 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:13,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:13,372 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:13,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 91 times [2019-12-27 04:42:13,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:13,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382551566] [2019-12-27 04:42:13,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:13,463 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 04:42:13,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382551566] [2019-12-27 04:42:13,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059719098] [2019-12-27 04:42:13,464 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 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 04:42:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:13,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:13,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:14,582 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 04:42:14,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:14,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:14,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673537143] [2019-12-27 04:42:14,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:14,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:14,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:14,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:14,583 INFO L87 Difference]: Start difference. First operand 227 states and 610 transitions. Second operand 18 states. [2019-12-27 04:42:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:15,744 INFO L93 Difference]: Finished difference Result 362 states and 858 transitions. [2019-12-27 04:42:15,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:15,745 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:15,746 INFO L225 Difference]: With dead ends: 362 [2019-12-27 04:42:15,746 INFO L226 Difference]: Without dead ends: 360 [2019-12-27 04:42:15,746 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=410, Invalid=922, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2019-12-27 04:42:15,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 225. [2019-12-27 04:42:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-12-27 04:42:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 602 transitions. [2019-12-27 04:42:15,751 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 602 transitions. Word has length 14 [2019-12-27 04:42:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:15,751 INFO L462 AbstractCegarLoop]: Abstraction has 225 states and 602 transitions. [2019-12-27 04:42:15,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 602 transitions. [2019-12-27 04:42:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:15,751 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:15,751 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:15,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:15,952 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:15,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 92 times [2019-12-27 04:42:15,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:15,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890520766] [2019-12-27 04:42:15,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:16,051 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 04:42:16,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890520766] [2019-12-27 04:42:16,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37656193] [2019-12-27 04:42:16,052 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 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 04:42:16,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:16,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:16,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:16,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:16,211 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 04:42:16,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:16,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:16,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581330576] [2019-12-27 04:42:16,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:16,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:16,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:16,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:16,213 INFO L87 Difference]: Start difference. First operand 225 states and 602 transitions. Second operand 18 states. [2019-12-27 04:42:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:16,867 INFO L93 Difference]: Finished difference Result 315 states and 749 transitions. [2019-12-27 04:42:16,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 04:42:16,868 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:16,869 INFO L225 Difference]: With dead ends: 315 [2019-12-27 04:42:16,869 INFO L226 Difference]: Without dead ends: 303 [2019-12-27 04:42:16,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 04:42:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2019-12-27 04:42:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 228. [2019-12-27 04:42:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-12-27 04:42:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 606 transitions. [2019-12-27 04:42:16,874 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 606 transitions. Word has length 14 [2019-12-27 04:42:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:16,875 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 606 transitions. [2019-12-27 04:42:16,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 606 transitions. [2019-12-27 04:42:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:16,875 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:16,875 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:17,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:17,076 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:17,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 93 times [2019-12-27 04:42:17,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:17,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119651039] [2019-12-27 04:42:17,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:17,169 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 04:42:17,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119651039] [2019-12-27 04:42:17,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532258892] [2019-12-27 04:42:17,170 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:42:17,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:42:17,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:17,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:17,218 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:17,358 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 04:42:17,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:17,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:17,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208656551] [2019-12-27 04:42:17,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:17,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:17,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:17,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:17,359 INFO L87 Difference]: Start difference. First operand 228 states and 606 transitions. Second operand 18 states. [2019-12-27 04:42:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:17,993 INFO L93 Difference]: Finished difference Result 357 states and 834 transitions. [2019-12-27 04:42:17,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:17,994 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:17,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:17,995 INFO L225 Difference]: With dead ends: 357 [2019-12-27 04:42:17,995 INFO L226 Difference]: Without dead ends: 355 [2019-12-27 04:42:17,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2019-12-27 04:42:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 227. [2019-12-27 04:42:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-12-27 04:42:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 603 transitions. [2019-12-27 04:42:18,001 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 603 transitions. Word has length 14 [2019-12-27 04:42:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:18,001 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 603 transitions. [2019-12-27 04:42:18,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:18,002 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 603 transitions. [2019-12-27 04:42:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:18,002 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:18,002 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:18,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:18,206 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 94 times [2019-12-27 