/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 02:21:13,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 02:21:13,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 02:21:13,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 02:21:13,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 02:21:13,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 02:21:13,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 02:21:13,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 02:21:13,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 02:21:13,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 02:21:13,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 02:21:13,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 02:21:13,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 02:21:13,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 02:21:13,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 02:21:13,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 02:21:13,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 02:21:13,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 02:21:13,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 02:21:13,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 02:21:13,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 02:21:13,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 02:21:13,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 02:21:13,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 02:21:13,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-17 02:21:13,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-17 02:21:13,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-17 02:21:13,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-17 02:21:13,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-17 02:21:13,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-17 02:21:13,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-17 02:21:13,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-17 02:21:13,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-17 02:21:13,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-17 02:21:13,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-17 02:21:13,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-17 02:21:13,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-17 02:21:13,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-17 02:21:13,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 02:21:13,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 02:21:13,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 02:21:13,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-17 02:21:13,392 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 02:21:13,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 02:21:13,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 02:21:13,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 02:21:13,396 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 02:21:13,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 02:21:13,396 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 02:21:13,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 02:21:13,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 02:21:13,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 02:21:13,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 02:21:13,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 02:21:13,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 02:21:13,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 02:21:13,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 02:21:13,400 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 02:21:13,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 02:21:13,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 02:21:13,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 02:21:13,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 02:21:13,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 02:21:13,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 02:21:13,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 02:21:13,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 02:21:13,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 02:21:13,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 02:21:13,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 02:21:13,404 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 02:21:13,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 02:21:14,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 02:21:14,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 02:21:14,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 02:21:14,502 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 02:21:14,503 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 02:21:14,504 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-17 02:21:14,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8421993a6/037735dec041472a984e02714902cf67/FLAG88137c7ea [2020-09-17 02:21:15,230 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 02:21:15,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-17 02:21:15,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8421993a6/037735dec041472a984e02714902cf67/FLAG88137c7ea [2020-09-17 02:21:15,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8421993a6/037735dec041472a984e02714902cf67 [2020-09-17 02:21:15,520 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 02:21:15,526 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 02:21:15,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 02:21:15,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 02:21:15,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 02:21:15,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:21:15" (1/1) ... [2020-09-17 02:21:15,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@545816cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:15, skipping insertion in model container [2020-09-17 02:21:15,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:21:15" (1/1) ... [2020-09-17 02:21:15,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 02:21:15,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 02:21:16,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:21:16,188 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 02:21:16,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:21:16,341 INFO L208 MainTranslator]: Completed translation [2020-09-17 02:21:16,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16 WrapperNode [2020-09-17 02:21:16,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 02:21:16,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 02:21:16,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 02:21:16,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 02:21:16,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 02:21:16,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 02:21:16,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 02:21:16,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 02:21:16,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... [2020-09-17 02:21:16,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 02:21:16,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 02:21:16,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 02:21:16,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 02:21:16,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 02:21:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-17 02:21:16,535 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-17 02:21:16,535 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-17 02:21:16,536 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-17 02:21:16,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 02:21:16,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-17 02:21:16,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 02:21:16,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 02:21:16,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-17 02:21:16,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 02:21:16,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 02:21:16,540 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 02:21:16,902 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 02:21:16,902 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-17 02:21:16,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:21:16 BoogieIcfgContainer [2020-09-17 02:21:16,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 02:21:16,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 02:21:16,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 02:21:16,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 02:21:16,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:21:15" (1/3) ... [2020-09-17 02:21:16,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695d3227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:21:16, skipping insertion in model container [2020-09-17 02:21:16,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:21:16" (2/3) ... [2020-09-17 02:21:16,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695d3227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:21:16, skipping insertion in model container [2020-09-17 02:21:16,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:21:16" (3/3) ... [2020-09-17 02:21:16,918 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-09-17 02:21:16,931 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 02:21:16,932 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 02:21:16,941 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 02:21:16,942 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 02:21:16,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,976 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,977 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,978 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,978 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,981 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,982 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,982 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,982 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,982 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,983 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,987 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,988 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,988 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,988 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,989 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:16,989 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:17,002 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:17,002 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:17,003 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:17,003 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:17,003 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:17,004 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:21:17,034 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-17 02:21:17,059 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 02:21:17,059 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 02:21:17,060 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 02:21:17,060 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-17 02:21:17,060 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 02:21:17,060 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 02:21:17,060 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 02:21:17,061 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 02:21:17,079 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-17 02:21:17,082 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-17 02:21:17,129 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-17 02:21:17,130 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:21:17,136 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-17 02:21:17,139 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-17 02:21:17,160 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-17 02:21:17,161 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:21:17,162 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-17 02:21:17,164 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-17 02:21:17,166 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 02:21:18,262 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-17 02:21:18,362 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-17 02:21:18,362 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-17 02:21:18,368 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-17 02:21:18,382 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-17 02:21:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-17 02:21:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-17 02:21:18,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:18,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-17 02:21:18,398 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:18,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-17 02:21:18,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:18,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825075850] [2020-09-17 02:21:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:18,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825075850] [2020-09-17 02:21:18,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:18,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-17 02:21:18,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935759870] [2020-09-17 02:21:18,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 02:21:18,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:18,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 02:21:18,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 02:21:18,736 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-17 02:21:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:18,812 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-17 02:21:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 02:21:18,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-17 02:21:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:18,831 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:21:18,831 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:21:18,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:21:18,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:21:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-17 02:21:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:21:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-17 02:21:18,890 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-17 02:21:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:18,891 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-17 02:21:18,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 02:21:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-17 02:21:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 02:21:18,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:18,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:18,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 02:21:18,893 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:18,894 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-17 02:21:18,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:18,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765168387] [2020-09-17 02:21:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:19,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765168387] [2020-09-17 02:21:19,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:19,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 02:21:19,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307178358] [2020-09-17 02:21:19,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 02:21:19,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:19,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 02:21:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:21:19,033 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-17 02:21:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:19,096 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-17 02:21:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:21:19,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 02:21:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:19,099 INFO L225 Difference]: With dead ends: 80 [2020-09-17 02:21:19,099 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 02:21:19,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-17 02:21:19,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 02:21:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-17 02:21:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 02:21:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-17 02:21:19,112 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-17 02:21:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:19,113 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-17 02:21:19,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 02:21:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-17 02:21:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 02:21:19,115 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:19,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:19,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 02:21:19,115 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:19,116 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-17 02:21:19,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:19,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442878902] [2020-09-17 02:21:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:19,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442878902] [2020-09-17 02:21:19,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:19,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 02:21:19,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199580419] [2020-09-17 02:21:19,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 02:21:19,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:19,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 02:21:19,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:21:19,243 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-17 02:21:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:19,276 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-17 02:21:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 02:21:19,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 02:21:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:19,278 INFO L225 Difference]: With dead ends: 73 [2020-09-17 02:21:19,278 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 02:21:19,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:21:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 02:21:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-17 02:21:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:21:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-17 02:21:19,289 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-17 02:21:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:19,289 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-17 02:21:19,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 02:21:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-17 02:21:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 02:21:19,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:19,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:19,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 02:21:19,291 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-17 02:21:19,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:19,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153787300] [2020-09-17 02:21:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:19,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153787300] [2020-09-17 02:21:19,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:19,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 02:21:19,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134898004] [2020-09-17 02:21:19,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 02:21:19,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:19,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 02:21:19,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:21:19,395 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-17 02:21:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:19,450 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-17 02:21:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:21:19,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 02:21:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:19,453 INFO L225 Difference]: With dead ends: 86 [2020-09-17 02:21:19,453 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:21:19,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-17 02:21:19,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:21:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-17 02:21:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:21:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-17 02:21:19,462 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-17 02:21:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:19,463 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-17 02:21:19,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 02:21:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-17 02:21:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-17 02:21:19,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:19,464 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:19,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-17 02:21:19,465 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:19,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:19,465 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-17 02:21:19,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:19,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688477545] [2020-09-17 02:21:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:19,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688477545] [2020-09-17 02:21:19,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197062967] [2020-09-17 02:21:19,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:19,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:19,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:19,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:21:19,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:19,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:19,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:19,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-17 02:21:19,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926238308] [2020-09-17 02:21:19,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:21:19,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:19,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:21:19,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:21:19,795 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-17 02:21:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:19,872 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-17 02:21:19,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:19,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-17 02:21:19,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:19,874 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:21:19,874 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:21:19,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:21:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-17 02:21:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:21:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-17 02:21:19,883 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-17 02:21:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:19,883 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-17 02:21:19,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:21:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-17 02:21:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-17 02:21:19,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:19,885 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:20,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:20,100 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:20,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-17 02:21:20,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:20,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549227819] [2020-09-17 02:21:20,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:20,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549227819] [2020-09-17 02:21:20,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129238371] [2020-09-17 02:21:20,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:20,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:20,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:20,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:21:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:20,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:20,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-17 02:21:20,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910869650] [2020-09-17 02:21:20,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:21:20,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:21:20,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:21:20,323 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-17 02:21:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:20,393 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-17 02:21:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:21:20,394 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-17 02:21:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:20,395 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:21:20,395 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:21:20,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:21:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:21:20,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-09-17 02:21:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:21:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 183 transitions. [2020-09-17 02:21:20,413 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 183 transitions. Word has length 9 [2020-09-17 02:21:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:20,414 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 183 transitions. [2020-09-17 02:21:20,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:21:20,415 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 183 transitions. [2020-09-17 02:21:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-17 02:21:20,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:20,416 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:20,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:20,633 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:20,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:20,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-17 02:21:20,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:20,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333673675] [2020-09-17 02:21:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:20,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333673675] [2020-09-17 02:21:20,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800683712] [2020-09-17 02:21:20,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:20,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:20,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:20,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:21:20,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:20,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:20,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-17 02:21:20,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017397624] [2020-09-17 02:21:20,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:21:20,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:20,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:21:20,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:21:20,835 INFO L87 Difference]: Start difference. First operand 76 states and 183 transitions. Second operand 9 states. [2020-09-17 02:21:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:20,945 INFO L93 Difference]: Finished difference Result 94 states and 221 transitions. [2020-09-17 02:21:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:21:20,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-17 02:21:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:20,947 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:21:20,947 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:21:20,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:21:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:21:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-09-17 02:21:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:21:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 190 transitions. [2020-09-17 02:21:20,955 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 190 transitions. Word has length 9 [2020-09-17 02:21:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:20,955 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 190 transitions. [2020-09-17 02:21:20,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:21:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 190 transitions. [2020-09-17 02:21:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-17 02:21:20,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:20,957 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:21,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:21,171 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-17 02:21:21,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:21,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531776925] [2020-09-17 02:21:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:21,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531776925] [2020-09-17 02:21:21,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116436734] [2020-09-17 02:21:21,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:21,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:21,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:21,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:21:21,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:21,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:21,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:21,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-17 02:21:21,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716712718] [2020-09-17 02:21:21,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:21:21,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:21,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:21:21,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:21:21,419 INFO L87 Difference]: Start difference. First operand 78 states and 190 transitions. Second operand 9 states. [2020-09-17 02:21:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:21,603 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-17 02:21:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:21,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-17 02:21:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:21,605 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:21:21,605 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:21:21,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:21:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:21:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2020-09-17 02:21:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:21:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-17 02:21:21,618 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 9 [2020-09-17 02:21:21,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:21,618 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-17 02:21:21,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:21:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-17 02:21:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:21,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:21,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:21,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:21,839 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:21,839 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 1 times [2020-09-17 02:21:21,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:21,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217698676] [2020-09-17 02:21:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:21,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217698676] [2020-09-17 02:21:21,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:21,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:21:21,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27710338] [2020-09-17 02:21:21,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:21:21,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:21,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:21:21,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:21:21,919 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-17 02:21:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:21,971 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-17 02:21:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:21:21,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:21:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:21,973 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:21:21,973 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:21:21,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-17 02:21:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:21:21,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-17 02:21:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:21:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-17 02:21:21,991 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-17 02:21:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:21,991 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-17 02:21:21,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:21:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-17 02:21:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:21,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:21,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:21,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-17 02:21:21,997 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:21,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:21,998 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 2 times [2020-09-17 02:21:21,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:21,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428263551] [2020-09-17 02:21:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:22,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428263551] [2020-09-17 02:21:22,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:22,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:21:22,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508246575] [2020-09-17 02:21:22,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:21:22,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:22,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:21:22,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:21:22,100 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-17 02:21:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:22,178 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-17 02:21:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:22,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:21:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:22,180 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:21:22,180 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:21:22,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:21:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:21:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-17 02:21:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:21:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-17 02:21:22,187 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-17 02:21:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:22,188 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-17 02:21:22,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:21:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-17 02:21:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:22,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:22,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:22,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-17 02:21:22,190 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:22,190 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 3 times [2020-09-17 02:21:22,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:22,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776507517] [2020-09-17 02:21:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:22,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776507517] [2020-09-17 02:21:22,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:21:22,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:21:22,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342870265] [2020-09-17 02:21:22,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:21:22,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:22,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:21:22,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:21:22,260 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-17 02:21:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:22,339 INFO L93 Difference]: Finished difference Result 105 states and 248 transitions. [2020-09-17 02:21:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:22,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:21:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:22,342 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:21:22,342 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:21:22,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:21:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:21:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-17 02:21:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:21:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-17 02:21:22,349 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-17 02:21:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:22,349 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-17 02:21:22,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:21:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-17 02:21:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:22,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:22,351 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:22,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-17 02:21:22,351 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:22,351 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-17 02:21:22,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:22,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770390733] [2020-09-17 02:21:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:22,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770390733] [2020-09-17 02:21:22,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060654553] [2020-09-17 02:21:22,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:22,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:22,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:22,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:22,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:22,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:22,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:22,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-17 02:21:22,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898044503] [2020-09-17 02:21:22,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:21:22,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:22,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:21:22,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:21:22,607 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-17 02:21:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:22,715 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-17 02:21:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:22,715 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-17 02:21:22,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:22,717 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:21:22,717 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:21:22,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:21:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-17 02:21:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:21:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-17 02:21:22,723 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-17 02:21:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:22,723 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-17 02:21:22,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:21:22,723 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-17 02:21:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:22,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:22,724 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:22,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-17 02:21:22,937 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:22,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:22,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-17 02:21:22,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:22,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289083510] [2020-09-17 02:21:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:23,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289083510] [2020-09-17 02:21:23,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748450961] [2020-09-17 02:21:23,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:23,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:23,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:23,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:23,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:23,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:23,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:23,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751217545] [2020-09-17 02:21:23,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:23,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:23,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:23,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:23,151 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-17 02:21:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:23,238 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-17 02:21:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:21:23,239 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-17 02:21:23,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:23,240 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:21:23,240 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:21:23,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:21:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:21:23,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-17 02:21:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:21:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-17 02:21:23,246 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-17 02:21:23,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:23,246 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-17 02:21:23,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:23,246 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-17 02:21:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:23,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:23,247 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:23,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:23,454 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-17 02:21:23,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:23,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617130237] [2020-09-17 02:21:23,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:23,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617130237] [2020-09-17 02:21:23,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552175062] [2020-09-17 02:21:23,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:23,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:23,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:23,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605506480] [2020-09-17 02:21:23,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:23,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:23,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:23,695 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-17 02:21:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:23,823 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-17 02:21:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:23,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-17 02:21:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:23,826 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:21:23,826 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:21:23,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:21:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:21:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-17 02:21:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:21:23,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-17 02:21:23,831 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-17 02:21:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:23,831 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-17 02:21:23,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-17 02:21:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:23,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:23,832 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:24,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-17 02:21:24,047 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-17 02:21:24,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:24,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899010629] [2020-09-17 02:21:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:24,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899010629] [2020-09-17 02:21:24,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601253119] [2020-09-17 02:21:24,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:24,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:24,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:24,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:24,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:24,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:24,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:24,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346918286] [2020-09-17 02:21:24,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:24,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:24,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:24,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:24,304 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-17 02:21:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:24,466 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-17 02:21:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:24,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-17 02:21:24,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:24,468 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:21:24,468 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:21:24,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:24,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:21:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-17 02:21:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:21:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-17 02:21:24,473 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-17 02:21:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:24,474 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-17 02:21:24,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-17 02:21:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:21:24,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:24,475 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:24,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 02:21:24,686 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:24,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:24,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-17 02:21:24,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:24,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570374787] [2020-09-17 02:21:24,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:24,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570374787] [2020-09-17 02:21:24,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789163919] [2020-09-17 02:21:24,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:24,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:24,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:24,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:24,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:24,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:24,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:24,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:24,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727410874] [2020-09-17 02:21:24,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:24,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:24,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:24,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:24,946 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-17 02:21:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:25,127 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-17 02:21:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:25,128 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-17 02:21:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:25,129 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:21:25,130 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:21:25,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:21:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:21:25,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-17 02:21:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:21:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-17 02:21:25,137 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-17 02:21:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:25,137 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-17 02:21:25,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:25,138 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-17 02:21:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:25,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:25,139 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:25,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 02:21:25,352 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:25,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 4 times [2020-09-17 02:21:25,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:25,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126656165] [2020-09-17 02:21:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:25,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126656165] [2020-09-17 02:21:25,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590241733] [2020-09-17 02:21:25,460 INFO L93 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 [2020-09-17 02:21:25,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:25,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:25,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:25,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:25,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:25,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:25,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490331365] [2020-09-17 02:21:25,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:25,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:25,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:25,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:25,626 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-17 02:21:25,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:25,675 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-17 02:21:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:21:25,676 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:25,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:25,677 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:21:25,677 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:21:25,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:21:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-17 02:21:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 02:21:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-17 02:21:25,682 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-17 02:21:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:25,682 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-17 02:21:25,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-17 02:21:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:25,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:25,683 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:25,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-17 02:21:25,895 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:25,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:25,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 5 times [2020-09-17 02:21:25,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:25,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708123163] [2020-09-17 02:21:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:25,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708123163] [2020-09-17 02:21:25,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494192344] [2020-09-17 02:21:25,970 INFO L93 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 [2020-09-17 02:21:26,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:26,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:26,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:26,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:26,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:26,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765877660] [2020-09-17 02:21:26,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:26,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:26,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:26,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:26,090 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-17 02:21:26,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:26,160 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-17 02:21:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:21:26,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:26,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:26,162 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:21:26,162 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:21:26,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:21:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:21:26,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-17 02:21:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 02:21:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-17 02:21:26,166 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-17 02:21:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:26,167 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-17 02:21:26,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-17 02:21:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:26,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:26,168 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:26,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 02:21:26,378 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:26,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 6 times [2020-09-17 02:21:26,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:26,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734840492] [2020-09-17 02:21:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:26,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734840492] [2020-09-17 02:21:26,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650927519] [2020-09-17 02:21:26,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:26,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:26,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:26,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:26,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:26,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:26,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:26,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731331136] [2020-09-17 02:21:26,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:26,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:26,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:26,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:26,598 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-17 02:21:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:26,727 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-09-17 02:21:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:26,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:26,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:26,729 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:21:26,729 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:21:26,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:21:26,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:21:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2020-09-17 02:21:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:21:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-17 02:21:26,733 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-17 02:21:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:26,734 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-17 02:21:26,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-17 02:21:26,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:26,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:26,735 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:26,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:26,945 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:26,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:26,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 7 times [2020-09-17 02:21:26,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:26,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986329527] [2020-09-17 02:21:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:27,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986329527] [2020-09-17 02:21:27,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085039243] [2020-09-17 02:21:27,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:27,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:27,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:27,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:27,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049803346] [2020-09-17 02:21:27,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:27,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:27,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:27,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:27,239 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-17 02:21:27,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:27,313 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-17 02:21:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:21:27,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:27,316 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:21:27,316 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:21:27,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:21:27,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:21:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-17 02:21:27,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 02:21:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-17 02:21:27,320 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-17 02:21:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:27,321 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-17 02:21:27,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:27,321 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-17 02:21:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:27,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:27,322 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:27,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-09-17 02:21:27,522 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:27,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 8 times [2020-09-17 02:21:27,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:27,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286909561] [2020-09-17 02:21:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:27,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286909561] [2020-09-17 02:21:27,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251880204] [2020-09-17 02:21:27,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:27,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:27,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:27,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:27,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:27,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:27,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:27,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156538606] [2020-09-17 02:21:27,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:27,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:27,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:27,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:27,744 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-17 02:21:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:27,837 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-17 02:21:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:27,838 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:27,839 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:21:27,839 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:21:27,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:21:27,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-17 02:21:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:21:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-17 02:21:27,847 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-17 02:21:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:27,847 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-17 02:21:27,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-17 02:21:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:27,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:27,848 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:28,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:28,049 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 9 times [2020-09-17 02:21:28,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:28,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448727142] [2020-09-17 02:21:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:28,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448727142] [2020-09-17 02:21:28,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208930669] [2020-09-17 02:21:28,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:28,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:28,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:28,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:28,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:28,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:28,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89204659] [2020-09-17 02:21:28,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:28,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:28,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:28,260 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-17 02:21:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:28,346 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-17 02:21:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:28,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:28,347 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:21:28,347 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:21:28,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:21:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-17 02:21:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 02:21:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-17 02:21:28,352 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-17 02:21:28,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:28,352 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-17 02:21:28,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-17 02:21:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:28,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:28,353 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:28,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-17 02:21:28,554 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:28,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:28,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 10 times [2020-09-17 02:21:28,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:28,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179791856] [2020-09-17 02:21:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:28,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179791856] [2020-09-17 02:21:28,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921847400] [2020-09-17 02:21:28,624 INFO L93 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:28,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:28,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:28,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:28,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:28,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:28,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:28,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:28,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642446584] [2020-09-17 02:21:28,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:28,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:28,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:28,810 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-17 02:21:29,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:29,048 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-17 02:21:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:29,049 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:29,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:29,050 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:21:29,050 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:21:29,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:21:29,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:21:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-17 02:21:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 02:21:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-17 02:21:29,056 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-17 02:21:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:29,056 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-17 02:21:29,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-17 02:21:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:29,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:29,057 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:29,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:29,270 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:29,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 11 times [2020-09-17 02:21:29,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:29,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690791883] [2020-09-17 02:21:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:29,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690791883] [2020-09-17 02:21:29,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006202993] [2020-09-17 02:21:29,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:29,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:29,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:29,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:29,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:29,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955903624] [2020-09-17 02:21:29,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:29,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:29,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:29,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:29,476 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-17 02:21:29,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:29,607 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-17 02:21:29,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:29,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:29,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:29,610 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:21:29,610 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:21:29,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:21:29,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-17 02:21:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:21:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-17 02:21:29,615 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-17 02:21:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:29,615 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-17 02:21:29,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:29,615 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-17 02:21:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:29,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:29,616 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:29,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 02:21:29,828 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 12 times [2020-09-17 02:21:29,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:29,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51778136] [2020-09-17 02:21:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:29,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51778136] [2020-09-17 02:21:29,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314397489] [2020-09-17 02:21:29,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:29,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:29,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:29,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:29,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:30,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:30,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:30,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:30,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245799372] [2020-09-17 02:21:30,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:30,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:30,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:30,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:30,015 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-17 02:21:30,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:30,279 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-17 02:21:30,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:21:30,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:30,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:30,282 INFO L225 Difference]: With dead ends: 141 [2020-09-17 02:21:30,282 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 02:21:30,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:21:30,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 02:21:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-17 02:21:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:21:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-17 02:21:30,288 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-17 02:21:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:30,288 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-17 02:21:30,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-17 02:21:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:30,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:30,289 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:30,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-17 02:21:30,501 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 13 times [2020-09-17 02:21:30,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:30,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374200946] [2020-09-17 02:21:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:30,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374200946] [2020-09-17 02:21:30,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412599112] [2020-09-17 02:21:30,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:30,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:30,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:30,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:30,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:30,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348601514] [2020-09-17 02:21:30,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:30,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:30,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:30,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:30,729 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-17 02:21:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:30,949 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-17 02:21:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:30,949 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:30,950 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:21:30,950 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:21:30,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:21:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:21:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-17 02:21:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 02:21:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-17 02:21:30,957 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-17 02:21:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:30,958 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-17 02:21:30,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-17 02:21:30,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:30,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:30,959 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:31,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 02:21:31,170 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:31,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 14 times [2020-09-17 02:21:31,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:31,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355005751] [2020-09-17 02:21:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:31,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355005751] [2020-09-17 02:21:31,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098939197] [2020-09-17 02:21:31,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:31,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:31,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:31,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:31,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:31,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:31,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:31,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498042096] [2020-09-17 02:21:31,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:31,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:31,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:31,363 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-17 02:21:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:31,520 INFO L93 Difference]: Finished difference Result 128 states and 297 transitions. [2020-09-17 02:21:31,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:31,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:31,521 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:21:31,521 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 02:21:31,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 02:21:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-09-17 02:21:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:21:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-17 02:21:31,526 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-17 02:21:31,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:31,526 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-17 02:21:31,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-17 02:21:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:31,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:31,527 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:31,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-17 02:21:31,736 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 15 times [2020-09-17 02:21:31,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:31,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128709700] [2020-09-17 02:21:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:31,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128709700] [2020-09-17 02:21:31,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886000297] [2020-09-17 02:21:31,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:31,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:31,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:31,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:31,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:31,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:31,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353472714] [2020-09-17 02:21:31,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:31,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:31,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:31,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:31,948 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-17 02:21:32,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:32,203 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-09-17 02:21:32,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:21:32,204 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:32,205 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:21:32,205 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:21:32,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:21:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:21:32,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2020-09-17 02:21:32,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 02:21:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-17 02:21:32,211 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-17 02:21:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:32,211 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-17 02:21:32,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-17 02:21:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:32,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:32,212 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:32,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-17 02:21:32,424 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:32,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:32,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 16 times [2020-09-17 02:21:32,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:32,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925735470] [2020-09-17 02:21:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:32,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925735470] [2020-09-17 02:21:32,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139371161] [2020-09-17 02:21:32,503 INFO L93 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:32,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:32,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:32,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:32,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:32,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:32,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:32,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527489177] [2020-09-17 02:21:32,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:32,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:32,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:32,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:32,643 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-17 02:21:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:32,945 INFO L93 Difference]: Finished difference Result 136 states and 323 transitions. [2020-09-17 02:21:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:21:32,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:32,948 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:21:32,948 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:21:32,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:21:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:21:32,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-17 02:21:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 02:21:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-17 02:21:32,953 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-17 02:21:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:32,954 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-17 02:21:32,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-17 02:21:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:32,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:32,955 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:33,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:33,166 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:33,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 17 times [2020-09-17 02:21:33,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:33,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082658953] [2020-09-17 02:21:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:33,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082658953] [2020-09-17 02:21:33,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538025935] [2020-09-17 02:21:33,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:33,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:33,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:33,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:33,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:33,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:33,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:33,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:33,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955099510] [2020-09-17 02:21:33,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:33,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:33,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:33,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:33,389 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-17 02:21:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:33,768 INFO L93 Difference]: Finished difference Result 138 states and 325 transitions. [2020-09-17 02:21:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:21:33,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:33,770 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:21:33,770 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:21:33,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:21:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:21:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2020-09-17 02:21:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:21:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-17 02:21:33,776 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-17 02:21:33,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:33,776 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-17 02:21:33,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-17 02:21:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:33,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:33,777 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:33,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:33,978 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:33,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:33,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 18 times [2020-09-17 02:21:33,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:33,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458059289] [2020-09-17 02:21:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:34,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458059289] [2020-09-17 02:21:34,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122416023] [2020-09-17 02:21:34,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:34,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:34,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:34,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:21:34,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:34,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:34,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:34,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-17 02:21:34,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547573026] [2020-09-17 02:21:34,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:21:34,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:34,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:21:34,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:21:34,159 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-17 02:21:34,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:34,454 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-17 02:21:34,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:21:34,454 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-17 02:21:34,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:34,456 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:21:34,456 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:21:34,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:21:34,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:21:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2020-09-17 02:21:34,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:21:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-17 02:21:34,462 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-17 02:21:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:34,462 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-17 02:21:34,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:21:34,462 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-17 02:21:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:34,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:34,463 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:34,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:34,675 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:34,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-17 02:21:34,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:34,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081126245] [2020-09-17 02:21:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:34,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081126245] [2020-09-17 02:21:34,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998313813] [2020-09-17 02:21:34,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:34,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:34,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:34,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:34,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:34,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:34,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-17 02:21:34,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92988423] [2020-09-17 02:21:34,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:21:34,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:21:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:21:34,970 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-17 02:21:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:35,114 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-17 02:21:35,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:35,114 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-17 02:21:35,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:35,115 INFO L225 Difference]: With dead ends: 143 [2020-09-17 02:21:35,116 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:21:35,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:21:35,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:21:35,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-17 02:21:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:21:35,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-17 02:21:35,121 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-17 02:21:35,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:35,121 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-17 02:21:35,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:21:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-17 02:21:35,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:35,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:35,122 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:35,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-17 02:21:35,332 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:35,333 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-17 02:21:35,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:35,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748190974] [2020-09-17 02:21:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:35,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748190974] [2020-09-17 02:21:35,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035990423] [2020-09-17 02:21:35,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:35,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:35,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:35,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:35,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:35,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:35,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:35,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035991198] [2020-09-17 02:21:35,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:35,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:35,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:35,582 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-17 02:21:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:35,704 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-17 02:21:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:35,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-17 02:21:35,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:35,705 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:21:35,706 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:21:35,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:21:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:21:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2020-09-17 02:21:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 02:21:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-17 02:21:35,711 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-17 02:21:35,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:35,713 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-17 02:21:35,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-17 02:21:35,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:35,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:35,714 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:35,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:35,923 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:35,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:35,924 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-17 02:21:35,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:35,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201872392] [2020-09-17 02:21:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:36,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201872392] [2020-09-17 02:21:36,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795027881] [2020-09-17 02:21:36,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:36,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:21:36,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:36,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:36,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:36,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:36,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:36,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976183510] [2020-09-17 02:21:36,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:36,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:36,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:36,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:36,191 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-17 02:21:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:36,390 INFO L93 Difference]: Finished difference Result 145 states and 336 transitions. [2020-09-17 02:21:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:36,391 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-17 02:21:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:36,392 INFO L225 Difference]: With dead ends: 145 [2020-09-17 02:21:36,393 INFO L226 Difference]: Without dead ends: 142 [2020-09-17 02:21:36,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:21:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-17 02:21:36,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2020-09-17 02:21:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 02:21:36,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-17 02:21:36,397 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-17 02:21:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:36,397 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-17 02:21:36,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:36,398 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-17 02:21:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:36,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:36,398 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:36,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-17 02:21:36,609 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:36,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:36,610 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-17 02:21:36,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:36,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834202208] [2020-09-17 02:21:36,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:36,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834202208] [2020-09-17 02:21:36,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153633630] [2020-09-17 02:21:36,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:36,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:21:36,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:36,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:36,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:36,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:36,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90500549] [2020-09-17 02:21:36,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:36,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:36,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:36,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:36,860 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-17 02:21:37,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:37,119 INFO L93 Difference]: Finished difference Result 147 states and 342 transitions. [2020-09-17 02:21:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:21:37,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-17 02:21:37,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:37,121 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:21:37,121 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 02:21:37,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:21:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 02:21:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-09-17 02:21:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-17 02:21:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-17 02:21:37,126 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-17 02:21:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:37,126 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-17 02:21:37,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-17 02:21:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:37,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:37,129 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:37,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:37,338 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:37,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:37,339 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-17 02:21:37,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:37,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149652657] [2020-09-17 02:21:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:37,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149652657] [2020-09-17 02:21:37,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333333684] [2020-09-17 02:21:37,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:37,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:37,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:37,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:37,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:37,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275182215] [2020-09-17 02:21:37,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:37,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:37,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:37,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:37,588 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-17 02:21:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:37,806 INFO L93 Difference]: Finished difference Result 143 states and 336 transitions. [2020-09-17 02:21:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:21:37,807 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-17 02:21:37,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:37,808 INFO L225 Difference]: With dead ends: 143 [2020-09-17 02:21:37,808 INFO L226 Difference]: Without dead ends: 140 [2020-09-17 02:21:37,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:21:37,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-17 02:21:37,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-09-17 02:21:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-17 02:21:37,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-17 02:21:37,815 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-17 02:21:37,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:37,816 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-17 02:21:37,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:37,816 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-17 02:21:37,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:21:37,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:37,817 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:38,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-17 02:21:38,028 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:38,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:38,029 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-17 02:21:38,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:38,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603640057] [2020-09-17 02:21:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:38,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603640057] [2020-09-17 02:21:38,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485569612] [2020-09-17 02:21:38,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:38,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:38,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:38,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:38,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:38,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:38,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:38,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:38,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089675074] [2020-09-17 02:21:38,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:38,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:38,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:38,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:38,254 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-17 02:21:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:38,548 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-17 02:21:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:38,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-17 02:21:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:38,549 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:21:38,549 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 02:21:38,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:21:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 02:21:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-17 02:21:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-17 02:21:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-17 02:21:38,554 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-17 02:21:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:38,554 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-17 02:21:38,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:38,554 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-17 02:21:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:38,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:38,557 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:38,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:38,768 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:38,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:38,768 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 19 times [2020-09-17 02:21:38,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:38,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165837104] [2020-09-17 02:21:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:38,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165837104] [2020-09-17 02:21:38,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316006644] [2020-09-17 02:21:38,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:38,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:38,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:39,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:39,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:39,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718525533] [2020-09-17 02:21:39,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:39,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:39,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:39,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:39,043 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-17 02:21:39,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:39,113 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-17 02:21:39,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:21:39,113 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:39,115 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:21:39,115 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 02:21:39,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 02:21:39,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-17 02:21:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-17 02:21:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-17 02:21:39,119 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-17 02:21:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:39,119 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-17 02:21:39,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:39,119 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-17 02:21:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:39,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:39,120 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:39,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-17 02:21:39,328 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:39,328 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 20 times [2020-09-17 02:21:39,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:39,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984379780] [2020-09-17 02:21:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:39,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984379780] [2020-09-17 02:21:39,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371001425] [2020-09-17 02:21:39,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:39,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:39,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:39,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:39,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:39,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:39,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:39,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403042909] [2020-09-17 02:21:39,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:39,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:39,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:39,592 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-17 02:21:39,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:39,678 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-17 02:21:39,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:39,678 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:39,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:39,680 INFO L225 Difference]: With dead ends: 145 [2020-09-17 02:21:39,680 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 02:21:39,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:21:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 02:21:39,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-17 02:21:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-17 02:21:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-17 02:21:39,684 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-17 02:21:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:39,684 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-17 02:21:39,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-17 02:21:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:39,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:39,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:39,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-17 02:21:39,895 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:39,896 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 21 times [2020-09-17 02:21:39,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:39,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762129432] [2020-09-17 02:21:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:39,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762129432] [2020-09-17 02:21:39,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252245563] [2020-09-17 02:21:39,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:40,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:40,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:40,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:40,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:40,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014891580] [2020-09-17 02:21:40,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:40,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:40,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:40,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:40,153 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-17 02:21:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:40,289 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-17 02:21:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:40,289 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:40,291 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:21:40,291 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:21:40,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:21:40,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-17 02:21:40,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-17 02:21:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-17 02:21:40,295 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-17 02:21:40,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:40,295 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-17 02:21:40,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-17 02:21:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:40,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:40,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:40,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-17 02:21:40,508 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:40,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:40,509 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 22 times [2020-09-17 02:21:40,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:40,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698283686] [2020-09-17 02:21:40,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:40,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698283686] [2020-09-17 02:21:40,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666169598] [2020-09-17 02:21:40,588 INFO L93 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:40,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:40,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:40,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:40,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:40,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:40,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:40,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527394214] [2020-09-17 02:21:40,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:40,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:40,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:40,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:40,760 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-17 02:21:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:40,959 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-17 02:21:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:21:40,960 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:40,961 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:21:40,961 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:21:40,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:21:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:21:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2020-09-17 02:21:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-17 02:21:40,965 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-17 02:21:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:40,965 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-17 02:21:40,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-17 02:21:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:40,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:40,966 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:41,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-17 02:21:41,173 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:41,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:41,174 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 23 times [2020-09-17 02:21:41,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:41,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967009851] [2020-09-17 02:21:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:41,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967009851] [2020-09-17 02:21:41,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465739489] [2020-09-17 02:21:41,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:41,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:41,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:41,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:41,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:41,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:41,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:41,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327192638] [2020-09-17 02:21:41,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:41,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:41,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:41,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:41,409 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-17 02:21:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:41,589 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-09-17 02:21:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:21:41,589 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:41,591 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:21:41,591 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 02:21:41,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:21:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 02:21:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2020-09-17 02:21:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 02:21:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-17 02:21:41,597 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-17 02:21:41,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:41,597 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-17 02:21:41,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-17 02:21:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:41,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:41,598 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:41,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:41,803 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:41,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 24 times [2020-09-17 02:21:41,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:41,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302683821] [2020-09-17 02:21:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:41,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302683821] [2020-09-17 02:21:41,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96652374] [2020-09-17 02:21:41,931 INFO L93 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 [2020-09-17 02:21:42,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:42,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:42,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:42,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:42,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:42,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:42,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603611378] [2020-09-17 02:21:42,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:42,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:42,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:42,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:42,122 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-17 02:21:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:42,198 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-17 02:21:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:21:42,199 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:42,200 INFO L225 Difference]: With dead ends: 152 [2020-09-17 02:21:42,200 INFO L226 Difference]: Without dead ends: 150 [2020-09-17 02:21:42,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:21:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-17 02:21:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-17 02:21:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-17 02:21:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-17 02:21:42,205 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-17 02:21:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:42,208 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-17 02:21:42,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-17 02:21:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:42,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:42,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:42,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-09-17 02:21:42,419 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:42,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 25 times [2020-09-17 02:21:42,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:42,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302896784] [2020-09-17 02:21:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:42,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302896784] [2020-09-17 02:21:42,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639609589] [2020-09-17 02:21:42,532 INFO L93 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 [2020-09-17 02:21:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:42,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:42,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:42,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:42,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:42,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202846714] [2020-09-17 02:21:42,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:42,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:42,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:42,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:42,699 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-17 02:21:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:42,799 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-17 02:21:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:42,799 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:42,801 INFO L225 Difference]: With dead ends: 153 [2020-09-17 02:21:42,801 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 02:21:42,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:21:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 02:21:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-17 02:21:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-17 02:21:42,806 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-17 02:21:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:42,807 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-17 02:21:42,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:42,807 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-17 02:21:42,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:42,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:42,807 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:43,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-17 02:21:43,018 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:43,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 26 times [2020-09-17 02:21:43,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:43,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800996292] [2020-09-17 02:21:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:43,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800996292] [2020-09-17 02:21:43,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175247664] [2020-09-17 02:21:43,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:21:43,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:43,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:43,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:43,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:43,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:43,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:43,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653889584] [2020-09-17 02:21:43,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:43,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:43,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:43,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:43,282 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-17 