04:42:18,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:18,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056958531] [2019-12-27 04:42:18,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:18,295 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 04:42:18,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056958531] [2019-12-27 04:42:18,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863243452] [2019-12-27 04:42:18,296 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 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 04:42:18,341 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:18,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:18,342 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:18,342 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:18,476 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 04:42:18,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:18,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:18,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976431221] [2019-12-27 04:42:18,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:18,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:18,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:18,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:18,478 INFO L87 Difference]: Start difference. First operand 227 states and 603 transitions. Second operand 18 states. [2019-12-27 04:42:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:19,133 INFO L93 Difference]: Finished difference Result 365 states and 856 transitions. [2019-12-27 04:42:19,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:19,134 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:19,135 INFO L225 Difference]: With dead ends: 365 [2019-12-27 04:42:19,135 INFO L226 Difference]: Without dead ends: 363 [2019-12-27 04:42:19,135 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:19,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2019-12-27 04:42:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 227. [2019-12-27 04:42:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-12-27 04:42:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 604 transitions. [2019-12-27 04:42:19,140 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 604 transitions. Word has length 14 [2019-12-27 04:42:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:19,140 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 604 transitions. [2019-12-27 04:42:19,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 604 transitions. [2019-12-27 04:42:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:19,141 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:19,141 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:19,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:19,342 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:19,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 95 times [2019-12-27 04:42:19,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:19,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183689767] [2019-12-27 04:42:19,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:19,432 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 04:42:19,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183689767] [2019-12-27 04:42:19,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284320407] [2019-12-27 04:42:19,433 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 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 04:42:19,476 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:42:19,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:19,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:19,478 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:19,606 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 04:42:19,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:19,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:19,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323931760] [2019-12-27 04:42:19,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:19,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:19,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:19,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:19,608 INFO L87 Difference]: Start difference. First operand 227 states and 604 transitions. Second operand 18 states. [2019-12-27 04:42:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:20,112 INFO L93 Difference]: Finished difference Result 366 states and 847 transitions. [2019-12-27 04:42:20,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:20,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:20,114 INFO L225 Difference]: With dead ends: 366 [2019-12-27 04:42:20,114 INFO L226 Difference]: Without dead ends: 364 [2019-12-27 04:42:20,115 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-12-27 04:42:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 229. [2019-12-27 04:42:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-12-27 04:42:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 612 transitions. [2019-12-27 04:42:20,119 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 612 transitions. Word has length 14 [2019-12-27 04:42:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:20,119 INFO L462 AbstractCegarLoop]: Abstraction has 229 states and 612 transitions. [2019-12-27 04:42:20,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 612 transitions. [2019-12-27 04:42:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:20,120 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:20,120 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:20,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:20,321 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:20,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 96 times [2019-12-27 04:42:20,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:20,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446260511] [2019-12-27 04:42:20,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:20,421 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 04:42:20,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446260511] [2019-12-27 04:42:20,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983466327] [2019-12-27 04:42:20,421 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 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 04:42:20,467 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:42:20,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:20,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:20,469 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:20,601 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 04:42:20,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:20,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:20,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343179061] [2019-12-27 04:42:20,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:20,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:20,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:20,603 INFO L87 Difference]: Start difference. First operand 229 states and 612 transitions. Second operand 18 states. [2019-12-27 04:42:20,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:20,984 INFO L93 Difference]: Finished difference Result 366 states and 862 transitions. [2019-12-27 04:42:20,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:42:20,984 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:20,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:20,985 INFO L225 Difference]: With dead ends: 366 [2019-12-27 04:42:20,986 INFO L226 Difference]: Without dead ends: 364 [2019-12-27 04:42:20,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:42:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-12-27 04:42:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 227. [2019-12-27 04:42:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-12-27 04:42:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 604 transitions. [2019-12-27 04:42:20,991 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 604 transitions. Word has length 14 [2019-12-27 04:42:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:20,991 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 604 transitions. [2019-12-27 04:42:20,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 604 transitions. [2019-12-27 04:42:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:20,992 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:20,992 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:21,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:21,192 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:21,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:21,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 97 times [2019-12-27 04:42:21,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:21,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402422905] [2019-12-27 04:42:21,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:21,285 