02:21:43,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:43,436 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-17 02:21:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:43,437 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:43,438 INFO L225 Difference]: With dead ends: 156 [2020-09-17 02:21:43,439 INFO L226 Difference]: Without dead ends: 154 [2020-09-17 02:21:43,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:21:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-17 02:21:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-17 02:21:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-17 02:21:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-17 02:21:43,442 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-17 02:21:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:43,443 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-17 02:21:43,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-17 02:21:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:43,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:43,444 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:43,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:43,653 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:43,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 27 times [2020-09-17 02:21:43,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:43,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665209763] [2020-09-17 02:21:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:43,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665209763] [2020-09-17 02:21:43,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987313242] [2020-09-17 02:21:43,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:43,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:43,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:43,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:43,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:43,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:43,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:43,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244734116] [2020-09-17 02:21:43,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:43,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:43,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:43,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:43,917 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-17 02:21:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:44,009 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-17 02:21:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:21:44,010 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:44,011 INFO L225 Difference]: With dead ends: 148 [2020-09-17 02:21:44,011 INFO L226 Difference]: Without dead ends: 146 [2020-09-17 02:21:44,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:21:44,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-17 02:21:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-17 02:21:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 02:21:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-17 02:21:44,016 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-17 02:21:44,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:44,016 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-17 02:21:44,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-17 02:21:44,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:44,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:44,017 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:44,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-17 02:21:44,227 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:44,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 28 times [2020-09-17 02:21:44,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:44,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671358655] [2020-09-17 02:21:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:44,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671358655] [2020-09-17 02:21:44,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474902413] [2020-09-17 02:21:44,310 INFO L93 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:44,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:44,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:44,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:44,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:44,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:44,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:44,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810883905] [2020-09-17 02:21:44,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:44,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:44,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:44,504 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-17 02:21:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:44,633 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2020-09-17 02:21:44,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:44,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:44,635 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:21:44,635 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 02:21:44,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 02:21:44,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2020-09-17 02:21:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-17 02:21:44,640 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-17 02:21:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:44,640 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-17 02:21:44,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-17 02:21:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:44,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:44,641 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:44,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:44,844 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:44,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 29 times [2020-09-17 02:21:44,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:44,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964406569] [2020-09-17 02:21:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:44,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964406569] [2020-09-17 02:21:44,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221834216] [2020-09-17 02:21:44,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:21:44,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:44,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:44,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:45,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:45,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:45,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697508489] [2020-09-17 02:21:45,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:45,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:45,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:45,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:45,108 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-09-17 02:21:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:45,237 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-17 02:21:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:21:45,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:45,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:45,238 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:21:45,239 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 02:21:45,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:21:45,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 02:21:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-17 02:21:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-17 02:21:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-17 02:21:45,243 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-17 02:21:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:45,243 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-17 02:21:45,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-17 02:21:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:45,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:45,244 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:45,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-17 02:21:45,455 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 30 times [2020-09-17 02:21:45,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:45,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265990427] [2020-09-17 02:21:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:45,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265990427] [2020-09-17 02:21:45,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688438597] [2020-09-17 02:21:45,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:45,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:45,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:45,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:45,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:45,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:45,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:45,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:45,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334217079] [2020-09-17 02:21:45,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:45,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:45,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:45,713 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-17 02:21:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:46,061 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-17 02:21:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:46,062 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:46,063 INFO L225 Difference]: With dead ends: 164 [2020-09-17 02:21:46,063 INFO L226 Difference]: Without dead ends: 159 [2020-09-17 02:21:46,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:21:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-17 02:21:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-17 02:21:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-17 02:21:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-17 02:21:46,068 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-17 02:21:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:46,069 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-17 02:21:46,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:46,069 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-17 02:21:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:46,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:46,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:46,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-17 02:21:46,281 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:46,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:46,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 31 times [2020-09-17 02:21:46,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:46,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278870514] [2020-09-17 02:21:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:46,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278870514] [2020-09-17 02:21:46,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260298412] [2020-09-17 02:21:46,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:46,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:46,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:46,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:46,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:46,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424573685] [2020-09-17 02:21:46,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:46,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:46,548 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-17 02:21:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:46,760 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-17 02:21:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:21:46,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:46,762 INFO L225 Difference]: With dead ends: 156 [2020-09-17 02:21:46,762 INFO L226 Difference]: Without dead ends: 154 [2020-09-17 02:21:46,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:21:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-17 02:21:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-17 02:21:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-17 02:21:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-17 02:21:46,765 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-17 02:21:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:46,765 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-17 02:21:46,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-17 02:21:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:46,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:46,766 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:46,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-17 02:21:46,967 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:46,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:46,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 32 times [2020-09-17 02:21:46,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:46,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948289095] [2020-09-17 02:21:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:47,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948289095] [2020-09-17 02:21:47,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271545493] [2020-09-17 02:21:47,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:21:47,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:47,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:47,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:47,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:47,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:47,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:47,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:47,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451809848] [2020-09-17 02:21:47,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:47,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:47,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:47,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:47,263 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-17 02:21:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:47,693 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-17 02:21:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:21:47,694 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:47,695 INFO L225 Difference]: With dead ends: 176 [2020-09-17 02:21:47,696 INFO L226 Difference]: Without dead ends: 171 [2020-09-17 02:21:47,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:21:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-17 02:21:47,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-17 02:21:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-17 02:21:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-17 02:21:47,700 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-17 02:21:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:47,700 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-17 02:21:47,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-17 02:21:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:47,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:47,701 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:47,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-17 02:21:47,902 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:47,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 33 times [2020-09-17 02:21:47,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:47,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453390206] [2020-09-17 02:21:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:47,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453390206] [2020-09-17 02:21:47,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560531955] [2020-09-17 02:21:47,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:48,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:21:48,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:48,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:48,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:48,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:48,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:48,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:48,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072482226] [2020-09-17 02:21:48,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:48,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:48,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:48,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:48,167 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-17 02:21:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:48,499 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-17 02:21:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:48,500 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:48,501 INFO L225 Difference]: With dead ends: 166 [2020-09-17 02:21:48,502 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 02:21:48,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:21:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 02:21:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-17 02:21:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 02:21:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-17 02:21:48,508 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-17 02:21:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:48,508 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-17 02:21:48,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-17 02:21:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:48,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:48,509 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:48,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:48,721 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 34 times [2020-09-17 02:21:48,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:48,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469435901] [2020-09-17 02:21:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:48,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469435901] [2020-09-17 02:21:48,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195640527] [2020-09-17 02:21:48,812 INFO L93 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:48,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:48,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:48,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:48,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:48,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:48,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:48,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572615787] [2020-09-17 02:21:48,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:48,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:48,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:48,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:48,980 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-17 02:21:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:49,207 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-17 02:21:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:21:49,207 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:49,209 INFO L225 Difference]: With dead ends: 163 [2020-09-17 02:21:49,209 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 02:21:49,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:21:49,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 02:21:49,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-17 02:21:49,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-17 02:21:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-17 02:21:49,213 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-17 02:21:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:49,214 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-17 02:21:49,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-17 02:21:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:49,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:49,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:49,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-09-17 02:21:49,425 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:49,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 35 times [2020-09-17 02:21:49,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:49,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867406043] [2020-09-17 02:21:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:49,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867406043] [2020-09-17 02:21:49,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63072684] [2020-09-17 02:21:49,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:21:49,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:49,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:49,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:49,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:49,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:49,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:49,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047330645] [2020-09-17 02:21:49,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:49,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:49,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:49,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:49,681 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-17 02:21:50,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:50,008 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-17 02:21:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:21:50,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:50,010 INFO L225 Difference]: With dead ends: 170 [2020-09-17 02:21:50,010 INFO L226 Difference]: Without dead ends: 168 [2020-09-17 02:21:50,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:21:50,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-17 02:21:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-17 02:21:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-17 02:21:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-17 02:21:50,015 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-17 02:21:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:50,015 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-17 02:21:50,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-17 02:21:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:50,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:50,016 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:50,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:50,225 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:50,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 36 times [2020-09-17 02:21:50,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:50,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020651071] [2020-09-17 02:21:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:50,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020651071] [2020-09-17 02:21:50,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936003732] [2020-09-17 02:21:50,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:50,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:50,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:50,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:50,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:50,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:50,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:50,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:50,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736779878] [2020-09-17 02:21:50,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:50,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:50,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:50,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:50,478 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-17 02:21:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:50,868 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-17 02:21:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:21:50,869 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:50,870 INFO L225 Difference]: With dead ends: 177 [2020-09-17 02:21:50,870 INFO L226 Difference]: Without dead ends: 172 [2020-09-17 02:21:50,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:21:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-17 02:21:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-17 02:21:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-17 02:21:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-17 02:21:50,875 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-17 02:21:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:50,876 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-17 02:21:50,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-17 02:21:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:50,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:50,877 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:51,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-09-17 02:21:51,088 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:51,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 37 times [2020-09-17 02:21:51,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:51,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622134251] [2020-09-17 02:21:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:51,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622134251] [2020-09-17 02:21:51,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751636562] [2020-09-17 02:21:51,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:51,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:51,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:51,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:51,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:51,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:51,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163463066] [2020-09-17 02:21:51,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:51,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:51,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:51,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:51,320 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-17 02:21:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:51,810 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-17 02:21:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:21:51,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:51,812 INFO L225 Difference]: With dead ends: 190 [2020-09-17 02:21:51,813 INFO L226 Difference]: Without dead ends: 182 [2020-09-17 02:21:51,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:21:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-17 02:21:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-17 02:21:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 02:21:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-17 02:21:51,816 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-17 02:21:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:51,817 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-17 02:21:51,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-17 02:21:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:51,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:51,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:52,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-17 02:21:52,018 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:52,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 38 times [2020-09-17 02:21:52,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:52,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897537904] [2020-09-17 02:21:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:52,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897537904] [2020-09-17 02:21:52,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626299425] [2020-09-17 02:21:52,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:21:52,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:52,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:52,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:52,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:52,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:52,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:52,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:52,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644655338] [2020-09-17 02:21:52,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:52,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:52,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:52,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:52,251 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-17 02:21:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:52,721 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-17 02:21:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:21:52,721 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:52,723 INFO L225 Difference]: With dead ends: 180 [2020-09-17 02:21:52,723 INFO L226 Difference]: Without dead ends: 175 [2020-09-17 02:21:52,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:21:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-17 02:21:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-17 02:21:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-17 02:21:52,728 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-17 02:21:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:52,728 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-17 02:21:52,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-17 02:21:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:52,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:52,729 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:52,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:52,939 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:52,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:52,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 39 times [2020-09-17 02:21:52,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:52,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336772858] [2020-09-17 02:21:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:53,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336772858] [2020-09-17 02:21:53,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688673475] [2020-09-17 02:21:53,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:53,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:21:53,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:53,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:53,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:53,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:53,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:53,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548777858] [2020-09-17 02:21:53,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:53,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:53,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:53,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:53,186 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-17 02:21:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:53,433 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-17 02:21:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:21:53,434 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:53,436 INFO L225 Difference]: With dead ends: 164 [2020-09-17 02:21:53,436 INFO L226 Difference]: Without dead ends: 162 [2020-09-17 02:21:53,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:21:53,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-17 02:21:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-17 02:21:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 02:21:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-17 02:21:53,440 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-17 02:21:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:53,440 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-17 02:21:53,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-17 02:21:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:53,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:53,441 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:53,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-17 02:21:53,642 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:53,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:53,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 40 times [2020-09-17 02:21:53,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:53,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722816283] [2020-09-17 02:21:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:53,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722816283] [2020-09-17 02:21:53,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172622370] [2020-09-17 02:21:53,723 INFO L93 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:53,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:53,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:53,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:53,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:53,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:53,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:53,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306547546] [2020-09-17 02:21:53,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:53,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:53,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:53,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:53,871 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-17 02:21:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:54,120 INFO L93 Difference]: Finished difference Result 159 states and 368 transitions. [2020-09-17 02:21:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:21:54,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:54,122 INFO L225 Difference]: With dead ends: 159 [2020-09-17 02:21:54,123 INFO L226 Difference]: Without dead ends: 157 [2020-09-17 02:21:54,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:21:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-17 02:21:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2020-09-17 02:21:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 02:21:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-17 02:21:54,127 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-17 02:21:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:54,127 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-17 02:21:54,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-17 02:21:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:54,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:54,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:54,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-17 02:21:54,338 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:54,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 41 times [2020-09-17 02:21:54,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:54,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740577863] [2020-09-17 02:21:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:54,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740577863] [2020-09-17 02:21:54,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513861457] [2020-09-17 02:21:54,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:21:54,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:21:54,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:54,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:54,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:54,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:54,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:54,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934674517] [2020-09-17 02:21:54,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:54,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:54,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:54,565 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-17 02:21:55,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:55,008 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2020-09-17 02:21:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:21:55,009 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:55,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:55,011 INFO L225 Difference]: With dead ends: 175 [2020-09-17 02:21:55,011 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 02:21:55,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:21:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 02:21:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2020-09-17 02:21:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 02:21:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-17 02:21:55,015 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-17 02:21:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:55,015 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-17 02:21:55,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-17 02:21:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:55,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:55,016 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:55,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-17 02:21:55,217 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:55,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 42 times [2020-09-17 02:21:55,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:55,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474920522] [2020-09-17 02:21:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:55,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474920522] [2020-09-17 02:21:55,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655554371] [2020-09-17 02:21:55,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:55,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:21:55,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:55,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:55,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:55,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:55,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:55,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073501316] [2020-09-17 02:21:55,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:55,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:55,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:55,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:55,454 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-17 02:21:55,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:55,842 INFO L93 Difference]: Finished difference Result 162 states and 374 transitions. [2020-09-17 02:21:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:21:55,842 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:55,844 INFO L225 Difference]: With dead ends: 162 [2020-09-17 02:21:55,844 INFO L226 Difference]: Without dead ends: 160 [2020-09-17 02:21:55,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:21:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-17 02:21:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 118. [2020-09-17 02:21:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 02:21:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-17 02:21:55,848 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-17 02:21:55,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:55,848 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-17 02:21:55,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:55,848 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-17 02:21:55,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:55,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:55,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:56,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:56,060 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 43 times [2020-09-17 02:21:56,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:56,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767645477] [2020-09-17 02:21:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:56,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767645477] [2020-09-17 02:21:56,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014606436] [2020-09-17 02:21:56,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:56,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:56,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:56,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:56,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:56,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663326766] [2020-09-17 02:21:56,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:56,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:56,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:56,316 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-17 02:21:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:56,818 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-17 02:21:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:21:56,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:56,820 INFO L225 Difference]: With dead ends: 171 [2020-09-17 02:21:56,821 INFO L226 Difference]: Without dead ends: 169 [2020-09-17 02:21:56,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:21:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-17 02:21:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 120. [2020-09-17 02:21:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-17 02:21:56,825 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-17 02:21:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:56,826 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-17 02:21:56,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:56,826 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-17 02:21:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:56,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:56,827 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:57,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:57,038 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:57,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 44 times [2020-09-17 02:21:57,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:57,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397906473] [2020-09-17 02:21:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:57,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397906473] [2020-09-17 02:21:57,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489388490] [2020-09-17 02:21:57,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:21:57,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:21:57,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:57,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:57,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:57,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:21:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:57,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:57,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:57,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441484409] [2020-09-17 02:21:57,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:57,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:57,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:57,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:57,293 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-17 02:21:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:57,763 INFO L93 Difference]: Finished difference Result 165 states and 396 transitions. [2020-09-17 02:21:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:21:57,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:57,765 INFO L225 Difference]: With dead ends: 165 [2020-09-17 02:21:57,766 INFO L226 Difference]: Without dead ends: 160 [2020-09-17 02:21:57,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:21:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-17 02:21:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2020-09-17 02:21:57,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 02:21:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-17 02:21:57,770 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-17 02:21:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:57,770 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-17 02:21:57,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-17 02:21:57,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:57,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:57,771 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:57,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:57,972 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:57,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 45 times [2020-09-17 02:21:57,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:57,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499426000] [2020-09-17 02:21:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:58,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499426000] [2020-09-17 02:21:58,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37569152] [2020-09-17 02:21:58,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:58,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:21:58,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:58,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:21:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:58,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:58,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:58,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416240585] [2020-09-17 02:21:58,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:58,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:58,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:58,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:58,266 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-17 02:21:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:58,937 INFO L93 Difference]: Finished difference Result 194 states and 461 transitions. [2020-09-17 02:21:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:21:58,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:58,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:58,939 INFO L225 Difference]: With dead ends: 194 [2020-09-17 02:21:58,939 INFO L226 Difference]: Without dead ends: 186 [2020-09-17 02:21:58,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:21:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-17 02:21:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 118. [2020-09-17 02:21:58,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 02:21:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-17 02:21:58,945 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-17 02:21:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:58,945 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-17 02:21:58,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-17 02:21:58,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:58,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:58,946 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:21:59,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:59,150 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:21:59,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:21:59,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 46 times [2020-09-17 02:21:59,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:21:59,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558298042] [2020-09-17 02:21:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:21:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:21:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:59,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558298042] [2020-09-17 02:21:59,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674199757] [2020-09-17 02:21:59,236 INFO L93 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:21:59,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:21:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:21:59,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:21:59,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:21:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:21:59,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:21:59,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:21:59,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988825607] [2020-09-17 02:21:59,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:21:59,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:21:59,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:21:59,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:21:59,403 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-17 02:21:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:21:59,875 INFO L93 Difference]: Finished difference Result 168 states and 393 transitions. [2020-09-17 02:21:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:21:59,876 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:21:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:21:59,877 INFO L225 Difference]: With dead ends: 168 [2020-09-17 02:21:59,877 INFO L226 Difference]: Without dead ends: 166 [2020-09-17 02:21:59,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:21:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-17 02:21:59,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-17 02:21:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 02:21:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-17 02:21:59,880 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-17 02:21:59,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:21:59,880 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-17 02:21:59,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:21:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-17 02:21:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:21:59,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:21:59,881 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:00,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-17 02:22:00,086 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:00,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:00,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 47 times [2020-09-17 02:22:00,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:00,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514856238] [2020-09-17 02:22:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:00,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514856238] [2020-09-17 02:22:00,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679463783] [2020-09-17 02:22:00,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:22:00,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:00,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:00,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:22:00,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:00,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:00,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:00,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:22:00,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94646210] [2020-09-17 02:22:00,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:22:00,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:00,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:22:00,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:22:00,325 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-17 02:22:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:00,928 INFO L93 Difference]: Finished difference Result 181 states and 430 transitions. [2020-09-17 02:22:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:22:00,929 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:22:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:00,930 INFO L225 Difference]: With dead ends: 181 [2020-09-17 02:22:00,930 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 02:22:00,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:22:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 02:22:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 119. [2020-09-17 02:22:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-17 02:22:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-17 02:22:00,934 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-17 02:22:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:00,934 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-17 02:22:00,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:22:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-17 02:22:00,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:00,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:00,935 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:01,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:01,145 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:01,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 48 times [2020-09-17 02:22:01,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:01,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923596138] [2020-09-17 02:22:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:01,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923596138] [2020-09-17 02:22:01,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576475333] [2020-09-17 02:22:01,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:01,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:22:01,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:01,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:22:01,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:01,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:01,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:01,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-17 02:22:01,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083913021] [2020-09-17 02:22:01,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:22:01,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:22:01,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:22:01,390 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-17 02:22:02,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:02,023 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-17 02:22:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:22:02,024 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-17 02:22:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:02,026 INFO L225 Difference]: With dead ends: 171 [2020-09-17 02:22:02,026 INFO L226 Difference]: Without dead ends: 166 [2020-09-17 02:22:02,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:22:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-17 02:22:02,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2020-09-17 02:22:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-17 02:22:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-17 02:22:02,030 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-17 02:22:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:02,030 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-17 02:22:02,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:22:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-17 02:22:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:02,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:02,031 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:02,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-17 02:22:02,231 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-17 02:22:02,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:02,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960623247] [2020-09-17 02:22:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:02,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960623247] [2020-09-17 02:22:02,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282408296] [2020-09-17 02:22:02,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:02,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:22:02,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:02,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:02,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:02,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:02,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:02,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-17 02:22:02,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856949207] [2020-09-17 02:22:02,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:22:02,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:02,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:22:02,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:22:02,569 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-17 02:22:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:02,750 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-17 02:22:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:02,751 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-17 02:22:02,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:02,752 INFO L225 Difference]: With dead ends: 164 [2020-09-17 02:22:02,752 INFO L226 Difference]: Without dead ends: 159 [2020-09-17 02:22:02,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:22:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-17 02:22:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-17 02:22:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-17 02:22:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-17 02:22:02,756 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-17 02:22:02,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:02,756 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-17 02:22:02,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:22:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-17 02:22:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:02,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:02,757 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:02,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:02,966 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:02,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-17 02:22:02,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:02,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079542719] [2020-09-17 02:22:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:03,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079542719] [2020-09-17 02:22:03,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912589478] [2020-09-17 02:22:03,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:03,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:22:03,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:03,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:03,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:03,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:03,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:03,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531505661] [2020-09-17 02:22:03,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:03,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:03,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:03,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:03,283 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-17 02:22:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:03,485 INFO L93 Difference]: Finished difference Result 158 states and 371 transitions. [2020-09-17 02:22:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:22:03,486 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:03,487 INFO L225 Difference]: With dead ends: 158 [2020-09-17 02:22:03,487 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 02:22:03,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:22:03,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 02:22:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-09-17 02:22:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-17 02:22:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-17 02:22:03,492 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-17 02:22:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:03,493 