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 04:42:21,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402422905] [2019-12-27 04:42:21,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281898846] [2019-12-27 04:42:21,286 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 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 04:42:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:21,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:21,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:21,458 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 04:42:21,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:21,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:21,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471566994] [2019-12-27 04:42:21,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:21,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:21,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:21,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:21,460 INFO L87 Difference]: Start difference. First operand 227 states and 604 transitions. Second operand 18 states. [2019-12-27 04:42:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:22,010 INFO L93 Difference]: Finished difference Result 367 states and 855 transitions. [2019-12-27 04:42:22,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:22,011 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:22,012 INFO L225 Difference]: With dead ends: 367 [2019-12-27 04:42:22,012 INFO L226 Difference]: Without dead ends: 365 [2019-12-27 04:42:22,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2019-12-27 04:42:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 228. [2019-12-27 04:42:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-12-27 04:42:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 608 transitions. [2019-12-27 04:42:22,018 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 608 transitions. Word has length 14 [2019-12-27 04:42:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:22,019 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 608 transitions. [2019-12-27 04:42:22,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 608 transitions. [2019-12-27 04:42:22,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:22,019 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:22,019 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:22,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:22,222 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 98 times [2019-12-27 04:42:22,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:22,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643308693] [2019-12-27 04:42:22,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:22,320 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 04:42:22,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643308693] [2019-12-27 04:42:22,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733834651] [2019-12-27 04:42:22,320 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 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 04:42:22,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:22,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:22,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:22,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:22,947 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 04:42:22,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:22,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:22,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609929423] [2019-12-27 04:42:22,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:22,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:22,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:22,949 INFO L87 Difference]: Start difference. First operand 228 states and 608 transitions. Second operand 18 states. [2019-12-27 04:42:25,498 WARN L192 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2019-12-27 04:42:26,241 WARN L192 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:42:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:26,260 INFO L93 Difference]: Finished difference Result 349 states and 821 transitions. [2019-12-27 04:42:26,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:26,261 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:26,262 INFO L225 Difference]: With dead ends: 349 [2019-12-27 04:42:26,262 INFO L226 Difference]: Without dead ends: 347 [2019-12-27 04:42:26,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=339, Invalid=850, Unknown=1, NotChecked=0, Total=1190 [2019-12-27 04:42:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2019-12-27 04:42:26,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 225. [2019-12-27 04:42:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-12-27 04:42:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 596 transitions. [2019-12-27 04:42:26,267 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 596 transitions. Word has length 14 [2019-12-27 04:42:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:26,267 INFO L462 AbstractCegarLoop]: Abstraction has 225 states and 596 transitions. [2019-12-27 04:42:26,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:26,267 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 596 transitions. [2019-12-27 04:42:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:26,267 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:26,268 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:26,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:26,471 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:26,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935461, now seen corresponding path program 99 times [2019-12-27 04:42:26,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:26,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762755123] [2019-12-27 04:42:26,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:26,555 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 04:42:26,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762755123] [2019-12-27 04:42:26,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007053271] [2019-12-27 04:42:26,556 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 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 04:42:26,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:42:26,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:26,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:26,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:26,728 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 04:42:26,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:26,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:26,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113166647] [2019-12-27 04:42:26,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:26,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:26,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:26,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:26,730 INFO L87 Difference]: Start difference. First operand 225 states and 596 transitions. Second operand 18 states. [2019-12-27 04:42:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:27,206 INFO L93 Difference]: Finished difference Result 262 states and 637 transitions. [2019-12-27 04:42:27,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:42:27,207 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:27,208 INFO L225 Difference]: With dead ends: 262 [2019-12-27 04:42:27,208 INFO L226 Difference]: Without dead ends: 244 [2019-12-27 04:42:27,208 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=917, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:42:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-12-27 04:42:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 218. [2019-12-27 04:42:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 04:42:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 562 transitions. [2019-12-27 04:42:27,213 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 562 transitions. Word has length 14 [2019-12-27 04:42:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:27,213 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 562 transitions. [2019-12-27 04:42:27,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 562 transitions. [2019-12-27 04:42:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:27,214 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:27,214 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:27,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:27,418 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:27,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:27,418 INFO L82 PathProgramCache]: Analyzing trace with hash -591203410, now seen corresponding path program 100 times [2019-12-27 04:42:27,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:27,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130580939] [2019-12-27 04:42:27,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:27,508 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 04:42:27,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130580939] [2019-12-27 04:42:27,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986786071] [2019-12-27 04:42:27,508 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 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 04:42:27,551 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:27,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:27,552 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:27,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:28,636 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 04:42:28,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:28,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:28,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645562807] [2019-12-27 04:42:28,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:28,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:28,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:28,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:28,638 INFO L87 Difference]: Start difference. First operand 218 states and 562 transitions. Second operand 18 states. [2019-12-27 04:42:30,588 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-27 04:42:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:30,626 INFO L93 Difference]: Finished difference Result 253 states and 617 transitions. [2019-12-27 04:42:30,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:42:30,627 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:30,629 INFO L225 Difference]: With dead ends: 253 [2019-12-27 04:42:30,629 INFO L226 Difference]: Without dead ends: 250 [2019-12-27 04:42:30,629 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=285, Invalid=644, Unknown=1, NotChecked=0, Total=930 [2019-12-27 04:42:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-12-27 04:42:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 219. [2019-12-27 04:42:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-12-27 04:42:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 565 transitions. [2019-12-27 04:42:30,634 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 565 transitions. Word has length 14 [2019-12-27 04:42:30,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:30,634 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 565 transitions. [2019-12-27 04:42:30,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 565 transitions. [2019-12-27 04:42:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:30,635 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:30,635 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:30,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:30,835 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:30,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:30,836 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 101 times [2019-12-27 04:42:30,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:30,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754474647] [2019-12-27 04:42:30,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:30,947 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 04:42:30,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754474647] [2019-12-27 04:42:30,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426426935] [2019-12-27 04:42:30,948 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 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 04:42:30,988 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:42:30,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:30,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:30,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:31,126 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 04:42:31,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:31,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:31,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226663615] [2019-12-27 04:42:31,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:31,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:31,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:31,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:31,128 INFO L87 Difference]: Start difference. First operand 219 states and 565 transitions. Second operand 18 states. [2019-12-27 04:42:31,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:31,592 INFO L93 Difference]: Finished difference Result 259 states and 628 transitions. [2019-12-27 04:42:31,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:42:31,593 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:31,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:31,594 INFO L225 Difference]: With dead ends: 259 [2019-12-27 04:42:31,594 INFO L226 Difference]: Without dead ends: 258 [2019-12-27 04:42:31,595 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:42:31,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-12-27 04:42:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 222. [2019-12-27 04:42:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 04:42:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 566 transitions. [2019-12-27 04:42:31,599 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 566 transitions. Word has length 14 [2019-12-27 04:42:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:31,599 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 566 transitions. [2019-12-27 04:42:31,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 566 transitions. [2019-12-27 04:42:31,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:31,599 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:31,599 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:31,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:31,800 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash -591347560, now seen corresponding path program 102 times [2019-12-27 04:42:31,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:31,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618023913] [2019-12-27 04:42:31,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:31,896 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 04:42:31,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618023913] [2019-12-27 04:42:31,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931459499] [2019-12-27 04:42:31,896 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 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 04:42:31,941 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:42:31,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:31,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:31,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:35,131 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 04:42:35,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:35,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:35,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299707657] [2019-12-27 04:42:35,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:35,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:35,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:35,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2019-12-27 04:42:35,133 INFO L87 Difference]: Start difference. First operand 222 states and 566 transitions. Second operand 18 states. [2019-12-27 04:42:36,612 WARN L192 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:42:38,925 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:42:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:38,969 INFO L93 Difference]: Finished difference Result 250 states and 608 transitions. [2019-12-27 04:42:38,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:42:38,970 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:38,971 INFO L225 Difference]: With dead ends: 250 [2019-12-27 04:42:38,971 INFO L226 Difference]: Without dead ends: 246 [2019-12-27 04:42:38,972 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=308, Invalid=680, Unknown=4, NotChecked=0, Total=992 [2019-12-27 04:42:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-27 04:42:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 218. [2019-12-27 04:42:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 04:42:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 552 transitions. [2019-12-27 04:42:38,975 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 552 transitions. Word has length 14 [2019-12-27 04:42:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:38,975 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 552 transitions. [2019-12-27 04:42:38,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 552 transitions. [2019-12-27 04:42:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:38,975 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:38,976 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:39,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:39,176 