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-17 02:22:03,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-17 02:22:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:03,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:03,494 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:03,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-17 02:22:03,702 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:03,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-17 02:22:03,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:03,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325640992] [2020-09-17 02:22:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:03,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325640992] [2020-09-17 02:22:03,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493562362] [2020-09-17 02:22:03,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:03,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:03,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:03,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:03,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:04,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:04,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:04,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056901186] [2020-09-17 02:22:04,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:04,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:04,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:04,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:04,025 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-17 02:22:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:04,307 INFO L93 Difference]: Finished difference Result 172 states and 398 transitions. [2020-09-17 02:22:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:04,308 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:04,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:04,310 INFO L225 Difference]: With dead ends: 172 [2020-09-17 02:22:04,310 INFO L226 Difference]: Without dead ends: 169 [2020-09-17 02:22:04,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:22:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-17 02:22:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 129. [2020-09-17 02:22:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-17 02:22:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-17 02:22:04,316 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-17 02:22:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:04,316 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-17 02:22:04,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-17 02:22:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:04,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:04,318 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:04,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:04,528 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:04,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-17 02:22:04,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:04,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195252828] [2020-09-17 02:22:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:04,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195252828] [2020-09-17 02:22:04,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267932457] [2020-09-17 02:22:04,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:04,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:22:04,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:04,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:04,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:04,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:04,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:04,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248419779] [2020-09-17 02:22:04,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:04,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:04,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:04,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:04,838 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-17 02:22:05,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:05,177 INFO L93 Difference]: Finished difference Result 177 states and 410 transitions. [2020-09-17 02:22:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:22:05,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:05,179 INFO L225 Difference]: With dead ends: 177 [2020-09-17 02:22:05,179 INFO L226 Difference]: Without dead ends: 174 [2020-09-17 02:22:05,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:22:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-17 02:22:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 130. [2020-09-17 02:22:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-17 02:22:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-17 02:22:05,182 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-17 02:22:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:05,182 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-17 02:22:05,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-17 02:22:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:05,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:05,183 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:05,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:05,387 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-17 02:22:05,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:05,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074793296] [2020-09-17 02:22:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:05,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074793296] [2020-09-17 02:22:05,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739152851] [2020-09-17 02:22:05,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:05,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:22:05,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:05,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:05,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:05,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:05,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:05,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066253981] [2020-09-17 02:22:05,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:05,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:05,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:05,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:05,672 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-17 02:22:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:06,060 INFO L93 Difference]: Finished difference Result 176 states and 410 transitions. [2020-09-17 02:22:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:22:06,061 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:06,062 INFO L225 Difference]: With dead ends: 176 [2020-09-17 02:22:06,062 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 02:22:06,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:22:06,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 02:22:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 132. [2020-09-17 02:22:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-17 02:22:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-17 02:22:06,066 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-17 02:22:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:06,067 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-17 02:22:06,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-17 02:22:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:06,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:06,067 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:06,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-09-17 02:22:06,268 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-17 02:22:06,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:06,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716218517] [2020-09-17 02:22:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:06,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716218517] [2020-09-17 02:22:06,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191870637] [2020-09-17 02:22:06,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:06,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:06,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:06,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:06,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:06,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971097911] [2020-09-17 02:22:06,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:06,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:06,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:06,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:06,575 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-17 02:22:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:06,935 INFO L93 Difference]: Finished difference Result 169 states and 398 transitions. [2020-09-17 02:22:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:22:06,936 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:06,937 INFO L225 Difference]: With dead ends: 169 [2020-09-17 02:22:06,938 INFO L226 Difference]: Without dead ends: 166 [2020-09-17 02:22:06,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-17 02:22:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2020-09-17 02:22:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-17 02:22:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-17 02:22:06,943 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-17 02:22:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:06,944 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-17 02:22:06,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-17 02:22:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:22:06,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:06,945 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:07,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:07,146 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:07,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:07,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-17 02:22:07,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:07,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514327167] [2020-09-17 02:22:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:07,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514327167] [2020-09-17 02:22:07,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265447772] [2020-09-17 02:22:07,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:07,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:07,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:07,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:07,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:07,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:07,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:07,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:07,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102970834] [2020-09-17 02:22:07,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:07,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:07,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:07,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:07,427 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-17 02:22:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:07,809 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-17 02:22:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:07,810 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-17 02:22:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:07,811 INFO L225 Difference]: With dead ends: 176 [2020-09-17 02:22:07,812 INFO L226 Difference]: Without dead ends: 170 [2020-09-17 02:22:07,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:22:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-17 02:22:07,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-17 02:22:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-17 02:22:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-17 02:22:07,816 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-17 02:22:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:07,816 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-17 02:22:07,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-17 02:22:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:07,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:07,818 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:08,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:08,028 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:08,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:08,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 49 times [2020-09-17 02:22:08,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:08,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723079837] [2020-09-17 02:22:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:08,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723079837] [2020-09-17 02:22:08,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712547779] [2020-09-17 02:22:08,162 INFO L93 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 [2020-09-17 02:22:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:08,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:08,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:08,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:08,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:08,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744865926] [2020-09-17 02:22:08,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:08,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:08,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:08,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:08,376 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-17 02:22:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:08,426 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-17 02:22:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:22:08,426 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:08,428 INFO L225 Difference]: With dead ends: 163 [2020-09-17 02:22:08,428 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 02:22:08,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 02:22:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-17 02:22:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-17 02:22:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-17 02:22:08,431 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-17 02:22:08,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:08,432 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-17 02:22:08,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:08,432 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-17 02:22:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:08,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:08,433 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:08,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-17 02:22:08,642 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 50 times [2020-09-17 02:22:08,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:08,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531074820] [2020-09-17 02:22:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:08,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531074820] [2020-09-17 02:22:08,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591218285] [2020-09-17 02:22:08,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:22:08,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:08,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:08,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:08,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:09,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:09,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:09,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821190338] [2020-09-17 02:22:09,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:09,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:09,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:09,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:09,052 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-17 02:22:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:09,189 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-17 02:22:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:22:09,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:09,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:09,192 INFO L225 Difference]: With dead ends: 172 [2020-09-17 02:22:09,192 INFO L226 Difference]: Without dead ends: 170 [2020-09-17 02:22:09,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:22:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-17 02:22:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-17 02:22:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-17 02:22:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-17 02:22:09,197 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-17 02:22:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:09,198 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-17 02:22:09,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-17 02:22:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:09,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:09,199 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:09,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:09,411 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:09,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:09,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 51 times [2020-09-17 02:22:09,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:09,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313943858] [2020-09-17 02:22:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:09,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313943858] [2020-09-17 02:22:09,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057959187] [2020-09-17 02:22:09,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:09,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:22:09,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:09,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:10,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:10,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:10,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753652551] [2020-09-17 02:22:10,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:10,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:10,315 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-17 02:22:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:10,497 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-17 02:22:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:22:10,498 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:10,499 INFO L225 Difference]: With dead ends: 179 [2020-09-17 02:22:10,499 INFO L226 Difference]: Without dead ends: 177 [2020-09-17 02:22:10,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:22:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-17 02:22:10,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-17 02:22:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-17 02:22:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-17 02:22:10,504 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-17 02:22:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:10,504 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-17 02:22:10,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-17 02:22:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:10,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:10,505 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:10,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-17 02:22:10,716 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:10,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 52 times [2020-09-17 02:22:10,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:10,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201818281] [2020-09-17 02:22:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:10,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201818281] [2020-09-17 02:22:10,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671151491] [2020-09-17 02:22:10,828 INFO L93 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:10,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:10,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:10,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:10,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:11,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:11,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:11,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964294328] [2020-09-17 02:22:11,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:11,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:11,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:11,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:11,031 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-17 02:22:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:11,259 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-17 02:22:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:22:11,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:11,262 INFO L225 Difference]: With dead ends: 179 [2020-09-17 02:22:11,262 INFO L226 Difference]: Without dead ends: 177 [2020-09-17 02:22:11,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:22:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-17 02:22:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-17 02:22:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-17 02:22:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-17 02:22:11,267 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-17 02:22:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:11,268 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-17 02:22:11,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-17 02:22:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:11,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:11,269 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:11,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-17 02:22:11,471 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 53 times [2020-09-17 02:22:11,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:11,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642414591] [2020-09-17 02:22:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:11,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642414591] [2020-09-17 02:22:11,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257318964] [2020-09-17 02:22:11,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:22:11,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:11,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:11,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:11,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:11,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:11,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:11,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737750936] [2020-09-17 02:22:11,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:11,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:11,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:11,771 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-17 02:22:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:12,004 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-17 02:22:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:12,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:12,007 INFO L225 Difference]: With dead ends: 184 [2020-09-17 02:22:12,007 INFO L226 Difference]: Without dead ends: 182 [2020-09-17 02:22:12,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:22:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-17 02:22:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-17 02:22:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-17 02:22:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-17 02:22:12,011 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-17 02:22:12,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:12,011 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-17 02:22:12,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:12,011 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-17 02:22:12,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:12,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:12,012 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:12,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-17 02:22:12,217 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:12,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:12,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 54 times [2020-09-17 02:22:12,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:12,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546693982] [2020-09-17 02:22:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:12,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546693982] [2020-09-17 02:22:12,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717779863] [2020-09-17 02:22:12,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:12,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:22:12,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:12,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:12,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:12,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:12,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:12,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714128078] [2020-09-17 02:22:12,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:12,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:12,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:12,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:12,528 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-17 02:22:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:12,791 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-17 02:22:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:12,792 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:12,794 INFO L225 Difference]: With dead ends: 179 [2020-09-17 02:22:12,794 INFO L226 Difference]: Without dead ends: 177 [2020-09-17 02:22:12,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:22:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-17 02:22:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-17 02:22:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-17 02:22:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-17 02:22:12,797 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-17 02:22:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:12,797 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-17 02:22:12,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-17 02:22:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:12,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:12,798 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:13,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:13,000 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 55 times [2020-09-17 02:22:13,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:13,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900419098] [2020-09-17 02:22:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:13,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900419098] [2020-09-17 02:22:13,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781815363] [2020-09-17 02:22:13,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:13,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:13,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:13,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:13,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:13,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54591011] [2020-09-17 02:22:13,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:13,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:13,333 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-17 02:22:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:13,648 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-17 02:22:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:22:13,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:13,651 INFO L225 Difference]: With dead ends: 177 [2020-09-17 02:22:13,651 INFO L226 Difference]: Without dead ends: 175 [2020-09-17 02:22:13,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:22:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-17 02:22:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2020-09-17 02:22:13,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:22:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-17 02:22:13,656 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-17 02:22:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:13,656 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-17 02:22:13,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-17 02:22:13,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:13,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:13,657 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:13,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:13,868 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:13,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 56 times [2020-09-17 02:22:13,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:13,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280564803] [2020-09-17 02:22:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:13,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280564803] [2020-09-17 02:22:13,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646533789] [2020-09-17 02:22:13,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:22:14,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:14,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:14,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:14,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:14,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:14,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:14,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391300804] [2020-09-17 02:22:14,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:14,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:14,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:14,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:14,215 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-17 02:22:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:14,534 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2020-09-17 02:22:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:14,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:14,537 INFO L225 Difference]: With dead ends: 187 [2020-09-17 02:22:14,537 INFO L226 Difference]: Without dead ends: 185 [2020-09-17 02:22:14,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:22:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-17 02:22:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-17 02:22:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:22:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-17 02:22:14,541 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-17 02:22:14,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:14,541 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-17 02:22:14,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-17 02:22:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:14,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:14,542 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:14,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:14,742 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:14,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 57 times [2020-09-17 02:22:14,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:14,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243633171] [2020-09-17 02:22:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:14,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243633171] [2020-09-17 02:22:14,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566540969] [2020-09-17 02:22:14,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:14,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:22:14,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:14,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:15,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:15,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:15,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504017048] [2020-09-17 02:22:15,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:15,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:15,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:15,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:15,041 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-17 02:22:15,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:15,331 INFO L93 Difference]: Finished difference Result 181 states and 433 transitions. [2020-09-17 02:22:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:15,332 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:15,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:15,333 INFO L225 Difference]: With dead ends: 181 [2020-09-17 02:22:15,333 INFO L226 Difference]: Without dead ends: 179 [2020-09-17 02:22:15,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:22:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-17 02:22:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2020-09-17 02:22:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-17 02:22:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-17 02:22:15,336 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-17 02:22:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:15,337 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-17 02:22:15,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-17 02:22:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:15,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:15,337 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:15,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:15,538 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:15,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:15,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 58 times [2020-09-17 02:22:15,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:15,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140829986] [2020-09-17 02:22:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:15,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140829986] [2020-09-17 02:22:15,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952086076] [2020-09-17 02:22:15,716 INFO L93 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:15,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:15,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:15,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:15,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:15,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:15,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:15,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406473042] [2020-09-17 02:22:15,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:15,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:15,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:15,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:15,924 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-17 02:22:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:16,010 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-17 02:22:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:22:16,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:16,012 INFO L225 Difference]: With dead ends: 182 [2020-09-17 02:22:16,012 INFO L226 Difference]: Without dead ends: 180 [2020-09-17 02:22:16,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:22:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-17 02:22:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-17 02:22:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-17 02:22:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-17 02:22:16,016 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-17 02:22:16,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:16,017 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-17 02:22:16,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:16,017 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-17 02:22:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:16,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:16,018 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:16,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-09-17 02:22:16,228 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:16,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 59 times [2020-09-17 02:22:16,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:16,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804466032] [2020-09-17 02:22:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:16,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804466032] [2020-09-17 02:22:16,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68448581] [2020-09-17 02:22:16,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:22:16,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:16,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:16,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:16,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:16,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:16,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:16,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501579742] [2020-09-17 02:22:16,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:16,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:16,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:16,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:16,600 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-17 02:22:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:16,731 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-17 02:22:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:22:16,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:16,734 INFO L225 Difference]: With dead ends: 185 [2020-09-17 02:22:16,734 INFO L226 Difference]: Without dead ends: 183 [2020-09-17 02:22:16,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:22:16,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-17 02:22:16,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-17 02:22:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-17 02:22:16,739 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-17 02:22:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:16,739 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-17 02:22:16,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:16,739 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-17 02:22:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:16,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:16,740 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:16,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:16,941 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:16,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 60 times [2020-09-17 02:22:16,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:16,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606426299] [2020-09-17 02:22:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:17,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606426299] [2020-09-17 02:22:17,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975066056] [2020-09-17 02:22:17,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:17,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:22:17,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:17,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:17,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:17,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:17,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:17,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409005803] [2020-09-17 02:22:17,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:17,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:17,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:17,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:17,344 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:17,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:17,569 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-17 02:22:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:22:17,569 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:17,571 INFO L225 Difference]: With dead ends: 191 [2020-09-17 02:22:17,571 INFO L226 Difference]: Without dead ends: 189 [2020-09-17 02:22:17,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:22:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-17 02:22:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-17 02:22:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:22:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-17 02:22:17,576 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-17 02:22:17,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:17,576 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-17 02:22:17,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-17 02:22:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:17,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:17,577 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:17,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:17,790 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:17,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:17,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 61 times [2020-09-17 02:22:17,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:17,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853645728] [2020-09-17 02:22:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:17,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853645728] [2020-09-17 02:22:17,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238986191] [2020-09-17 02:22:17,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:17,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:17,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:18,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:18,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:18,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298722395] [2020-09-17 02:22:18,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:18,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:18,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:18,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:18,120 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-17 02:22:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:18,361 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-17 02:22:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:18,362 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:18,363 INFO L225 Difference]: With dead ends: 187 [2020-09-17 02:22:18,364 INFO L226 Difference]: Without dead ends: 185 [2020-09-17 02:22:18,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:22:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-17 02:22:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-17 02:22:18,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-17 02:22:18,367 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-17 02:22:18,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:18,367 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-17 02:22:18,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-17 02:22:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:18,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:18,368 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:18,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:18,570 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 62 times [2020-09-17 02:22:18,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:18,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4696159] [2020-09-17 02:22:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:18,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4696159] [2020-09-17 02:22:18,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958958763] [2020-09-17 02:22:18,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:22:18,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:18,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:18,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:18,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383155967] [2020-09-17 02:22:18,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:18,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:18,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:18,903 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:19,128 INFO L93 Difference]: Finished difference Result 194 states and 455 transitions. [2020-09-17 02:22:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:22:19,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:19,131 INFO L225 Difference]: With dead ends: 194 [2020-09-17 02:22:19,131 INFO L226 Difference]: Without dead ends: 192 [2020-09-17 02:22:19,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:22:19,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-17 02:22:19,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 142. [2020-09-17 02:22:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-17 02:22:19,134 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-17 02:22:19,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:19,134 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-17 02:22:19,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-17 02:22:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:19,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:19,137 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:19,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:19,348 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:19,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:19,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 63 times [2020-09-17 02:22:19,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:19,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242916294] [2020-09-17 02:22:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:19,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242916294] [2020-09-17 02:22:19,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581306941] [2020-09-17 02:22:19,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:19,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:22:19,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:19,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:19,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:19,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:19,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:19,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732177451] [2020-09-17 02:22:19,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:19,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:19,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:19,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:19,717 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-17 02:22:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:20,028 INFO L93 Difference]: Finished difference Result 186 states and 443 transitions. [2020-09-17 02:22:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:22:20,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:20,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:20,031 INFO L225 Difference]: With dead ends: 186 [2020-09-17 02:22:20,031 INFO L226 Difference]: Without dead ends: 184 [2020-09-17 02:22:20,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:22:20,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-17 02:22:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 139. [2020-09-17 02:22:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:22:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-17 02:22:20,036 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-17 02:22:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:20,037 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-17 02:22:20,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-17 02:22:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:20,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:20,038 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:20,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-17 02:22:20,239 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:20,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:20,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 64 times [2020-09-17 02:22:20,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:20,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58398382] [2020-09-17 02:22:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:20,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58398382] [2020-09-17 02:22:20,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095628100] [2020-09-17 02:22:20,374 INFO L93 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:20,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:20,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:20,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:20,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:20,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:20,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:20,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779254] [2020-09-17 02:22:20,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:20,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:20,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:20,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:20,576 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-17 02:22:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:20,689 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-17 02:22:20,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:22:20,690 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:20,692 INFO L225 Difference]: With dead ends: 178 [2020-09-17 02:22:20,692 INFO L226 Difference]: Without dead ends: 176 [2020-09-17 02:22:20,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:22:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-17 02:22:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-17 02:22:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-17 02:22:20,695 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-17 02:22:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:20,696 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-17 02:22:20,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-17 02:22:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:20,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:20,697 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:20,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-17 02:22:20,900 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:20,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 65 times [2020-09-17 02:22:20,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:20,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453633288] [2020-09-17 02:22:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:21,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453633288] [2020-09-17 02:22:21,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413186488] [2020-09-17 02:22:21,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:22:21,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:21,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:21,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:21,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:21,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:21,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:21,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931226631] [2020-09-17 02:22:21,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:21,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:21,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:21,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:21,245 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-17 02:22:21,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:21,371 INFO L93 Difference]: Finished difference Result 181 states and 428 transitions. [2020-09-17 02:22:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:22:21,371 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:21,373 INFO L225 Difference]: With dead ends: 181 [2020-09-17 02:22:21,373 INFO L226 Difference]: Without dead ends: 179 [2020-09-17 02:22:21,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:22:21,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-17 02:22:21,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2020-09-17 02:22:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:22:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-17 02:22:21,375 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-17 02:22:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:21,376 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-17 02:22:21,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-17 02:22:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:21,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:21,376 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:21,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:21,577 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:21,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 66 times [2020-09-17 02:22:21,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:21,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227931209] [2020-09-17 02:22:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:21,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227931209] [2020-09-17 02:22:21,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95675340] [2020-09-17 02:22:21,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:21,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:22:21,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:21,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:22,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:22,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:22,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189102270] [2020-09-17 02:22:22,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:22,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:22,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:22,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:22,434 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-17 02:22:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:22,669 INFO L93 Difference]: Finished difference Result 187 states and 440 transitions. [2020-09-17 02:22:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:22,670 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:22,672 INFO L225 Difference]: With dead ends: 187 [2020-09-17 02:22:22,672 INFO L226 Difference]: Without dead ends: 185 [2020-09-17 02:22:22,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:22:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-17 02:22:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-17 02:22:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:22:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-17 02:22:22,674 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-17 02:22:22,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:22,675 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-17 02:22:22,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:22,675 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-17 02:22:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:22,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:22,675 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:22,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:22,882 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 67 times [2020-09-17 02:22:22,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:22,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371812102] [2020-09-17 02:22:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:23,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371812102] [2020-09-17 02:22:23,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240003561] [2020-09-17 02:22:23,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:23,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:23,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:23,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:23,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:23,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999206205] [2020-09-17 02:22:23,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:23,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:23,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:23,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:23,210 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-17 02:22:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:23,367 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-17 02:22:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:22:23,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:23,370 INFO L225 Difference]: With dead ends: 174 [2020-09-17 02:22:23,370 INFO L226 Difference]: Without dead ends: 172 [2020-09-17 02:22:23,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:22:23,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-17 02:22:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-17 02:22:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-17 02:22:23,374 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-17 02:22:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:23,374 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-17 02:22:23,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-17 02:22:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:23,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:23,375 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:23,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:23,576 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:23,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 68 times [2020-09-17 02:22:23,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:23,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875193431] [2020-09-17 02:22:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:23,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875193431] [2020-09-17 02:22:23,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526576314] [2020-09-17 02:22:23,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:22:23,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:23,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:23,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:23,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:23,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:23,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:23,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618111788] [2020-09-17 02:22:23,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:23,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:23,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:23,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:23,914 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-17 02:22:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:24,102 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-09-17 02:22:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:24,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:24,105 INFO L225 Difference]: With dead ends: 177 [2020-09-17 02:22:24,105 INFO L226 Difference]: Without dead ends: 175 [2020-09-17 02:22:24,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:22:24,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-17 02:22:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 141. [2020-09-17 02:22:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:22:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-17 02:22:24,111 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-17 02:22:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:24,111 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-17 02:22:24,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-17 02:22:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:24,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:24,112 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:24,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:24,325 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:24,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 69 times [2020-09-17 02:22:24,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:24,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889745531] [2020-09-17 02:22:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:24,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889745531] [2020-09-17 02:22:24,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139976250] [2020-09-17 02:22:24,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:24,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:22:24,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:24,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:24,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:24,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:24,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:24,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100277705] [2020-09-17 02:22:24,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:24,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:24,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:24,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:24,630 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-17 02:22:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:24,803 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-17 02:22:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:22:24,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:24,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:24,805 INFO L225 Difference]: With dead ends: 175 [2020-09-17 02:22:24,805 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 02:22:24,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:22:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 02:22:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-17 02:22:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-17 02:22:24,808 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-17 02:22:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:24,808 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-17 02:22:24,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-17 02:22:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:24,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:24,809 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:25,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:25,017 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:25,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 70 times [2020-09-17 02:22:25,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:25,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454395149] [2020-09-17 02:22:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:25,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454395149] [2020-09-17 02:22:25,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116583060] [2020-09-17 02:22:25,127 INFO L93 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:25,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:25,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:25,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:25,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:25,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:25,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:25,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:25,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617538220] [2020-09-17 02:22:25,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:25,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:25,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:25,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:25,356 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:25,797 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-17 02:22:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:25,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:25,799 INFO L225 Difference]: With dead ends: 195 [2020-09-17 02:22:25,799 INFO L226 Difference]: Without dead ends: 190 [2020-09-17 02:22:25,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:22:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-17 02:22:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-17 02:22:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-17 02:22:25,803 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-17 02:22:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:25,804 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-17 02:22:25,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-17 02:22:25,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:25,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:25,805 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:26,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:26,005 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:26,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:26,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 71 times [2020-09-17 02:22:26,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:26,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858871111] [2020-09-17 02:22:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:26,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858871111] [2020-09-17 02:22:26,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603221993] [2020-09-17 02:22:26,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:22:26,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:26,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:26,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:26,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:26,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:26,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:26,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214805714] [2020-09-17 02:22:26,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:26,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:26,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:26,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:26,324 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-17 02:22:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:26,674 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-17 02:22:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:22:26,675 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:26,677 INFO L225 Difference]: With dead ends: 187 [2020-09-17 02:22:26,677 INFO L226 Difference]: Without dead ends: 185 [2020-09-17 02:22:26,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-17 02:22:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-17 02:22:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-17 02:22:26,680 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-17 02:22:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:26,681 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-17 02:22:26,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-17 02:22:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:26,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:26,681 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:26,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:26,882 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:26,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:26,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 72 times [2020-09-17 02:22:26,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:26,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063567370] [2020-09-17 02:22:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:26,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063567370] [2020-09-17 02:22:26,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602362746] [2020-09-17 02:22:26,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:27,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:22:27,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:27,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:27,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:27,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:27,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:27,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:27,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461137792] [2020-09-17 02:22:27,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:27,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:27,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:27,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:27,220 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:27,806 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-17 02:22:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:22:27,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:27,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:27,808 INFO L225 Difference]: With dead ends: 212 [2020-09-17 02:22:27,809 INFO L226 Difference]: Without dead ends: 207 [2020-09-17 02:22:27,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:22:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-17 02:22:27,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-17 02:22:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-17 02:22:27,812 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-17 02:22:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:27,812 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-17 02:22:27,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-17 02:22:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:27,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:27,813 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:28,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-17 02:22:28,013 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:28,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:28,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 73 times [2020-09-17 02:22:28,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:28,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498033758] [2020-09-17 02:22:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:28,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498033758] [2020-09-17 02:22:28,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833377233] [2020-09-17 02:22:28,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:28,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:28,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:28,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:28,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:28,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:28,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933415206] [2020-09-17 02:22:28,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:28,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:28,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:28,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:28,325 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:28,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:28,757 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-17 02:22:28,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:28,757 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:28,759 INFO L225 Difference]: With dead ends: 202 [2020-09-17 02:22:28,759 INFO L226 Difference]: Without dead ends: 197 [2020-09-17 02:22:28,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:22:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-17 02:22:28,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-17 02:22:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:22:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-17 02:22:28,763 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-17 02:22:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:28,763 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-17 02:22:28,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-17 02:22:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:28,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:28,764 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:28,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:28,975 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:28,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 74 times [2020-09-17 02:22:28,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:28,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901825618] [2020-09-17 02:22:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:29,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901825618] [2020-09-17 02:22:29,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775673795] [2020-09-17 02:22:29,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:22:29,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:29,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:29,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:29,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:29,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:29,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:29,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351720826] [2020-09-17 02:22:29,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:29,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:29,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:29,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:29,344 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-17 02:22:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:29,726 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-17 02:22:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:29,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:29,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:29,728 INFO L225 Difference]: With dead ends: 198 [2020-09-17 02:22:29,728 INFO L226 Difference]: Without dead ends: 196 [2020-09-17 02:22:29,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:29,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-17 02:22:29,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-17 02:22:29,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-17 02:22:29,732 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-17 02:22:29,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:29,732 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-17 02:22:29,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-17 02:22:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:29,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:29,733 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:29,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-09-17 02:22:29,934 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:29,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 75 times [2020-09-17 02:22:29,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:29,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789145073] [2020-09-17 02:22:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:30,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789145073] [2020-09-17 02:22:30,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568420739] [2020-09-17 02:22:30,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:30,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:22:30,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:30,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:30,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:30,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:30,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84949702] [2020-09-17 02:22:30,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:30,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:30,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:30,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:30,296 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-17 02:22:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:30,818 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-17 02:22:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:22:30,819 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:30,821 INFO L225 Difference]: With dead ends: 209 [2020-09-17 02:22:30,821 INFO L226 Difference]: Without dead ends: 207 [2020-09-17 02:22:30,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:22:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-17 02:22:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-17 02:22:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-17 02:22:30,825 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-17 02:22:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:30,826 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-17 02:22:30,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-17 02:22:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:30,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:30,827 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:31,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:31,034 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:31,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 76 times [2020-09-17 02:22:31,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:31,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175435198] [2020-09-17 02:22:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:31,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175435198] [2020-09-17 02:22:31,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569080965] [2020-09-17 02:22:31,143 INFO L93 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:31,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:31,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:31,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:31,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:31,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:31,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:31,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152641647] [2020-09-17 02:22:31,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:31,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:31,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:31,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:31,380 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-17 02:22:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:32,062 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-17 02:22:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:22:32,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:32,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:32,064 INFO L225 Difference]: With dead ends: 217 [2020-09-17 02:22:32,065 INFO L226 Difference]: Without dead ends: 212 [2020-09-17 02:22:32,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:22:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-17 02:22:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-17 02:22:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-17 02:22:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-17 02:22:32,069 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-17 02:22:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:32,069 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-17 02:22:32,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-17 02:22:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:32,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:32,070 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:32,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-17 02:22:32,273 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:32,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 77 times [2020-09-17 02:22:32,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:32,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613773197] [2020-09-17 02:22:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:32,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613773197] [2020-09-17 02:22:32,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345863412] [2020-09-17 02:22:32,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:22:32,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:32,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:32,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:32,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:34,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:34,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:34,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:34,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233152791] [2020-09-17 02:22:34,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:34,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:34,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:34,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=144, Unknown=1, NotChecked=0, Total=210 [2020-09-17 02:22:34,655 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-17 02:22:39,044 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-17 02:22:43,310 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-17 02:22:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:43,824 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-17 02:22:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:22:43,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:43,826 INFO L225 Difference]: With dead ends: 236 [2020-09-17 02:22:43,826 INFO L226 Difference]: Without dead ends: 228 [2020-09-17 02:22:43,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=307, Invalid=684, Unknown=1, NotChecked=0, Total=992 [2020-09-17 02:22:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-17 02:22:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-17 02:22:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:22:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-17 02:22:43,829 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-17 02:22:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:43,830 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-17 02:22:43,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-17 02:22:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:43,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:43,830 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:44,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-17 02:22:44,031 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:44,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 78 times [2020-09-17 02:22:44,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:44,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728017273] [2020-09-17 02:22:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:44,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728017273] [2020-09-17 02:22:44,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827703584] [2020-09-17 02:22:44,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:44,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:22:44,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:44,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:44,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:44,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:44,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:44,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:44,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:44,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024996921] [2020-09-17 02:22:44,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:44,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:44,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:44,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:44,368 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-17 02:22:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:45,036 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-17 02:22:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:22:45,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:45,038 INFO L225 Difference]: With dead ends: 219 [2020-09-17 02:22:45,038 INFO L226 Difference]: Without dead ends: 214 [2020-09-17 02:22:45,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=593, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:22:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-17 02:22:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-17 02:22:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:22:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-17 02:22:45,041 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-17 02:22:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:45,041 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-17 02:22:45,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-17 02:22:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:45,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:45,042 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:45,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-17 02:22:45,243 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:45,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 79 times [2020-09-17 02:22:45,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:45,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205229739] [2020-09-17 02:22:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:45,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205229739] [2020-09-17 02:22:45,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447185907] [2020-09-17 02:22:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:45,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:45,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:45,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:45,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:45,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030684693] [2020-09-17 02:22:45,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:45,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:45,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:45,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:45,561 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-17 02:22:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:45,899 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-17 02:22:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:22:45,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:45,901 INFO L225 Difference]: With dead ends: 197 [2020-09-17 02:22:45,901 INFO L226 Difference]: Without dead ends: 195 [2020-09-17 02:22:45,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-17 02:22:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-17 02:22:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-17 02:22:45,904 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-17 02:22:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:45,905 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-17 02:22:45,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-17 02:22:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:45,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:45,906 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:46,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:46,107 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:46,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 80 times [2020-09-17 02:22:46,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:46,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772643678] [2020-09-17 02:22:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:46,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772643678] [2020-09-17 02:22:46,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838188718] [2020-09-17 02:22:46,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:22:46,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:46,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:46,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:46,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:46,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:46,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:46,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267512797] [2020-09-17 02:22:46,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:46,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:46,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:46,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:46,424 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-17 02:22:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:46,801 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-17 02:22:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:22:46,802 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:46,803 INFO L225 Difference]: With dead ends: 202 [2020-09-17 02:22:46,803 INFO L226 Difference]: Without dead ends: 200 [2020-09-17 02:22:46,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-17 02:22:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-17 02:22:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-17 02:22:46,808 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-17 02:22:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:46,808 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-17 02:22:46,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-17 02:22:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:46,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:46,809 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:47,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-17 02:22:47,010 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:47,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 81 times [2020-09-17 02:22:47,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:47,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723656346] [2020-09-17 02:22:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:47,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723656346] [2020-09-17 02:22:47,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661398755] [2020-09-17 02:22:47,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:47,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:22:47,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:47,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:47,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:47,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:47,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:47,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195171749] [2020-09-17 02:22:47,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:47,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:47,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:47,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:47,328 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-17 02:22:47,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:47,705 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-17 02:22:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:22:47,706 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:47,707 INFO L225 Difference]: With dead ends: 197 [2020-09-17 02:22:47,707 INFO L226 Difference]: Without dead ends: 195 [2020-09-17 02:22:47,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-17 02:22:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-17 02:22:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-17 02:22:47,711 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-17 02:22:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:47,711 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-17 02:22:47,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-17 02:22:47,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:47,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:47,712 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:47,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:47,912 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 82 times [2020-09-17 02:22:47,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:47,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302283491] [2020-09-17 02:22:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:48,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302283491] [2020-09-17 02:22:48,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922378315] [2020-09-17 02:22:48,009 INFO L93 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:48,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:48,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:48,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:48,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:48,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:48,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:48,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87630453] [2020-09-17 02:22:48,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:48,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:48,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:48,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:48,265 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-17 02:22:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:48,915 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-17 02:22:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:22:48,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:48,918 INFO L225 Difference]: With dead ends: 214 [2020-09-17 02:22:48,918 INFO L226 Difference]: Without dead ends: 212 [2020-09-17 02:22:48,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:22:48,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-17 02:22:48,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-17 02:22:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-17 02:22:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-17 02:22:48,924 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-17 02:22:48,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:48,924 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-17 02:22:48,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:48,924 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-17 02:22:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:48,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:48,925 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:49,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-17 02:22:49,137 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:49,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 83 times [2020-09-17 02:22:49,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:49,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125029693] [2020-09-17 02:22:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:49,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125029693] [2020-09-17 02:22:49,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663852674] [2020-09-17 02:22:49,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:22:49,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:49,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:49,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:49,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:49,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:49,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:49,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643315422] [2020-09-17 02:22:49,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:49,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:49,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:49,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:49,523 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-17 02:22:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:50,063 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-17 02:22:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:22:50,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:50,065 INFO L225 Difference]: With dead ends: 217 [2020-09-17 02:22:50,065 INFO L226 Difference]: Without dead ends: 215 [2020-09-17 02:22:50,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:22:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-17 02:22:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-17 02:22:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-17 02:22:50,070 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-17 02:22:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:50,071 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-17 02:22:50,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:50,071 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-17 02:22:50,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:50,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:50,071 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:50,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:50,279 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:50,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:50,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 84 times [2020-09-17 02:22:50,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:50,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835319172] [2020-09-17 02:22:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:50,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835319172] [2020-09-17 02:22:50,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459141683] [2020-09-17 02:22:50,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:50,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:22:50,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:50,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:50,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:50,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:50,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:50,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222640030] [2020-09-17 02:22:50,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:50,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:50,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:50,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:50,597 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-17 02:22:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:51,141 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-17 02:22:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:22:51,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:51,143 INFO L225 Difference]: With dead ends: 211 [2020-09-17 02:22:51,143 INFO L226 Difference]: Without dead ends: 209 [2020-09-17 02:22:51,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=559, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:22:51,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-17 02:22:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-17 02:22:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-17 02:22:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-17 02:22:51,146 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-17 02:22:51,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:51,147 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-17 02:22:51,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-17 02:22:51,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:51,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:51,147 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:51,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:51,348 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:51,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 85 times [2020-09-17 02:22:51,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:51,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699103385] [2020-09-17 02:22:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:51,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699103385] [2020-09-17 02:22:51,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983743078] [2020-09-17 02:22:51,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:51,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:51,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:51,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:51,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779833526] [2020-09-17 02:22:51,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:51,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:51,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:51,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:51,636 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-17 02:22:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:52,262 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-17 02:22:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:22:52,263 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:52,264 INFO L225 Difference]: With dead ends: 211 [2020-09-17 02:22:52,264 INFO L226 Difference]: Without dead ends: 206 [2020-09-17 02:22:52,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:22:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-17 02:22:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-17 02:22:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-17 02:22:52,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-17 02:22:52,268 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-17 02:22:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:52,269 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-17 02:22:52,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:52,269 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-17 02:22:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:52,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:52,269 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:52,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-09-17 02:22:52,470 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:52,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 86 times [2020-09-17 02:22:52,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:52,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695889854] [2020-09-17 02:22:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:52,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695889854] [2020-09-17 02:22:52,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495281079] [2020-09-17 02:22:52,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:22:52,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:52,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:52,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:52,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:52,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:52,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:52,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488329337] [2020-09-17 02:22:52,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:52,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:52,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:52,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:52,817 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-17 02:22:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:53,573 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-17 02:22:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:22:53,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:53,575 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:22:53,575 INFO L226 Difference]: Without dead ends: 222 [2020-09-17 02:22:53,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:22:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-17 02:22:53,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-17 02:22:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-17 02:22:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-17 02:22:53,579 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-17 02:22:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:53,579 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-17 02:22:53,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:53,580 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-17 02:22:53,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:53,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:53,580 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:53,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-17 02:22:53,781 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:53,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:53,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 87 times [2020-09-17 02:22:53,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:53,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962154845] [2020-09-17 02:22:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:53,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962154845] [2020-09-17 02:22:53,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591012934] [2020-09-17 02:22:53,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:53,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:22:53,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:53,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:53,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:54,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:54,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:54,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857311886] [2020-09-17 02:22:54,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:54,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:54,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:54,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:54,087 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-17 02:22:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:54,706 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-17 02:22:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:22:54,707 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:54,707 INFO L225 Difference]: With dead ends: 221 [2020-09-17 02:22:54,707 INFO L226 Difference]: Without dead ends: 219 [2020-09-17 02:22:54,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:22:54,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-17 02:22:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-17 02:22:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-17 02:22:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-17 02:22:54,710 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-17 02:22:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:54,711 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-17 02:22:54,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-17 02:22:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:54,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:54,711 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:54,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:54,912 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 88 times [2020-09-17 02:22:54,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:54,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821945190] [2020-09-17 02:22:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:55,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821945190] [2020-09-17 02:22:55,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840727657] [2020-09-17 02:22:55,030 INFO L93 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:55,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:22:55,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:55,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:55,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:55,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:22:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:55,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:55,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:55,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668454172] [2020-09-17 02:22:55,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:55,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:55,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:55,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:55,217 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-17 02:22:56,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:56,002 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-17 02:22:56,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:22:56,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:56,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:56,004 INFO L225 Difference]: With dead ends: 240 [2020-09-17 02:22:56,004 INFO L226 Difference]: Without dead ends: 232 [2020-09-17 02:22:56,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:22:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-17 02:22:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-17 02:22:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-17 02:22:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-17 02:22:56,008 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-17 02:22:56,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:56,008 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-17 02:22:56,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-17 02:22:56,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:56,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:56,009 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:56,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-17 02:22:56,212 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 89 times [2020-09-17 02:22:56,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:56,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254005266] [2020-09-17 02:22:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:56,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254005266] [2020-09-17 02:22:56,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099271706] [2020-09-17 02:22:56,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:22:56,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:56,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:56,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:56,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:22:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:56,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:56,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:56,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296101101] [2020-09-17 02:22:56,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:56,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:56,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:56,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:56,499 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-17 02:22:57,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:57,257 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-17 02:22:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:22:57,258 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:57,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:57,258 INFO L225 Difference]: With dead ends: 238 [2020-09-17 02:22:57,259 INFO L226 Difference]: Without dead ends: 230 [2020-09-17 02:22:57,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=357, Invalid=833, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:22:57,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-17 02:22:57,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-17 02:22:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-17 02:22:57,263 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-17 02:22:57,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:57,263 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-17 02:22:57,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:57,263 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-17 02:22:57,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:57,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:57,264 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:57,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-17 02:22:57,472 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:57,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 90 times [2020-09-17 02:22:57,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:57,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220191690] [2020-09-17 02:22:57,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:57,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220191690] [2020-09-17 02:22:57,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143462634] [2020-09-17 02:22:57,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:57,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:22:57,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:57,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:57,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:57,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:57,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922233121] [2020-09-17 02:22:57,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:57,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:57,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:57,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:57,805 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-17 02:22:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:58,165 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-17 02:22:58,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:22:58,166 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:58,167 INFO L225 Difference]: With dead ends: 195 [2020-09-17 02:22:58,167 INFO L226 Difference]: Without dead ends: 193 [2020-09-17 02:22:58,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:22:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-17 02:22:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-17 02:22:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:22:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-17 02:22:58,170 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-17 02:22:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:58,170 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-17 02:22:58,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:58,170 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-17 02:22:58,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:58,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:58,171 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:58,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-17 02:22:58,372 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:58,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 91 times [2020-09-17 02:22:58,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:58,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112229449] [2020-09-17 02:22:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:58,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112229449] [2020-09-17 02:22:58,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929801293] [2020-09-17 02:22:58,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:58,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:58,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:22:58,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:22:58,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162256214] [2020-09-17 02:22:58,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:22:58,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:22:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:22:58,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:22:58,703 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-17 02:22:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:22:59,332 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-17 02:22:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:22:59,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:22:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:22:59,334 INFO L225 Difference]: With dead ends: 206 [2020-09-17 02:22:59,334 INFO L226 Difference]: Without dead ends: 204 [2020-09-17 02:22:59,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=569, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:22:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-17 02:22:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-17 02:22:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-17 02:22:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-17 02:22:59,338 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-17 02:22:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:22:59,338 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-17 02:22:59,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:22:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-17 02:22:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:22:59,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:22:59,339 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:22:59,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:22:59,540 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:22:59,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:22:59,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 92 times [2020-09-17 02:22:59,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:22:59,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376847020] [2020-09-17 02:22:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:22:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:22:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:22:59,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376847020] [2020-09-17 02:22:59,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536588801] [2020-09-17 02:22:59,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:22:59,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:22:59,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:22:59,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:22:59,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:22:59,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:23:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:23:00,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:23:00,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-17 02:23:00,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038060863] [2020-09-17 02:23:00,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:23:00,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:23:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:23:00,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=174, Unknown=1, NotChecked=0, Total=240 [2020-09-17 02:23:00,956 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-17 02:23:03,482 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-17 02:23:24,305 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-17 02:23:50,256 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-17 02:24:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:06,567 INFO L93 Difference]: Finished difference Result 242 states and 573 transitions. [2020-09-17 02:24:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:24:06,600 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-17 02:24:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:06,600 INFO L225 Difference]: With dead ends: 242 [2020-09-17 02:24:06,601 INFO L226 Difference]: Without dead ends: 237 [2020-09-17 02:24:06,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=402, Invalid=995, Unknown=9, NotChecked=0, Total=1406 [2020-09-17 02:24:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-17 02:24:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 139. [2020-09-17 02:24:06,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:24:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-17 02:24:06,603 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-17 02:24:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:06,603 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-17 02:24:06,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:24:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-17 02:24:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:06,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:06,604 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:06,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-17 02:24:06,805 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:06,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:06,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 93 times [2020-09-17 02:24:06,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:06,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108313457] [2020-09-17 02:24:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:06,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108313457] [2020-09-17 02:24:06,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580179098] [2020-09-17 