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 103 times [2019-12-27 04:42:39,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:39,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890387655] [2019-12-27 04:42:39,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:39,291 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 04:42:39,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890387655] [2019-12-27 04:42:39,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726570062] [2019-12-27 04:42:39,292 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 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 04:42:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:39,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:39,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:40,928 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 04:42:40,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:40,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:40,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406143909] [2019-12-27 04:42:40,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:40,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:40,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:40,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:40,931 INFO L87 Difference]: Start difference. First operand 218 states and 552 transitions. Second operand 18 states. [2019-12-27 04:42:41,660 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-27 04:42:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:41,905 INFO L93 Difference]: Finished difference Result 282 states and 667 transitions. [2019-12-27 04:42:41,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:42:41,905 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:41,907 INFO L225 Difference]: With dead ends: 282 [2019-12-27 04:42:41,907 INFO L226 Difference]: Without dead ends: 281 [2019-12-27 04:42:41,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=304, Invalid=687, Unknown=1, NotChecked=0, Total=992 [2019-12-27 04:42:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-27 04:42:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 216. [2019-12-27 04:42:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 04:42:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 546 transitions. [2019-12-27 04:42:41,913 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 546 transitions. Word has length 14 [2019-12-27 04:42:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:41,913 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 546 transitions. [2019-12-27 04:42:41,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 546 transitions. [2019-12-27 04:42:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:41,914 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:41,914 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:42,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:42,118 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:42,118 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 104 times [2019-12-27 04:42:42,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:42,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037872514] [2019-12-27 04:42:42,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:42,206 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 04:42:42,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037872514] [2019-12-27 04:42:42,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282804605] [2019-12-27 04:42:42,207 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 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 04:42:42,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:42,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:42,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:42,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:42,882 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 04:42:42,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:42,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:42,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486944145] [2019-12-27 04:42:42,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:42,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:42,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:42,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:42,890 INFO L87 Difference]: Start difference. First operand 216 states and 546 transitions. Second operand 18 states. [2019-12-27 04:42:43,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:43,471 INFO L93 Difference]: Finished difference Result 272 states and 644 transitions. [2019-12-27 04:42:43,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:42:43,472 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:43,473 INFO L225 Difference]: With dead ends: 272 [2019-12-27 04:42:43,473 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 04:42:43,473 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:42:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 04:42:43,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 216. [2019-12-27 04:42:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 04:42:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 546 transitions. [2019-12-27 04:42:43,479 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 546 transitions. Word has length 14 [2019-12-27 04:42:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:43,479 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 546 transitions. [2019-12-27 04:42:43,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 546 transitions. [2019-12-27 04:42:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:43,480 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:43,480 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:43,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:43,683 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:43,684 INFO L82 PathProgramCache]: Analyzing trace with hash -595969970, now seen corresponding path program 105 times [2019-12-27 04:42:43,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:43,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062110857] [2019-12-27 04:42:43,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:43,774 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 04:42:43,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062110857] [2019-12-27 04:42:43,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404669645] [2019-12-27 04:42:43,774 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 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 04:42:43,817 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:42:43,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:43,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:43,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:44,250 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:42:44,250 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 04:42:44,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:44,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:44,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123556093] [2019-12-27 04:42:44,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:44,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:44,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:44,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:44,252 INFO L87 Difference]: Start difference. First operand 216 states and 546 transitions. Second operand 18 states. [2019-12-27 04:42:45,063 WARN L192 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2019-12-27 04:42:45,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:45,396 INFO L93 Difference]: Finished difference Result 295 states and 687 transitions. [2019-12-27 04:42:45,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:42:45,397 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:45,398 INFO L225 Difference]: With dead ends: 295 [2019-12-27 04:42:45,398 INFO L226 Difference]: Without dead ends: 293 [2019-12-27 04:42:45,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-12-27 04:42:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 212. [2019-12-27 04:42:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 04:42:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 531 transitions. [2019-12-27 04:42:45,402 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 531 transitions. Word has length 14 [2019-12-27 04:42:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:45,402 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 531 transitions. [2019-12-27 04:42:45,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 531 transitions. [2019-12-27 04:42:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:45,403 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:45,403 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:45,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:45,604 