02:24:06,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:06,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:24:06,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:06,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:06,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:07,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:07,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:07,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280610282] [2020-09-17 02:24:07,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:07,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:07,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:07,148 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-17 02:24:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:07,561 INFO L93 Difference]: Finished difference Result 192 states and 445 transitions. [2020-09-17 02:24:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:24:07,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:07,563 INFO L225 Difference]: With dead ends: 192 [2020-09-17 02:24:07,563 INFO L226 Difference]: Without dead ends: 190 [2020-09-17 02:24:07,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:24:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-17 02:24:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 141. [2020-09-17 02:24:07,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:24:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-17 02:24:07,567 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-17 02:24:07,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:07,567 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-17 02:24:07,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-17 02:24:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:07,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:07,567 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:07,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-17 02:24:07,768 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:07,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 94 times [2020-09-17 02:24:07,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:07,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301289646] [2020-09-17 02:24:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:07,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301289646] [2020-09-17 02:24:07,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75777021] [2020-09-17 02:24:07,886 INFO L93 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:07,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:24:07,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:07,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:07,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:08,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:08,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:08,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809518316] [2020-09-17 02:24:08,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:08,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:08,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:08,116 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-17 02:24:08,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:08,549 INFO L93 Difference]: Finished difference Result 203 states and 467 transitions. [2020-09-17 02:24:08,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:24:08,550 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:08,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:08,551 INFO L225 Difference]: With dead ends: 203 [2020-09-17 02:24:08,551 INFO L226 Difference]: Without dead ends: 201 [2020-09-17 02:24:08,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:24:08,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-17 02:24:08,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 142. [2020-09-17 02:24:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:24:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-17 02:24:08,555 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-17 02:24:08,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:08,555 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-17 02:24:08,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-17 02:24:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:08,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:08,556 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:08,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:08,757 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:08,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:08,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 95 times [2020-09-17 02:24:08,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:08,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138485423] [2020-09-17 02:24:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:08,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138485423] [2020-09-17 02:24:08,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960259118] [2020-09-17 02:24:08,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:24:08,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:24:08,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:08,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:09,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:09,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:09,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610069247] [2020-09-17 02:24:09,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:09,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:09,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:09,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:09,089 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-17 02:24:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:09,470 INFO L93 Difference]: Finished difference Result 194 states and 452 transitions. [2020-09-17 02:24:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:24:09,471 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:09,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:09,472 INFO L225 Difference]: With dead ends: 194 [2020-09-17 02:24:09,472 INFO L226 Difference]: Without dead ends: 192 [2020-09-17 02:24:09,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:24:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-17 02:24:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 137. [2020-09-17 02:24:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-17 02:24:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-17 02:24:09,476 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-17 02:24:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:09,476 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-17 02:24:09,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-17 02:24:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:09,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:09,478 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:09,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:09,688 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:09,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:09,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 96 times [2020-09-17 02:24:09,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:09,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115412411] [2020-09-17 02:24:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:09,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115412411] [2020-09-17 02:24:09,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676197822] [2020-09-17 02:24:09,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:09,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:24:09,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:09,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:09,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:10,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:10,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:10,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936619331] [2020-09-17 02:24:10,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:10,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:10,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:10,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:10,038 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-17 02:24:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:10,770 INFO L93 Difference]: Finished difference Result 210 states and 483 transitions. [2020-09-17 02:24:10,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:24:10,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:10,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:10,772 INFO L225 Difference]: With dead ends: 210 [2020-09-17 02:24:10,772 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 02:24:10,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:24:10,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 02:24:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 140. [2020-09-17 02:24:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:24:10,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-17 02:24:10,775 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-17 02:24:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:10,776 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-17 02:24:10,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:10,776 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-17 02:24:10,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:10,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:10,776 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:10,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:10,984 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:10,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:10,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 97 times [2020-09-17 02:24:10,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:10,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009154660] [2020-09-17 02:24:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:11,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009154660] [2020-09-17 02:24:11,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206755307] [2020-09-17 02:24:11,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:11,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:11,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:11,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:11,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427787698] [2020-09-17 02:24:11,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:11,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:11,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:11,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:11,324 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-17 02:24:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:11,985 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2020-09-17 02:24:11,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:24:11,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:11,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:11,987 INFO L225 Difference]: With dead ends: 219 [2020-09-17 02:24:11,987 INFO L226 Difference]: Without dead ends: 217 [2020-09-17 02:24:11,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=624, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:24:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-17 02:24:11,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 140. [2020-09-17 02:24:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-17 02:24:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-17 02:24:11,990 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-17 02:24:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:11,990 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-17 02:24:11,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-17 02:24:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:11,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:11,991 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:12,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:12,192 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:12,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 98 times [2020-09-17 02:24:12,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:12,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762631892] [2020-09-17 02:24:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:12,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762631892] [2020-09-17 02:24:12,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005553456] [2020-09-17 02:24:12,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:24:12,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:24:12,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:12,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:12,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:12,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:12,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194027268] [2020-09-17 02:24:12,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:12,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:12,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:12,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:12,516 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-17 02:24:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:13,076 INFO L93 Difference]: Finished difference Result 196 states and 455 transitions. [2020-09-17 02:24:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:24:13,077 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:13,078 INFO L225 Difference]: With dead ends: 196 [2020-09-17 02:24:13,078 INFO L226 Difference]: Without dead ends: 194 [2020-09-17 02:24:13,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:24:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-17 02:24:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 139. [2020-09-17 02:24:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:24:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-17 02:24:13,083 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-17 02:24:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:13,083 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-17 02:24:13,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-17 02:24:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:13,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:13,084 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:13,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-17 02:24:13,295 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:13,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:13,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 99 times [2020-09-17 02:24:13,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:13,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421251008] [2020-09-17 02:24:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:13,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421251008] [2020-09-17 02:24:13,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420500245] [2020-09-17 02:24:13,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:13,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:24:13,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:13,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:13,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:13,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:13,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:13,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654172515] [2020-09-17 02:24:13,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:13,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:13,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:13,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:13,629 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-17 02:24:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:14,406 INFO L93 Difference]: Finished difference Result 211 states and 490 transitions. [2020-09-17 02:24:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:24:14,407 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:14,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:14,408 INFO L225 Difference]: With dead ends: 211 [2020-09-17 02:24:14,408 INFO L226 Difference]: Without dead ends: 209 [2020-09-17 02:24:14,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:24:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-17 02:24:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 141. [2020-09-17 02:24:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-17 02:24:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-17 02:24:14,410 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-17 02:24:14,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:14,411 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-17 02:24:14,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-17 02:24:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:14,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:14,411 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:14,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-17 02:24:14,612 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 100 times [2020-09-17 02:24:14,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:14,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992606994] [2020-09-17 02:24:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:14,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992606994] [2020-09-17 02:24:14,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713526465] [2020-09-17 02:24:14,729 INFO L93 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:14,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:24:14,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:14,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:14,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:14,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:14,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:14,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721667507] [2020-09-17 02:24:14,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:14,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:14,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:14,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:14,961 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-17 02:24:15,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:15,732 INFO L93 Difference]: Finished difference Result 215 states and 498 transitions. [2020-09-17 02:24:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:24:15,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:15,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:15,734 INFO L225 Difference]: With dead ends: 215 [2020-09-17 02:24:15,734 INFO L226 Difference]: Without dead ends: 213 [2020-09-17 02:24:15,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:24:15,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-17 02:24:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-17 02:24:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:24:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-17 02:24:15,738 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-17 02:24:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:15,739 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-17 02:24:15,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-17 02:24:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:15,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:15,739 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:15,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-17 02:24:15,940 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:15,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 101 times [2020-09-17 02:24:15,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:15,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986557279] [2020-09-17 02:24:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:16,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986557279] [2020-09-17 02:24:16,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054338518] [2020-09-17 02:24:16,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-09-17 02:24:16,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:24:16,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:16,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:16,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:16,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:16,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:16,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042285319] [2020-09-17 02:24:16,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:16,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:16,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:16,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:16,291 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-17 02:24:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:17,095 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-17 02:24:17,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:24:17,096 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:17,097 INFO L225 Difference]: With dead ends: 202 [2020-09-17 02:24:17,097 INFO L226 Difference]: Without dead ends: 200 [2020-09-17 02:24:17,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:24:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-17 02:24:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2020-09-17 02:24:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-17 02:24:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-17 02:24:17,109 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-17 02:24:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:17,109 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-17 02:24:17,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-17 02:24:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:17,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:17,111 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:17,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:17,322 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:17,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 102 times [2020-09-17 02:24:17,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:17,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74890150] [2020-09-17 02:24:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:17,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74890150] [2020-09-17 02:24:17,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104378485] [2020-09-17 02:24:17,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:17,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:24:17,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:17,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:17,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:17,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:24:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:17,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:17,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:17,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132586301] [2020-09-17 02:24:17,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:17,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:17,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:17,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:17,649 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-17 02:24:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:18,414 INFO L93 Difference]: Finished difference Result 196 states and 472 transitions. [2020-09-17 02:24:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:24:18,415 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:18,416 INFO L225 Difference]: With dead ends: 196 [2020-09-17 02:24:18,417 INFO L226 Difference]: Without dead ends: 191 [2020-09-17 02:24:18,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:24:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-17 02:24:18,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 144. [2020-09-17 02:24:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-17 02:24:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-17 02:24:18,420 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-17 02:24:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:18,421 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-17 02:24:18,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-17 02:24:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:18,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:18,422 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:18,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-17 02:24:18,623 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:18,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 103 times [2020-09-17 02:24:18,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:18,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955490938] [2020-09-17 02:24:18,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:18,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955490938] [2020-09-17 02:24:18,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82893501] [2020-09-17 02:24:18,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:18,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:18,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:18,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:24:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:19,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:19,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:19,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894491046] [2020-09-17 02:24:19,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:19,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:19,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:19,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:19,004 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-17 02:24:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:20,054 INFO L93 Difference]: Finished difference Result 227 states and 547 transitions. [2020-09-17 02:24:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:24:20,055 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:20,056 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:24:20,056 INFO L226 Difference]: Without dead ends: 222 [2020-09-17 02:24:20,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=993, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:24:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-17 02:24:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2020-09-17 02:24:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-17 02:24:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-17 02:24:20,061 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-17 02:24:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:20,061 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-17 02:24:20,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-17 02:24:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:20,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:20,062 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:20,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:20,274 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:20,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 104 times [2020-09-17 02:24:20,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:20,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727774123] [2020-09-17 02:24:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:20,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727774123] [2020-09-17 02:24:20,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033271996] [2020-09-17 02:24:20,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-09-17 02:24:20,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:24:20,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:20,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:20,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:20,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:20,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308599668] [2020-09-17 02:24:20,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:20,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:20,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:20,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:20,630 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-17 02:24:21,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:21,567 INFO L93 Difference]: Finished difference Result 226 states and 535 transitions. [2020-09-17 02:24:21,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:24:21,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:21,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:21,569 INFO L225 Difference]: With dead ends: 226 [2020-09-17 02:24:21,569 INFO L226 Difference]: Without dead ends: 224 [2020-09-17 02:24:21,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:24:21,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-17 02:24:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2020-09-17 02:24:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-17 02:24:21,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-17 02:24:21,573 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-17 02:24:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:21,573 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-17 02:24:21,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:21,574 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-17 02:24:21,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:21,574 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:21,574 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:21,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-17 02:24:21,775 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:21,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:21,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 105 times [2020-09-17 02:24:21,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:21,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140289963] [2020-09-17 02:24:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:21,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140289963] [2020-09-17 02:24:21,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481133729] [2020-09-17 02:24:21,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:21,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:24:21,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:21,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:21,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:22,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:24:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:22,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:22,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:22,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209392052] [2020-09-17 02:24:22,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:22,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:22,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:22,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:22,191 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-17 02:24:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:23,412 INFO L93 Difference]: Finished difference Result 247 states and 597 transitions. [2020-09-17 02:24:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:24:23,412 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:23,413 INFO L225 Difference]: With dead ends: 247 [2020-09-17 02:24:23,413 INFO L226 Difference]: Without dead ends: 239 [2020-09-17 02:24:23,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=448, Invalid=1034, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:24:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-17 02:24:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 146. [2020-09-17 02:24:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-17 02:24:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-17 02:24:23,416 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-17 02:24:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:23,416 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-17 02:24:23,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-17 02:24:23,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:23,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:23,417 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:23,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:23,617 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 106 times [2020-09-17 02:24:23,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:23,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827321249] [2020-09-17 02:24:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:23,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827321249] [2020-09-17 02:24:23,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041270825] [2020-09-17 02:24:23,739 INFO L93 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:23,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:24:23,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:23,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:23,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:23,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:24:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:23,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:23,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:23,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603185158] [2020-09-17 02:24:23,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:23,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:23,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:23,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:23,974 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-17 02:24:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:25,168 INFO L93 Difference]: Finished difference Result 246 states and 590 transitions. [2020-09-17 02:24:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:24:25,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:25,170 INFO L225 Difference]: With dead ends: 246 [2020-09-17 02:24:25,171 INFO L226 Difference]: Without dead ends: 238 [2020-09-17 02:24:25,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:24:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-17 02:24:25,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-17 02:24:25,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:24:25,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-17 02:24:25,175 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-17 02:24:25,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:25,175 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-17 02:24:25,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:25,175 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-17 02:24:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:25,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:25,176 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:25,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-09-17 02:24:25,386 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:25,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:25,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 107 times [2020-09-17 02:24:25,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:25,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785897541] [2020-09-17 02:24:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:25,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785897541] [2020-09-17 02:24:25,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485923504] [2020-09-17 02:24:25,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:25,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:24:25,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:25,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:25,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:25,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:25,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958683000] [2020-09-17 02:24:25,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:25,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:25,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:25,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:25,714 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-17 02:24:26,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:26,389 INFO L93 Difference]: Finished difference Result 209 states and 489 transitions. [2020-09-17 02:24:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:24:26,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:26,391 INFO L225 Difference]: With dead ends: 209 [2020-09-17 02:24:26,391 INFO L226 Difference]: Without dead ends: 207 [2020-09-17 02:24:26,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:24:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-17 02:24:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 136. [2020-09-17 02:24:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-17 02:24:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-17 02:24:26,395 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-17 02:24:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:26,395 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-17 02:24:26,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-17 02:24:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:26,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:26,396 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:26,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:26,597 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:26,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 108 times [2020-09-17 02:24:26,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:26,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597332624] [2020-09-17 02:24:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:26,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597332624] [2020-09-17 02:24:26,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966753886] [2020-09-17 02:24:26,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:26,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:24:26,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:26,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:26,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:26,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:26,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893528846] [2020-09-17 02:24:26,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:26,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:26,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:26,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:26,927 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-17 02:24:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:27,777 INFO L93 Difference]: Finished difference Result 205 states and 487 transitions. [2020-09-17 02:24:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:24:27,778 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:27,779 INFO L225 Difference]: With dead ends: 205 [2020-09-17 02:24:27,779 INFO L226 Difference]: Without dead ends: 203 [2020-09-17 02:24:27,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:24:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-17 02:24:27,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 137. [2020-09-17 02:24:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-17 02:24:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-17 02:24:27,783 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-17 02:24:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:27,783 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-17 02:24:27,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:27,783 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-17 02:24:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:27,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:27,783 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:27,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-17 02:24:27,984 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:27,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:27,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 109 times [2020-09-17 02:24:27,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:27,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556086951] [2020-09-17 02:24:27,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:28,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556086951] [2020-09-17 02:24:28,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145283254] [2020-09-17 02:24:28,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:28,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:28,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:28,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:24:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:28,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:28,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:28,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472137048] [2020-09-17 02:24:28,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:28,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:28,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:28,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:28,308 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-17 02:24:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:29,397 INFO L93 Difference]: Finished difference Result 228 states and 547 transitions. [2020-09-17 02:24:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:24:29,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:29,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:29,399 INFO L225 Difference]: With dead ends: 228 [2020-09-17 02:24:29,399 INFO L226 Difference]: Without dead ends: 220 [2020-09-17 02:24:29,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:24:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-17 02:24:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 137. [2020-09-17 02:24:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-17 02:24:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-17 02:24:29,409 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-17 02:24:29,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:29,410 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-17 02:24:29,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-17 02:24:29,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:29,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:29,411 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:29,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-17 02:24:29,611 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:29,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:29,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 110 times [2020-09-17 02:24:29,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:29,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318391015] [2020-09-17 02:24:29,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:29,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318391015] [2020-09-17 02:24:29,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054850723] [2020-09-17 02:24:29,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:29,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:24:29,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:29,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:29,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:29,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:24:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:29,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:29,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:29,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129868510] [2020-09-17 02:24:29,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:29,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:29,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:29,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:29,935 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-17 02:24:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:30,895 INFO L93 Difference]: Finished difference Result 228 states and 550 transitions. [2020-09-17 02:24:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:24:30,896 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:30,897 INFO L225 Difference]: With dead ends: 228 [2020-09-17 02:24:30,897 INFO L226 Difference]: Without dead ends: 220 [2020-09-17 02:24:30,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:24:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-17 02:24:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 133. [2020-09-17 02:24:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-17 02:24:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-17 02:24:30,901 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-17 02:24:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:30,902 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-17 02:24:30,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-17 02:24:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:30,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:30,902 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:31,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-17 02:24:31,110 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:31,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 111 times [2020-09-17 02:24:31,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:31,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914450080] [2020-09-17 02:24:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:31,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914450080] [2020-09-17 02:24:31,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2405494] [2020-09-17 02:24:31,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:31,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:24:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:31,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:24:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:31,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:24:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:31,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:31,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-17 02:24:31,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305754548] [2020-09-17 02:24:31,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:24:31,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:31,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:24:31,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:24:31,440 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-17 02:24:32,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:32,499 INFO L93 Difference]: Finished difference Result 224 states and 533 transitions. [2020-09-17 02:24:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:24:32,503 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-17 02:24:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:32,504 INFO L225 Difference]: With dead ends: 224 [2020-09-17 02:24:32,504 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:24:32,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:24:32,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:24:32,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 130. [2020-09-17 02:24:32,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-17 02:24:32,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-17 02:24:32,507 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-17 02:24:32,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:32,508 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-17 02:24:32,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:24:32,508 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-17 02:24:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:32,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:32,509 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:32,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:32,719 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-17 02:24:32,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:32,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409128228] [2020-09-17 02:24:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:32,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409128228] [2020-09-17 02:24:32,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985952177] [2020-09-17 02:24:32,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:32,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:24:32,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:32,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:32,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:33,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:24:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:33,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:33,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-17 02:24:33,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131370085] [2020-09-17 02:24:33,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:24:33,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:33,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:24:33,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:24:33,155 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-17 02:24:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:33,428 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-17 02:24:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:24:33,429 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-17 02:24:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:33,430 INFO L225 Difference]: With dead ends: 185 [2020-09-17 02:24:33,430 INFO L226 Difference]: Without dead ends: 180 [2020-09-17 02:24:33,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:24:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-17 02:24:33,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-17 02:24:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-17 02:24:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-17 02:24:33,433 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-17 02:24:33,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:33,433 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-17 02:24:33,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:24:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-17 02:24:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:33,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:33,434 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:33,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:33,641 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-17 02:24:33,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:33,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385977408] [2020-09-17 02:24:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:33,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385977408] [2020-09-17 02:24:33,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535821269] [2020-09-17 02:24:33,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:33,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:24:33,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:33,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:33,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:34,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:34,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:34,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56510278] [2020-09-17 02:24:34,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:34,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:34,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:34,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:34,090 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-17 02:24:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:34,361 INFO L93 Difference]: Finished difference Result 186 states and 435 transitions. [2020-09-17 02:24:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:24:34,362 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:34,363 INFO L225 Difference]: With dead ends: 186 [2020-09-17 02:24:34,363 INFO L226 Difference]: Without dead ends: 183 [2020-09-17 02:24:34,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:24:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-17 02:24:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2020-09-17 02:24:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-17 02:24:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-17 02:24:34,367 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-17 02:24:34,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:34,367 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-17 02:24:34,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-17 02:24:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:34,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:34,367 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:34,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-17 02:24:34,568 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-17 02:24:34,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:34,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481374989] [2020-09-17 02:24:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:34,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481374989] [2020-09-17 02:24:34,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940034970] [2020-09-17 02:24:34,710 INFO L93 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:34,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:24:34,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:34,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:34,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:34,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:34,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:34,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918100376] [2020-09-17 02:24:34,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:35,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:35,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:35,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:35,000 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-17 02:24:35,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:35,431 INFO L93 Difference]: Finished difference Result 203 states and 468 transitions. [2020-09-17 02:24:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:24:35,432 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:35,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:35,433 INFO L225 Difference]: With dead ends: 203 [2020-09-17 02:24:35,433 INFO L226 Difference]: Without dead ends: 200 [2020-09-17 02:24:35,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:24:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-17 02:24:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 148. [2020-09-17 02:24:35,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-17 02:24:35,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-17 02:24:35,437 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-17 02:24:35,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:35,437 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-17 02:24:35,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:35,437 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-17 02:24:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:35,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:35,438 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:35,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-17 02:24:35,639 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:35,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:35,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-17 02:24:35,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:35,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134490621] [2020-09-17 02:24:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:35,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134490621] [2020-09-17 02:24:35,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070784729] [2020-09-17 02:24:35,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:35,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:24:35,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:35,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:36,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:36,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:36,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572296231] [2020-09-17 02:24:36,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:36,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:36,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:36,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:36,030 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-17 02:24:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:36,572 INFO L93 Difference]: Finished difference Result 211 states and 486 transitions. [2020-09-17 02:24:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:24:36,573 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:36,574 INFO L225 Difference]: With dead ends: 211 [2020-09-17 02:24:36,574 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 02:24:36,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:24:36,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 02:24:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 149. [2020-09-17 02:24:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-17 02:24:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-17 02:24:36,577 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-17 02:24:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:36,578 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-17 02:24:36,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-17 02:24:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:36,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:36,578 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:36,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:36,779 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:36,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-17 02:24:36,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:36,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245636984] [2020-09-17 02:24:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:36,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245636984] [2020-09-17 02:24:36,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712065227] [2020-09-17 02:24:36,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:36,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:24:36,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:36,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:36,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:37,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:37,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:37,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101300034] [2020-09-17 02:24:37,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:37,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:37,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:37,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:37,246 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-17 02:24:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:37,985 INFO L93 Difference]: Finished difference Result 213 states and 492 transitions. [2020-09-17 02:24:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:24:37,986 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:37,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:37,988 INFO L225 Difference]: With dead ends: 213 [2020-09-17 02:24:37,988 INFO L226 Difference]: Without dead ends: 210 [2020-09-17 02:24:37,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:24:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-17 02:24:37,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 150. [2020-09-17 02:24:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-17 02:24:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-17 02:24:37,993 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-17 02:24:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:37,994 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-17 