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:45,604 INFO L82 PathProgramCache]: Analyzing trace with hash -734498275, now seen corresponding path program 106 times [2019-12-27 04:42:45,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:45,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971948008] [2019-12-27 04:42:45,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:45,702 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 04:42:45,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971948008] [2019-12-27 04:42:45,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087533973] [2019-12-27 04:42:45,702 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 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 04:42:45,747 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:45,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:45,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:45,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:46,810 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 04:42:46,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:46,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:46,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896718913] [2019-12-27 04:42:46,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:46,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:46,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:46,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:46,811 INFO L87 Difference]: Start difference. First operand 212 states and 531 transitions. Second operand 18 states. [2019-12-27 04:42:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:48,276 INFO L93 Difference]: Finished difference Result 286 states and 664 transitions. [2019-12-27 04:42:48,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:42:48,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:48,278 INFO L225 Difference]: With dead ends: 286 [2019-12-27 04:42:48,278 INFO L226 Difference]: Without dead ends: 285 [2019-12-27 04:42:48,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=415, Invalid=1066, Unknown=1, NotChecked=0, Total=1482 [2019-12-27 04:42:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-12-27 04:42:48,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 208. [2019-12-27 04:42:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 04:42:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 517 transitions. [2019-12-27 04:42:48,283 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 517 transitions. Word has length 14 [2019-12-27 04:42:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:48,283 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 517 transitions. [2019-12-27 04:42:48,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 517 transitions. [2019-12-27 04:42:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:48,283 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:48,283 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:48,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:48,484 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:48,485 INFO L82 PathProgramCache]: Analyzing trace with hash -733754519, now seen corresponding path program 107 times [2019-12-27 04:42:48,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:48,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144242425] [2019-12-27 04:42:48,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:48,574 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 04:42:48,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144242425] [2019-12-27 04:42:48,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165384365] [2019-12-27 04:42:48,574 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 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 04:42:48,620 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:42:48,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:48,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:48,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:49,580 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 04:42:49,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:49,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:49,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702630514] [2019-12-27 04:42:49,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:49,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:49,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=231, Unknown=2, NotChecked=0, Total=306 [2019-12-27 04:42:49,581 INFO L87 Difference]: Start difference. First operand 208 states and 517 transitions. Second operand 18 states. [2019-12-27 04:42:50,682 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-12-27 04:42:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:52,540 INFO L93 Difference]: Finished difference Result 305 states and 697 transitions. [2019-12-27 04:42:52,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:42:52,540 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:52,542 INFO L225 Difference]: With dead ends: 305 [2019-12-27 04:42:52,542 INFO L226 Difference]: Without dead ends: 304 [2019-12-27 04:42:52,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=374, Invalid=952, Unknown=6, NotChecked=0, Total=1332 [2019-12-27 04:42:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-12-27 04:42:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 205. [2019-12-27 04:42:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-27 04:42:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 507 transitions. [2019-12-27 04:42:52,547 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 507 transitions. Word has length 14 [2019-12-27 04:42:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:52,548 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 507 transitions. [2019-12-27 04:42:52,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:52,548 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 507 transitions. [2019-12-27 04:42:52,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:52,548 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:52,548 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:52,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:52,749 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:52,749 INFO L82 PathProgramCache]: Analyzing trace with hash -738367319, now seen corresponding path program 108 times [2019-12-27 04:42:52,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:52,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578655100] [2019-12-27 04:42:52,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:52,838 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 04:42:52,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578655100] [2019-12-27 04:42:52,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96002964] [2019-12-27 04:42:52,839 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 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 04:42:52,884 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:52,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:52,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:52,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:53,013 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 04:42:53,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:53,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:53,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383243789] [2019-12-27 04:42:53,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:53,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:53,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:53,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:53,015 INFO L87 Difference]: Start difference. First operand 205 states and 507 transitions. Second operand 18 states. [2019-12-27 04:42:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:53,522 INFO L93 Difference]: Finished difference Result 294 states and 669 transitions. [2019-12-27 04:42:53,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:53,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:53,523 INFO L225 Difference]: With dead ends: 294 [2019-12-27 04:42:53,524 INFO L226 Difference]: Without dead ends: 292 [2019-12-27 04:42:53,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=852, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 04:42:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2019-12-27 04:42:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 203. [2019-12-27 04:42:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 04:42:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 498 transitions. [2019-12-27 04:42:53,529 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 498 transitions. Word has length 14 [2019-12-27 04:42:53,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:53,529 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 498 transitions. [2019-12-27 04:42:53,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:53,529 