02:24:37,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-17 02:24:37,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:37,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:37,995 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:38,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:38,208 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-17 02:24:38,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:38,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914274608] [2020-09-17 02:24:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:38,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914274608] [2020-09-17 02:24:38,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039741095] [2020-09-17 02:24:38,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:38,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:38,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:38,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:38,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63873566] [2020-09-17 02:24:38,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:38,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:38,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:38,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:38,585 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-17 02:24:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:39,171 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2020-09-17 02:24:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:24:39,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:39,173 INFO L225 Difference]: With dead ends: 207 [2020-09-17 02:24:39,173 INFO L226 Difference]: Without dead ends: 204 [2020-09-17 02:24:39,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:24:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-17 02:24:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2020-09-17 02:24:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-17 02:24:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-17 02:24:39,176 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-17 02:24:39,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:39,176 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-17 02:24:39,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:39,176 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-17 02:24:39,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:39,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:39,177 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:39,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:39,377 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:39,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:39,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-17 02:24:39,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:39,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322813797] [2020-09-17 02:24:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:39,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322813797] [2020-09-17 02:24:39,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490355114] [2020-09-17 02:24:39,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:39,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:24:39,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:39,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:39,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:39,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:39,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877047655] [2020-09-17 02:24:39,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:39,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:39,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:39,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:39,744 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-17 02:24:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:40,230 INFO L93 Difference]: Finished difference Result 197 states and 464 transitions. [2020-09-17 02:24:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:24:40,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:40,233 INFO L225 Difference]: With dead ends: 197 [2020-09-17 02:24:40,233 INFO L226 Difference]: Without dead ends: 194 [2020-09-17 02:24:40,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:24:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-17 02:24:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2020-09-17 02:24:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-17 02:24:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-17 02:24:40,236 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-17 02:24:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:40,236 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-17 02:24:40,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-17 02:24:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:24:40,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:40,237 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:40,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-09-17 02:24:40,445 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:40,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:40,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-17 02:24:40,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:40,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610197837] [2020-09-17 02:24:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:40,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610197837] [2020-09-17 02:24:40,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351810237] [2020-09-17 02:24:40,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:40,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:24:40,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:40,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:40,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:40,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:24:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:40,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:40,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:40,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188003282] [2020-09-17 02:24:40,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:40,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:40,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:40,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:40,797 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-17 02:24:41,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:41,411 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-17 02:24:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:24:41,412 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-17 02:24:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:41,413 INFO L225 Difference]: With dead ends: 202 [2020-09-17 02:24:41,413 INFO L226 Difference]: Without dead ends: 196 [2020-09-17 02:24:41,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:24:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-17 02:24:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-17 02:24:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-17 02:24:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-17 02:24:41,416 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-17 02:24:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:41,416 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-17 02:24:41,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-17 02:24:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:41,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:41,417 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:41,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-17 02:24:41,618 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:41,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:41,618 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 112 times [2020-09-17 02:24:41,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:41,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438377781] [2020-09-17 02:24:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:41,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438377781] [2020-09-17 02:24:41,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161549717] [2020-09-17 02:24:41,783 INFO L93 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:41,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:24:41,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:41,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:41,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:42,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:42,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:42,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803417285] [2020-09-17 02:24:42,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:42,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:42,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:42,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:42,066 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-17 02:24:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:42,158 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-17 02:24:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:24:42,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:42,160 INFO L225 Difference]: With dead ends: 188 [2020-09-17 02:24:42,160 INFO L226 Difference]: Without dead ends: 186 [2020-09-17 02:24:42,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-17 02:24:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-17 02:24:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-17 02:24:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-17 02:24:42,163 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-17 02:24:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:42,163 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-17 02:24:42,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-17 02:24:42,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:42,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:42,164 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:42,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-17 02:24:42,365 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:42,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:42,365 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 113 times [2020-09-17 02:24:42,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:42,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062956339] [2020-09-17 02:24:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:42,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062956339] [2020-09-17 02:24:42,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513812515] [2020-09-17 02:24:42,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:42,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:24:42,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:42,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:42,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:42,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:42,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:42,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898687179] [2020-09-17 02:24:42,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:42,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:42,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:42,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:42,791 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-17 02:24:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:42,931 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-17 02:24:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:24:42,932 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:42,932 INFO L225 Difference]: With dead ends: 199 [2020-09-17 02:24:42,933 INFO L226 Difference]: Without dead ends: 197 [2020-09-17 02:24:42,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:24:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-17 02:24:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-17 02:24:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-17 02:24:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-17 02:24:42,935 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-17 02:24:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:42,935 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-17 02:24:42,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-17 02:24:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:42,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:42,936 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:43,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-17 02:24:43,137 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 114 times [2020-09-17 02:24:43,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:43,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272552375] [2020-09-17 02:24:43,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:43,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272552375] [2020-09-17 02:24:43,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645381802] [2020-09-17 02:24:43,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:43,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:24:43,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:43,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:43,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:43,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:43,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:43,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441262289] [2020-09-17 02:24:43,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:43,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:43,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:43,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:43,619 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-17 02:24:43,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:43,896 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-17 02:24:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:24:43,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:43,898 INFO L225 Difference]: With dead ends: 210 [2020-09-17 02:24:43,898 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 02:24:43,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:24:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 02:24:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-17 02:24:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-17 02:24:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-17 02:24:43,902 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-17 02:24:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:43,902 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-17 02:24:43,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-17 02:24:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:43,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:43,902 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:44,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-17 02:24:44,103 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 115 times [2020-09-17 02:24:44,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:44,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353555969] [2020-09-17 02:24:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:44,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353555969] [2020-09-17 02:24:44,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565196913] [2020-09-17 02:24:44,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:44,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:44,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:45,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:45,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:45,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044557321] [2020-09-17 02:24:45,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:45,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:45,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:45,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:45,653 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-17 02:24:46,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:46,009 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-17 02:24:46,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:24:46,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:46,011 INFO L225 Difference]: With dead ends: 210 [2020-09-17 02:24:46,011 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 02:24:46,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:24:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 02:24:46,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-17 02:24:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-17 02:24:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-17 02:24:46,015 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-17 02:24:46,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:46,015 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-17 02:24:46,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:46,015 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-17 02:24:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:46,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:46,016 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:46,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-17 02:24:46,223 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:46,224 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 116 times [2020-09-17 02:24:46,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:46,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543506837] [2020-09-17 02:24:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:46,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543506837] [2020-09-17 02:24:46,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428887538] [2020-09-17 02:24:46,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:46,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:24:46,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:46,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:46,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:49,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:49,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:49,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210437506] [2020-09-17 02:24:49,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:49,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:49,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:49,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:24:49,546 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-17 02:24:53,767 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:24:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:54,037 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-17 02:24:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:24:54,038 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:54,039 INFO L225 Difference]: With dead ends: 218 [2020-09-17 02:24:54,039 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:24:54,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=144, Invalid=317, Unknown=1, NotChecked=0, Total=462 [2020-09-17 02:24:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:24:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-17 02:24:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:24:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-17 02:24:54,042 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-17 02:24:54,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:54,042 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-17 02:24:54,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:54,042 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-17 02:24:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:54,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:54,043 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:54,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:54,244 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:54,244 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 117 times [2020-09-17 02:24:54,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:54,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733718430] [2020-09-17 02:24:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:54,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733718430] [2020-09-17 02:24:54,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730670055] [2020-09-17 02:24:54,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:54,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:24:54,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:54,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:54,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:54,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:54,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273673826] [2020-09-17 02:24:54,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:54,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:54,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:54,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:54,769 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-17 02:24:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:55,160 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-17 02:24:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:24:55,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:55,162 INFO L225 Difference]: With dead ends: 212 [2020-09-17 02:24:55,162 INFO L226 Difference]: Without dead ends: 210 [2020-09-17 02:24:55,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:24:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-17 02:24:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-17 02:24:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-17 02:24:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-17 02:24:55,165 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-17 02:24:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:55,166 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-17 02:24:55,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-17 02:24:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:55,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:55,166 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:55,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-17 02:24:55,367 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:55,367 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 118 times [2020-09-17 02:24:55,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:55,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566908201] [2020-09-17 02:24:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:55,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566908201] [2020-09-17 02:24:55,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558516995] [2020-09-17 02:24:55,508 INFO L93 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:55,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:24:55,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:55,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:55,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:55,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:55,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:55,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686688223] [2020-09-17 02:24:55,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:55,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:55,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:55,778 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-17 02:24:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:56,151 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-17 02:24:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:24:56,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:56,153 INFO L225 Difference]: With dead ends: 212 [2020-09-17 02:24:56,153 INFO L226 Difference]: Without dead ends: 210 [2020-09-17 02:24:56,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:24:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-17 02:24:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-17 02:24:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:24:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-17 02:24:56,158 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-17 02:24:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:56,158 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-17 02:24:56,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-17 02:24:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:56,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:56,159 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:56,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:56,362 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:56,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:56,363 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 119 times [2020-09-17 02:24:56,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:56,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108047062] [2020-09-17 02:24:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:56,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108047062] [2020-09-17 02:24:56,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374128676] [2020-09-17 02:24:56,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:56,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:24:56,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:56,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:56,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:56,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:56,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:56,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145111466] [2020-09-17 02:24:56,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:56,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:56,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:56,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:56,768 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-17 02:24:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:57,194 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-17 02:24:57,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:24:57,195 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:57,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:57,196 INFO L225 Difference]: With dead ends: 224 [2020-09-17 02:24:57,196 INFO L226 Difference]: Without dead ends: 222 [2020-09-17 02:24:57,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:24:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-17 02:24:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-17 02:24:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:24:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-17 02:24:57,199 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-17 02:24:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:57,199 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-17 02:24:57,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-17 02:24:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:57,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:57,200 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:57,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:57,401 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 120 times [2020-09-17 02:24:57,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:57,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142150290] [2020-09-17 02:24:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:57,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142150290] [2020-09-17 02:24:57,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934409370] [2020-09-17 02:24:57,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:57,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:24:57,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:57,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:57,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:57,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:57,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:57,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108709392] [2020-09-17 02:24:57,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:57,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:57,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:57,818 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-17 02:24:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:58,206 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-17 02:24:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:24:58,207 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:58,208 INFO L225 Difference]: With dead ends: 218 [2020-09-17 02:24:58,208 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:24:58,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:24:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:24:58,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-17 02:24:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:24:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-17 02:24:58,211 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-17 02:24:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:58,212 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-17 02:24:58,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-17 02:24:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:58,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:58,213 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:58,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:58,414 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:58,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:58,415 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 121 times [2020-09-17 02:24:58,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:58,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893247918] [2020-09-17 02:24:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:58,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893247918] [2020-09-17 02:24:58,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263700798] [2020-09-17 02:24:58,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:58,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:58,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:58,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:58,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:58,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542353863] [2020-09-17 02:24:58,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:58,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:58,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:58,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:58,820 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-17 02:24:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:24:59,124 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-17 02:24:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:24:59,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:24:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:24:59,126 INFO L225 Difference]: With dead ends: 206 [2020-09-17 02:24:59,126 INFO L226 Difference]: Without dead ends: 204 [2020-09-17 02:24:59,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:24:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-17 02:24:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-17 02:24:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-17 02:24:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-17 02:24:59,129 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-17 02:24:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:24:59,129 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-17 02:24:59,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:24:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-17 02:24:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:24:59,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:24:59,130 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:24:59,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:59,331 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:24:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:24:59,331 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 122 times [2020-09-17 02:24:59,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:24:59,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70045599] [2020-09-17 02:24:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:24:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:24:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:59,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70045599] [2020-09-17 02:24:59,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801397747] [2020-09-17 02:24:59,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:24:59,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:24:59,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:24:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:24:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:24:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:24:59,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:24:59,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:24:59,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761724457] [2020-09-17 02:24:59,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:24:59,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:24:59,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:24:59,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:24:59,766 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-17 02:25:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:00,348 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-09-17 02:25:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:00,349 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:00,350 INFO L225 Difference]: With dead ends: 210 [2020-09-17 02:25:00,351 INFO L226 Difference]: Without dead ends: 208 [2020-09-17 02:25:00,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:25:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-17 02:25:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2020-09-17 02:25:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-17 02:25:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-17 02:25:00,356 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-17 02:25:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:00,356 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-17 02:25:00,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-17 02:25:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:00,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:00,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:00,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-17 02:25:00,570 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:00,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:00,571 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 123 times [2020-09-17 02:25:00,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:00,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505927401] [2020-09-17 02:25:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:00,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505927401] [2020-09-17 02:25:00,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692639753] [2020-09-17 02:25:00,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:00,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:25:00,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:00,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:00,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:01,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:01,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:01,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125800956] [2020-09-17 02:25:01,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:01,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:01,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:01,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:01,004 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-17 02:25:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:01,500 INFO L93 Difference]: Finished difference Result 216 states and 515 transitions. [2020-09-17 02:25:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:01,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:01,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:01,502 INFO L225 Difference]: With dead ends: 216 [2020-09-17 02:25:01,502 INFO L226 Difference]: Without dead ends: 214 [2020-09-17 02:25:01,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:25:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-17 02:25:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 158. [2020-09-17 02:25:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-17 02:25:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-17 02:25:01,507 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-17 02:25:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:01,507 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-17 02:25:01,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-17 02:25:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:01,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:01,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:01,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-17 02:25:01,717 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:01,718 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 124 times [2020-09-17 02:25:01,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:01,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530831894] [2020-09-17 02:25:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:01,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530831894] [2020-09-17 02:25:01,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849969730] [2020-09-17 02:25:01,863 INFO L93 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:01,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:25:01,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:01,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:01,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:03,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:03,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:03,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921486194] [2020-09-17 02:25:03,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:03,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:03,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:03,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:03,196 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-17 02:25:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:03,724 INFO L93 Difference]: Finished difference Result 227 states and 536 transitions. [2020-09-17 02:25:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:25:03,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:03,726 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:25:03,726 INFO L226 Difference]: Without dead ends: 225 [2020-09-17 02:25:03,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:25:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-17 02:25:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-17 02:25:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:25:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-17 02:25:03,730 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-17 02:25:03,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:03,730 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-17 02:25:03,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-17 02:25:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:03,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:03,730 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:03,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-17 02:25:03,931 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:03,932 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 125 times [2020-09-17 02:25:03,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:03,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207529028] [2020-09-17 02:25:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:04,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207529028] [2020-09-17 02:25:04,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504243207] [2020-09-17 02:25:04,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:04,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:25:04,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:04,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:04,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:04,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:04,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:04,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751536264] [2020-09-17 02:25:04,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:04,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:04,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:04,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:04,354 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-17 02:25:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:04,802 INFO L93 Difference]: Finished difference Result 219 states and 521 transitions. [2020-09-17 02:25:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:25:04,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:04,804 INFO L225 Difference]: With dead ends: 219 [2020-09-17 02:25:04,804 INFO L226 Difference]: Without dead ends: 217 [2020-09-17 02:25:04,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:25:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-17 02:25:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-09-17 02:25:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-17 02:25:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-17 02:25:04,808 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-17 02:25:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:04,808 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-17 02:25:04,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-17 02:25:04,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:04,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:04,808 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:05,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-17 02:25:05,009 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:05,010 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 126 times [2020-09-17 02:25:05,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:05,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045605287] [2020-09-17 02:25:05,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:05,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045605287] [2020-09-17 02:25:05,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296225168] [2020-09-17 02:25:05,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:05,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:25:05,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:05,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:05,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:05,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:05,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:05,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252398932] [2020-09-17 02:25:05,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:05,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:05,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:05,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:05,488 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-17 02:25:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:05,953 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-17 02:25:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:05,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:05,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:05,955 INFO L225 Difference]: With dead ends: 218 [2020-09-17 02:25:05,955 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:25:05,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:25:05,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:25:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 160. [2020-09-17 02:25:05,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:25:05,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-17 02:25:05,958 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-17 02:25:05,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:05,959 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-17 02:25:05,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:05,959 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-17 02:25:05,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:05,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:05,959 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:06,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:06,160 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:06,160 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 127 times [2020-09-17 02:25:06,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:06,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495715203] [2020-09-17 02:25:06,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:06,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495715203] [2020-09-17 02:25:06,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704294525] [2020-09-17 02:25:06,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:06,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:06,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:06,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:06,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:06,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367539830] [2020-09-17 02:25:06,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:06,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:06,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:06,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:06,597 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-17 02:25:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:07,015 INFO L93 Difference]: Finished difference Result 209 states and 498 transitions. [2020-09-17 02:25:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:07,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:07,016 INFO L225 Difference]: With dead ends: 209 [2020-09-17 02:25:07,016 INFO L226 Difference]: Without dead ends: 207 [2020-09-17 02:25:07,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:25:07,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-17 02:25:07,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 158. [2020-09-17 02:25:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-17 02:25:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-17 02:25:07,020 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-17 02:25:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:07,020 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-17 02:25:07,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-17 02:25:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:07,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:07,021 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:07,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-09-17 02:25:07,231 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:07,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:07,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 128 times [2020-09-17 02:25:07,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:07,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216597358] [2020-09-17 02:25:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:07,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216597358] [2020-09-17 02:25:07,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279964722] [2020-09-17 02:25:07,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:07,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:25:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:07,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:07,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:07,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:07,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:07,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514519711] [2020-09-17 02:25:07,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:07,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:07,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:07,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:07,776 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-17 02:25:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:07,884 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-17 02:25:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:25:07,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:07,887 INFO L225 Difference]: With dead ends: 212 [2020-09-17 02:25:07,887 INFO L226 Difference]: Without dead ends: 210 [2020-09-17 02:25:07,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:25:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-17 02:25:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-17 02:25:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:25:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-17 02:25:07,891 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-17 02:25:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:07,891 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-17 02:25:07,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-17 02:25:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:07,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:07,892 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:08,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:08,093 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:08,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:08,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 129 times [2020-09-17 02:25:08,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:08,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697117333] [2020-09-17 02:25:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:08,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697117333] [2020-09-17 02:25:08,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214702107] [2020-09-17 02:25:08,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:08,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:25:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:08,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:08,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:08,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235941358] [2020-09-17 02:25:08,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:08,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:08,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:08,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:08,619 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-17 02:25:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:08,778 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-17 02:25:08,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:25:08,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:08,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:08,779 INFO L225 Difference]: With dead ends: 217 [2020-09-17 02:25:08,779 INFO L226 Difference]: Without dead ends: 215 [2020-09-17 02:25:08,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:25:08,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-17 02:25:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-17 02:25:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:25:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-17 02:25:08,782 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-17 02:25:08,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:08,782 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-17 02:25:08,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-17 02:25:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:08,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:08,783 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:08,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:08,984 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:08,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 130 times [2020-09-17 02:25:08,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:08,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061220436] [2020-09-17 02:25:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:09,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061220436] [2020-09-17 02:25:09,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913229623] [2020-09-17 02:25:09,191 INFO L93 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:09,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:25:09,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:09,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:09,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:09,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:09,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022626254] [2020-09-17 02:25:09,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:09,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:09,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:09,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:09,513 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-17 02:25:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:09,812 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-17 02:25:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:25:09,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:09,814 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:25:09,814 INFO L226 Difference]: Without dead ends: 225 [2020-09-17 02:25:09,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:25:09,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-17 02:25:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-17 02:25:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:25:09,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-17 02:25:09,817 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-17 02:25:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:09,817 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-17 02:25:09,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:09,818 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-17 02:25:09,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:09,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:09,818 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:10,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:10,019 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:10,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 131 times [2020-09-17 02:25:10,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:10,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867453079] [2020-09-17 02:25:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:10,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867453079] [2020-09-17 02:25:10,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235356940] [2020-09-17 02:25:10,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:10,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:25:10,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:10,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:10,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:12,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:12,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:12,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814596062] [2020-09-17 02:25:12,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:12,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:12,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:12,224 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-17 02:25:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:12,600 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-17 02:25:12,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:12,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:12,602 INFO L225 Difference]: With dead ends: 225 [2020-09-17 02:25:12,602 INFO L226 Difference]: Without dead ends: 223 [2020-09-17 02:25:12,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:25:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-17 02:25:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 164. [2020-09-17 02:25:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:25:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-17 02:25:12,606 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-17 02:25:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:12,606 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-17 02:25:12,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-17 02:25:12,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:12,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:12,606 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:12,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-09-17 02:25:12,807 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 132 times [2020-09-17 02:25:12,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:12,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400569949] [2020-09-17 02:25:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:12,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400569949] [2020-09-17 02:25:12,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31554462] [2020-09-17 02:25:12,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:13,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:25:13,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:13,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:17,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:17,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:17,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783150222] [2020-09-17 02:25:17,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:17,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:17,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:17,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:25:17,044 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-17 02:25:21,247 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:25:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:21,504 INFO L93 Difference]: Finished difference Result 233 states and 545 transitions. [2020-09-17 02:25:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:25:21,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:21,506 INFO L225 Difference]: With dead ends: 233 [2020-09-17 02:25:21,506 INFO L226 Difference]: Without dead ends: 231 [2020-09-17 02:25:21,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=146, Invalid=359, Unknown=1, NotChecked=0, Total=506 [2020-09-17 02:25:21,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-17 02:25:21,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-17 02:25:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-17 02:25:21,511 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-17 02:25:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:21,511 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-17 02:25:21,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:21,512 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-17 02:25:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:21,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:21,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:21,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:21,714 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:21,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 133 times [2020-09-17 02:25:21,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:21,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448065684] [2020-09-17 02:25:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:21,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448065684] [2020-09-17 02:25:21,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760524434] [2020-09-17 02:25:21,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:21,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:22,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:22,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:22,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018717440] [2020-09-17 