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 498 transitions. [2019-12-27 04:42:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:53,530 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:53,530 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:53,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:53,734 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:53,734 INFO L82 PathProgramCache]: Analyzing trace with hash -738367474, now seen corresponding path program 109 times [2019-12-27 04:42:53,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:53,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608894943] [2019-12-27 04:42:53,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:53,827 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 04:42:53,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608894943] [2019-12-27 04:42:53,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048507745] [2019-12-27 04:42:53,828 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:42:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:53,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:53,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:54,025 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 04:42:54,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:54,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:54,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241002694] [2019-12-27 04:42:54,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:54,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:54,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:54,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:54,027 INFO L87 Difference]: Start difference. First operand 203 states and 498 transitions. Second operand 18 states. [2019-12-27 04:42:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:54,580 INFO L93 Difference]: Finished difference Result 316 states and 713 transitions. [2019-12-27 04:42:54,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:54,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:54,582 INFO L225 Difference]: With dead ends: 316 [2019-12-27 04:42:54,582 INFO L226 Difference]: Without dead ends: 315 [2019-12-27 04:42:54,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2019-12-27 04:42:54,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 202. [2019-12-27 04:42:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-12-27 04:42:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 494 transitions. [2019-12-27 04:42:54,587 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 494 transitions. Word has length 14 [2019-12-27 04:42:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:54,587 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 494 transitions. [2019-12-27 04:42:54,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 494 transitions. [2019-12-27 04:42:54,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:54,587 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:54,587 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:54,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:54,788 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:54,789 INFO L82 PathProgramCache]: Analyzing trace with hash -738372124, now seen corresponding path program 110 times [2019-12-27 04:42:54,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:54,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696747611] [2019-12-27 04:42:54,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:54,904 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 04:42:54,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696747611] [2019-12-27 04:42:54,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226834150] [2019-12-27 04:42:54,905 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 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 04:42:54,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:54,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:54,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:54,950 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:55,074 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 04:42:55,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:55,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:55,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690826269] [2019-12-27 04:42:55,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:55,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:55,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:55,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:55,076 INFO L87 Difference]: Start difference. First operand 202 states and 494 transitions. Second operand 18 states. [2019-12-27 04:42:55,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:55,461 INFO L93 Difference]: Finished difference Result 323 states and 724 transitions. [2019-12-27 04:42:55,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:42:55,462 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:55,463 INFO L225 Difference]: With dead ends: 323 [2019-12-27 04:42:55,463 INFO L226 Difference]: Without dead ends: 321 [2019-12-27 04:42:55,463 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:42:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-12-27 04:42:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 202. [2019-12-27 04:42:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-12-27 04:42:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 494 transitions. [2019-12-27 04:42:55,466 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 494 transitions. Word has length 14 [2019-12-27 04:42:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:55,466 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 494 transitions. [2019-12-27 04:42:55,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 494 transitions. [2019-12-27 04:42:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:55,467 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:55,467 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:55,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:55,668 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:55,668 INFO L82 PathProgramCache]: Analyzing trace with hash -738372279, now seen corresponding path program 111 times [2019-12-27 04:42:55,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:55,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834196857] [2019-12-27 04:42:55,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:55,760 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 04:42:55,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834196857] [2019-12-27 04:42:55,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905159844] [2019-12-27 04:42:55,761 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 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 04:42:55,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:42:55,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:55,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:55,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:55,969 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 04:42:55,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:55,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:55,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595814262] [2019-12-27 04:42:55,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:55,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:55,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:55,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:55,972 INFO L87 Difference]: Start difference. First operand 202 states and 494 transitions. Second operand 18 states. [2019-12-27 04:42:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:56,659 INFO L93 Difference]: Finished difference Result 330 states and 737 transitions. [2019-12-27 04:42:56,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:56,659 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:56,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:56,661 INFO L225 Difference]: With dead ends: 330 [2019-12-27 04:42:56,661 INFO L226 Difference]: Without dead ends: 328 [2019-12-27 04:42:56,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-27 04:42:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 200. [2019-12-27 04:42:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-27 04:42:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 486 transitions. [2019-12-27 04:42:56,670 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 486 transitions. Word has length 14 [2019-12-27 04:42:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:56,670 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 486 transitions. [2019-12-27 04:42:56,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 486 transitions. [2019-12-27 04:42:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:56,672 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:56,673 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:56,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:56,881 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash -738516274, now seen corresponding path program 112 times [2019-12-27 04:42:56,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:56,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753371587] [2019-12-27 04:42:56,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:57,000 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 04:42:57,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753371587] [2019-12-27 04:42:57,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024133786] [2019-12-27 04:42:57,001 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 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 04:42:57,048 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:57,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:57,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:57,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:57,233 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 04:42:57,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:57,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:57,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694488714] [2019-12-27 04:42:57,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:57,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:57,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:57,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:57,234 INFO L87 Difference]: Start difference. First operand 200 states and 486 transitions. Second operand 18 states. [2019-12-27 04:42:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:57,881 INFO L93 Difference]: Finished difference Result 314 states and 703 transitions. [2019-12-27 04:42:57,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:57,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:57,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:57,883 INFO L225 Difference]: With dead ends: 314 [2019-12-27 04:42:57,883 INFO L226 Difference]: Without dead ends: 312 [2019-12-27 04:42:57,883 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:57,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2019-12-27 04:42:57,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 199. [2019-12-27 04:42:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 04:42:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 482 transitions. [2019-12-27 04:42:57,887 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 482 transitions. Word has length 14 [2019-12-27 04:42:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:57,887 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 482 transitions. [2019-12-27 04:42:57,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 482 transitions. [2019-12-27 04:42:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:57,888 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:57,888 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:58,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:58,090 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash -738516429, now seen corresponding path program 113 times [2019-12-27 04:42:58,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:58,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040141562] [2019-12-27 04:42:58,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:58,200 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 04:42:58,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040141562] [2019-12-27 04:42:58,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410811043] [2019-12-27 04:42:58,201 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 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 04:42:58,246 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:42:58,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:58,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:58,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:59,810 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 04:42:59,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:59,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:59,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919620385] [2019-12-27 04:42:59,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:59,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:59,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=229, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:59,812 INFO L87 Difference]: Start difference. First operand 199 states and 482 transitions. Second operand 18 states. Received shutdown request... [2019-12-27 04:43:02,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:43:02,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:02,305 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 04:43:02,310 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 04:43:02,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 04:43:02 BasicIcfg [2019-12-27 04:43:02,310 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 04:43:02,311 INFO L168 Benchmark]: Toolchain (without parser) took 279937.31 ms. Allocated memory was 138.9 MB in the beginning and 231.7 MB in the end (delta: 92.8 MB). Free memory was 101.2 MB in the beginning and 114.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 79.7 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:02,312 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-27 04:43:02,312 INFO L168 Benchmark]: CACSL2BoogieTranslator took 659.18 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 101.0 MB in the beginning and 163.3 MB in the end (delta: -62.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:02,312 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.77 ms. Allocated memory is still 203.9 MB. Free memory was 163.3 MB in the beginning and 161.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:02,313 INFO L168 Benchmark]: Boogie Preprocessor took 26.15 ms. Allocated memory is still 203.9 MB. Free memory was 161.4 MB in the beginning and 159.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:02,313 INFO L168 Benchmark]: RCFGBuilder took 421.27 ms. Allocated memory is still 203.9 MB. Free memory was 159.4 MB in the beginning and 139.8 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:02,313 INFO L168 Benchmark]: TraceAbstraction took 278767.43 ms. Allocated memory was 203.9 MB in the beginning and 231.7 MB in the end (delta: 27.8 MB). Free memory was 139.2 MB in the beginning and 114.3 MB in the end (delta: 24.8 MB). Peak memory consumption was 52.6 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:02,315 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 138.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 659.18 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 101.0 MB in the beginning and 163.3 MB in the end (delta: -62.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 57.77 ms. Allocated memory is still 203.9 MB. Free memory was 163.3 MB in the beginning and 161.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.15 ms. Allocated memory is still 203.9 MB. Free memory was 161.4 MB in the beginning and 159.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.27 ms. Allocated memory is still 203.9 MB. Free memory was 159.4 MB in the beginning and 139.8 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 278767.43 ms. Allocated memory was 203.9 MB in the beginning and 231.7 MB in the end (delta: 27.8 MB). Free memory was 139.2 MB in the beginning and 114.3 MB in the end (delta: 24.8 MB). Peak memory consumption was 52.6 MB. 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, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (199states) and FLOYD_HOARE automaton (currently 10 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 25 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 278.6s, OverallIterations: 128, TraceHistogramMax: 7, AutomataDifference: 138.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1294 SDtfs, 20137 SDslu, 11828 SDs, 0 SdLazy, 6920 SolverSat, 4213 SolverUnsat, 23 SolverUnknown, 0 SolverNotchecked, 37.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3785 GetRequests, 609 SyntacticMatches, 16 SemanticMatches, 3159 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 18914 ImplicationChecksByTransitivity, 199.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=229occurred in iteration=110, 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, 127 MinimizatonAttempts, 7500 StatesRemovedByMinimization, 124 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 105.7s InterpolantComputationTime, 3203 NumberOfCodeBlocks, 3203 NumberOfCodeBlocksAsserted, 417 NumberOfCheckSat, 2952 ConstructedInterpolants, 117 QuantifiedInterpolants, 447312 SizeOfPredicates, 0 NumberOfNonLiveVariables, 11470 ConjunctsInSsa, 1343 ConjunctsInUnsatCore, 251 InterpolantComputations, 7 PerfectInterpolantSequences, 42/1978 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