02:25:22,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:22,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:22,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:22,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:22,277 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-17 02:25:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:22,689 INFO L93 Difference]: Finished difference Result 225 states and 533 transitions. [2020-09-17 02:25:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:25:22,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:22,691 INFO L225 Difference]: With dead ends: 225 [2020-09-17 02:25:22,691 INFO L226 Difference]: Without dead ends: 223 [2020-09-17 02:25:22,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:25:22,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-17 02:25:22,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2020-09-17 02:25:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:25:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-17 02:25:22,695 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-17 02:25:22,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:22,695 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-17 02:25:22,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-17 02:25:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:22,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:22,696 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:22,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-17 02:25:22,897 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 134 times [2020-09-17 02:25:22,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:22,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889095698] [2020-09-17 02:25:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:23,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889095698] [2020-09-17 02:25:23,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635676405] [2020-09-17 02:25:23,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:23,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:25:23,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:23,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:23,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:23,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:23,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:23,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942192587] [2020-09-17 02:25:23,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:23,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:23,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:23,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:23,331 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-17 02:25:23,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:23,750 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-17 02:25:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:25:23,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:23,752 INFO L225 Difference]: With dead ends: 225 [2020-09-17 02:25:23,752 INFO L226 Difference]: Without dead ends: 223 [2020-09-17 02:25:23,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:25:23,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-17 02:25:23,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-17 02:25:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-17 02:25:23,756 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-17 02:25:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:23,756 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-17 02:25:23,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-17 02:25:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:23,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:23,756 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:23,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:23,957 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:23,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 135 times [2020-09-17 02:25:23,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:23,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632584392] [2020-09-17 02:25:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:24,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632584392] [2020-09-17 02:25:24,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852662614] [2020-09-17 02:25:24,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:24,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:25:24,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:24,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:24,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:24,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:24,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598349630] [2020-09-17 02:25:24,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:24,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:24,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:24,411 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-17 02:25:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:24,875 INFO L93 Difference]: Finished difference Result 235 states and 549 transitions. [2020-09-17 02:25:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:24,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:24,877 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:25:24,877 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:25:24,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:25:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:25:24,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-17 02:25:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-17 02:25:24,881 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-17 02:25:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:24,881 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-17 02:25:24,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-17 02:25:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:24,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:24,882 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:25,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-17 02:25:25,083 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:25,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 136 times [2020-09-17 02:25:25,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:25,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701485475] [2020-09-17 02:25:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:25,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701485475] [2020-09-17 02:25:25,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679184472] [2020-09-17 02:25:25,246 INFO L93 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:25,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:25:25,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:25,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:25,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:25,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:25,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:25,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379582983] [2020-09-17 02:25:25,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:25,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:25,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:25,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:25,516 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-17 02:25:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:25,948 INFO L93 Difference]: Finished difference Result 230 states and 542 transitions. [2020-09-17 02:25:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:25,949 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:25,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:25,950 INFO L225 Difference]: With dead ends: 230 [2020-09-17 02:25:25,950 INFO L226 Difference]: Without dead ends: 228 [2020-09-17 02:25:25,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:25:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-17 02:25:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 163. [2020-09-17 02:25:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-17 02:25:25,954 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-17 02:25:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:25,954 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-17 02:25:25,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-17 02:25:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:25,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:25,955 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:26,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-17 02:25:26,164 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:26,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:26,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 137 times [2020-09-17 02:25:26,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:26,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124897227] [2020-09-17 02:25:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:26,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124897227] [2020-09-17 02:25:26,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042652576] [2020-09-17 02:25:26,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:26,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:25:26,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:26,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:26,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:26,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:26,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:26,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831734934] [2020-09-17 02:25:26,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:26,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:26,595 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-17 02:25:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:26,899 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-09-17 02:25:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:26,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:26,901 INFO L225 Difference]: With dead ends: 218 [2020-09-17 02:25:26,901 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:25:26,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:25:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:25:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-09-17 02:25:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-17 02:25:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-09-17 02:25:26,904 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-09-17 02:25:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:26,905 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-09-17 02:25:26,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-09-17 02:25:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:26,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:26,906 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:27,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:27,113 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:27,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:27,114 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 138 times [2020-09-17 02:25:27,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:27,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826533452] [2020-09-17 02:25:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:27,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826533452] [2020-09-17 02:25:27,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014479517] [2020-09-17 02:25:27,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:27,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:25:27,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:27,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:27,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:27,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:27,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114589520] [2020-09-17 02:25:27,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:27,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:27,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:27,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:27,614 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-09-17 02:25:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:27,765 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-09-17 02:25:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:25:27,767 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:27,768 INFO L225 Difference]: With dead ends: 208 [2020-09-17 02:25:27,768 INFO L226 Difference]: Without dead ends: 206 [2020-09-17 02:25:27,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:25:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-17 02:25:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-09-17 02:25:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:25:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-09-17 02:25:27,771 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-09-17 02:25:27,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:27,771 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-09-17 02:25:27,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:27,772 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-09-17 02:25:27,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:27,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:27,772 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:27,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:27,973 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:27,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:27,973 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 139 times [2020-09-17 02:25:27,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:27,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150056756] [2020-09-17 02:25:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:28,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150056756] [2020-09-17 02:25:28,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685674482] [2020-09-17 02:25:28,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:28,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:28,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:28,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:28,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563151197] [2020-09-17 02:25:28,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:28,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:28,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:28,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:28,461 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-09-17 02:25:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:28,646 INFO L93 Difference]: Finished difference Result 213 states and 504 transitions. [2020-09-17 02:25:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:25:28,648 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:28,648 INFO L225 Difference]: With dead ends: 213 [2020-09-17 02:25:28,648 INFO L226 Difference]: Without dead ends: 211 [2020-09-17 02:25:28,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:25:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-17 02:25:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2020-09-17 02:25:28,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-17 02:25:28,652 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-17 02:25:28,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:28,652 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-17 02:25:28,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:28,652 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-17 02:25:28,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:28,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:28,653 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:28,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-17 02:25:28,854 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 140 times [2020-09-17 02:25:28,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:28,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948699483] [2020-09-17 02:25:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:29,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948699483] [2020-09-17 02:25:29,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408483031] [2020-09-17 02:25:29,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:29,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:25:29,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:29,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:29,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:29,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:29,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852717927] [2020-09-17 02:25:29,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:29,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:29,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:29,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:29,383 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-17 02:25:29,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:29,822 INFO L93 Difference]: Finished difference Result 223 states and 524 transitions. [2020-09-17 02:25:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:29,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:29,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:29,824 INFO L225 Difference]: With dead ends: 223 [2020-09-17 02:25:29,824 INFO L226 Difference]: Without dead ends: 221 [2020-09-17 02:25:29,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:25:29,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-17 02:25:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 161. [2020-09-17 02:25:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-17 02:25:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-09-17 02:25:29,829 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-09-17 02:25:29,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:29,830 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-09-17 02:25:29,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:29,830 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-09-17 02:25:29,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:29,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:29,831 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:30,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:30,031 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:30,032 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 141 times [2020-09-17 02:25:30,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:30,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727783225] [2020-09-17 02:25:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:30,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727783225] [2020-09-17 02:25:30,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984839224] [2020-09-17 02:25:30,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:30,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:25:30,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:30,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:30,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:32,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:32,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:32,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332308270] [2020-09-17 02:25:32,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:32,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:32,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:32,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:32,647 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-09-17 02:25:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:33,066 INFO L93 Difference]: Finished difference Result 221 states and 520 transitions. [2020-09-17 02:25:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:25:33,067 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:33,068 INFO L225 Difference]: With dead ends: 221 [2020-09-17 02:25:33,068 INFO L226 Difference]: Without dead ends: 219 [2020-09-17 02:25:33,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:25:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-17 02:25:33,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 163. [2020-09-17 02:25:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-17 02:25:33,072 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-17 02:25:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:33,072 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-17 02:25:33,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-17 02:25:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:33,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:33,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:33,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:33,273 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:33,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:33,274 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 142 times [2020-09-17 02:25:33,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:33,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258271846] [2020-09-17 02:25:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:33,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258271846] [2020-09-17 02:25:33,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628152693] [2020-09-17 02:25:33,435 INFO L93 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:33,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:25:33,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:33,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:33,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:37,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:37,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:37,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073245926] [2020-09-17 02:25:37,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:37,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:37,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:37,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:25:37,419 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-17 02:25:41,693 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:25:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:41,957 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-09-17 02:25:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:25:41,959 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:41,959 INFO L225 Difference]: With dead ends: 229 [2020-09-17 02:25:41,960 INFO L226 Difference]: Without dead ends: 227 [2020-09-17 02:25:41,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=149, Invalid=402, Unknown=1, NotChecked=0, Total=552 [2020-09-17 02:25:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-17 02:25:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-09-17 02:25:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-09-17 02:25:41,964 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-09-17 02:25:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:41,964 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-09-17 02:25:41,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-09-17 02:25:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:41,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:41,965 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:42,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:42,168 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:42,169 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 143 times [2020-09-17 02:25:42,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:42,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274029354] [2020-09-17 02:25:42,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:42,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274029354] [2020-09-17 02:25:42,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831761480] [2020-09-17 02:25:42,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:42,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:25:42,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:42,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:42,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:42,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:42,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532940369] [2020-09-17 02:25:42,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:42,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:42,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:42,668 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-09-17 02:25:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:43,127 INFO L93 Difference]: Finished difference Result 221 states and 524 transitions. [2020-09-17 02:25:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:25:43,129 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:43,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:43,129 INFO L225 Difference]: With dead ends: 221 [2020-09-17 02:25:43,129 INFO L226 Difference]: Without dead ends: 219 [2020-09-17 02:25:43,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:25:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-17 02:25:43,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 160. [2020-09-17 02:25:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:25:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-09-17 02:25:43,133 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-09-17 02:25:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:43,133 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-09-17 02:25:43,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:43,133 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-09-17 02:25:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:43,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:43,134 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:43,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2020-09-17 02:25:43,335 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:43,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:43,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 144 times [2020-09-17 02:25:43,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:43,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369962804] [2020-09-17 02:25:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:43,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369962804] [2020-09-17 02:25:43,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201260537] [2020-09-17 02:25:43,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:43,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:25:43,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:43,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:43,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:43,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:43,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:43,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691015959] [2020-09-17 02:25:43,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:43,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:43,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:43,799 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-09-17 02:25:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:43,972 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-09-17 02:25:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:25:43,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:43,974 INFO L225 Difference]: With dead ends: 204 [2020-09-17 02:25:43,974 INFO L226 Difference]: Without dead ends: 202 [2020-09-17 02:25:43,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:25:43,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-17 02:25:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-09-17 02:25:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:25:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-09-17 02:25:43,977 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-09-17 02:25:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:43,977 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-09-17 02:25:43,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-09-17 02:25:43,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:43,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:43,978 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:44,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:44,179 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:44,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 145 times [2020-09-17 02:25:44,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:44,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756930510] [2020-09-17 02:25:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:44,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756930510] [2020-09-17 02:25:44,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862187793] [2020-09-17 02:25:44,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:44,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:44,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:44,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:44,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209874916] [2020-09-17 02:25:44,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:44,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:44,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:44,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:44,631 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-09-17 02:25:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:44,869 INFO L93 Difference]: Finished difference Result 209 states and 495 transitions. [2020-09-17 02:25:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:44,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:44,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:44,871 INFO L225 Difference]: With dead ends: 209 [2020-09-17 02:25:44,871 INFO L226 Difference]: Without dead ends: 207 [2020-09-17 02:25:44,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:25:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-17 02:25:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2020-09-17 02:25:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:25:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-09-17 02:25:44,874 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-09-17 02:25:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:44,874 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-09-17 02:25:44,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-09-17 02:25:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:44,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:44,875 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:45,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-17 02:25:45,076 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 146 times [2020-09-17 02:25:45,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:45,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424076336] [2020-09-17 02:25:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:45,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424076336] [2020-09-17 02:25:45,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028936747] [2020-09-17 02:25:45,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:45,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:25:45,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:45,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:45,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:45,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:45,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:45,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924898690] [2020-09-17 02:25:45,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:45,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:45,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:45,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:45,556 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-09-17 02:25:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:45,932 INFO L93 Difference]: Finished difference Result 219 states and 515 transitions. [2020-09-17 02:25:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:25:45,933 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:45,934 INFO L225 Difference]: With dead ends: 219 [2020-09-17 02:25:45,934 INFO L226 Difference]: Without dead ends: 217 [2020-09-17 02:25:45,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:25:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-17 02:25:45,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-09-17 02:25:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-17 02:25:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-09-17 02:25:45,937 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-09-17 02:25:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:45,937 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-09-17 02:25:45,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-09-17 02:25:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:45,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:45,938 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:46,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-17 02:25:46,139 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:46,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:46,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 147 times [2020-09-17 02:25:46,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:46,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010148188] [2020-09-17 02:25:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:46,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010148188] [2020-09-17 02:25:46,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236948855] [2020-09-17 02:25:46,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:46,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:25:46,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:46,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:46,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:46,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:46,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:46,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779832315] [2020-09-17 02:25:46,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:46,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:46,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:46,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:46,616 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-09-17 02:25:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:46,889 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-09-17 02:25:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:25:46,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:46,892 INFO L225 Difference]: With dead ends: 200 [2020-09-17 02:25:46,892 INFO L226 Difference]: Without dead ends: 198 [2020-09-17 02:25:46,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:25:46,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-09-17 02:25:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-09-17 02:25:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:25:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-09-17 02:25:46,896 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-09-17 02:25:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:46,896 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-09-17 02:25:46,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-09-17 02:25:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:46,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:46,897 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:47,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:47,098 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:47,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 148 times [2020-09-17 02:25:47,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:47,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103070564] [2020-09-17 02:25:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:47,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103070564] [2020-09-17 02:25:47,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618093115] [2020-09-17 02:25:47,258 INFO L93 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:47,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:25:47,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:47,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:47,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:47,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139574590] [2020-09-17 02:25:47,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:47,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:47,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:47,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:47,539 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-09-17 02:25:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:47,847 INFO L93 Difference]: Finished difference Result 205 states and 486 transitions. [2020-09-17 02:25:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:25:47,848 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:47,849 INFO L225 Difference]: With dead ends: 205 [2020-09-17 02:25:47,849 INFO L226 Difference]: Without dead ends: 203 [2020-09-17 02:25:47,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:25:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-17 02:25:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 162. [2020-09-17 02:25:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:25:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-09-17 02:25:47,853 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-09-17 02:25:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:47,853 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-09-17 02:25:47,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-09-17 02:25:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:47,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:47,854 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:48,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-17 02:25:48,054 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:48,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:48,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 149 times [2020-09-17 02:25:48,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:48,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119175418] [2020-09-17 02:25:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:48,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119175418] [2020-09-17 02:25:48,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194081925] [2020-09-17 02:25:48,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:48,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:25:48,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:48,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:48,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:48,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:48,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345664326] [2020-09-17 02:25:48,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:48,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:48,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:48,478 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 17 states. [2020-09-17 02:25:48,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:48,775 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-09-17 02:25:48,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:25:48,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:48,778 INFO L225 Difference]: With dead ends: 201 [2020-09-17 02:25:48,778 INFO L226 Difference]: Without dead ends: 199 [2020-09-17 02:25:48,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:25:48,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-17 02:25:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-09-17 02:25:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:25:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-17 02:25:48,781 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-17 02:25:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:48,781 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-17 02:25:48,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:48,782 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-17 02:25:48,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:48,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:48,783 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:48,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:48,991 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:48,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:48,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 150 times [2020-09-17 02:25:48,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:48,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349445424] [2020-09-17 02:25:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:49,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349445424] [2020-09-17 02:25:49,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669215759] [2020-09-17 02:25:49,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:49,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:25:49,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:49,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:25:49,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:49,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:49,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:25:49,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970503539] [2020-09-17 02:25:49,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:25:49,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:49,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:25:49,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:25:49,228 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 11 states. [2020-09-17 02:25:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:49,547 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-09-17 02:25:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:49,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:25:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:49,550 INFO L225 Difference]: With dead ends: 226 [2020-09-17 02:25:49,550 INFO L226 Difference]: Without dead ends: 221 [2020-09-17 02:25:49,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:25:49,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-17 02:25:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-09-17 02:25:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:25:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-17 02:25:49,554 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-17 02:25:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:49,554 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-17 02:25:49,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:25:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-17 02:25:49,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:49,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:49,554 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:49,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2020-09-17 02:25:49,755 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:49,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 151 times [2020-09-17 02:25:49,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:49,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237273941] [2020-09-17 02:25:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:49,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237273941] [2020-09-17 02:25:49,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437658149] [2020-09-17 02:25:49,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:49,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:49,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:50,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:50,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:50,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182646756] [2020-09-17 02:25:50,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:50,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:50,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:50,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:50,209 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-17 02:25:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:50,762 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-17 02:25:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:25:50,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:50,763 INFO L225 Difference]: With dead ends: 218 [2020-09-17 02:25:50,763 INFO L226 Difference]: Without dead ends: 216 [2020-09-17 02:25:50,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:25:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-17 02:25:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-09-17 02:25:50,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:25:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-17 02:25:50,767 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-17 02:25:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:50,767 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-17 02:25:50,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-17 02:25:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:50,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:50,768 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:50,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:50,968 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:50,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:50,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 152 times [2020-09-17 02:25:50,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:50,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503176393] [2020-09-17 02:25:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:51,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503176393] [2020-09-17 02:25:51,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72460765] [2020-09-17 02:25:51,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:51,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:25:51,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:51,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:51,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:51,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:25:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:51,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:51,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:51,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809994203] [2020-09-17 02:25:51,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:51,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:51,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:51,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:51,429 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-17 02:25:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:52,309 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-09-17 02:25:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:25:52,311 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:52,311 INFO L225 Difference]: With dead ends: 248 [2020-09-17 02:25:52,312 INFO L226 Difference]: Without dead ends: 243 [2020-09-17 02:25:52,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:25:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-17 02:25:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-09-17 02:25:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:25:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-17 02:25:52,315 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-17 02:25:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:52,315 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-17 02:25:52,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-17 02:25:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:52,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:52,316 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:52,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:52,517 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:52,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:52,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 153 times [2020-09-17 02:25:52,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:52,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090262576] [2020-09-17 02:25:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:52,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090262576] [2020-09-17 02:25:52,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67176644] [2020-09-17 02:25:52,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:52,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:25:52,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:52,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:25:52,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:52,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:52,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-09-17 02:25:52,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624075489] [2020-09-17 02:25:52,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:25:52,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:52,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:25:52,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:25:52,832 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 13 states. [2020-09-17 02:25:53,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:53,263 INFO L93 Difference]: Finished difference Result 246 states and 583 transitions. [2020-09-17 02:25:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:25:53,265 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-09-17 02:25:53,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:53,265 INFO L225 Difference]: With dead ends: 246 [2020-09-17 02:25:53,265 INFO L226 Difference]: Without dead ends: 241 [2020-09-17 02:25:53,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:25:53,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-17 02:25:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 162. [2020-09-17 02:25:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:25:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-17 02:25:53,268 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-17 02:25:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:53,268 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-17 02:25:53,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:25:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-17 02:25:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:53,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:53,269 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:53,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:53,470 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:53,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:53,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 154 times [2020-09-17 02:25:53,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:53,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916416521] [2020-09-17 02:25:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:53,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916416521] [2020-09-17 02:25:53,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580210674] [2020-09-17 02:25:53,616 INFO L93 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:53,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:25:53,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:53,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:53,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:53,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:53,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:53,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237781196] [2020-09-17 02:25:53,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:53,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:53,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:53,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:53,963 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-17 02:25:54,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:54,680 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-09-17 02:25:54,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:25:54,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:54,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:54,682 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:25:54,683 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:25:54,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:25:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:25:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-09-17 02:25:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:25:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-17 02:25:54,688 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-17 02:25:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:54,688 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-17 02:25:54,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:54,688 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-17 02:25:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:54,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:54,689 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:54,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:54,898 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:54,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 155 times [2020-09-17 02:25:54,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:54,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518360948] [2020-09-17 02:25:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:55,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518360948] [2020-09-17 02:25:55,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055279242] [2020-09-17 02:25:55,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:55,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:25:55,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:55,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:55,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:55,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:55,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268287133] [2020-09-17 02:25:55,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:55,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:55,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:55,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:55,465 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-17 02:25:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:56,282 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-09-17 02:25:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:25:56,283 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:56,284 INFO L225 Difference]: With dead ends: 252 [2020-09-17 02:25:56,284 INFO L226 Difference]: Without dead ends: 250 [2020-09-17 02:25:56,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:25:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-17 02:25:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-09-17 02:25:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:25:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-17 02:25:56,287 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-17 02:25:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:56,287 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-17 02:25:56,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-17 02:25:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:56,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:56,287 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:56,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-17 02:25:56,488 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:56,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:56,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 156 times [2020-09-17 02:25:56,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:56,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298178361] [2020-09-17 02:25:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:56,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298178361] [2020-09-17 02:25:56,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720504954] [2020-09-17 02:25:56,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:56,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:25:56,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:25:56,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:56,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:25:56,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:25:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:56,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:25:56,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:25:56,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907327059] [2020-09-17 02:25:56,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:25:56,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:25:56,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:25:56,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:25:56,965 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-17 02:25:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:25:57,991 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-09-17 02:25:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:25:57,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:25:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:25:57,993 INFO L225 Difference]: With dead ends: 258 [2020-09-17 02:25:57,993 INFO L226 Difference]: Without dead ends: 253 [2020-09-17 02:25:57,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:25:57,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-17 02:25:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-17 02:25:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:25:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-17 02:25:57,997 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-17 02:25:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:25:57,997 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-17 02:25:57,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:25:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-17 02:25:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:25:57,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:25:57,998 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:25:58,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-17 02:25:58,198 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:25:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:25:58,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 157 times [2020-09-17 02:25:58,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:25:58,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934112859] [2020-09-17 02:25:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:25:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:58,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:25:58,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934112859] [2020-09-17 02:25:58,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448849487] [2020-09-17 02:25:58,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:25:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:25:58,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:25:58,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:00,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:26:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:00,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:00,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:00,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590500943] [2020-09-17 02:26:00,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:00,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:00,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:00,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:26:00,702 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-17 02:26:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:12,172 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-09-17 02:26:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:26:12,173 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:12,174 INFO L225 Difference]: With dead ends: 287 [2020-09-17 02:26:12,174 INFO L226 Difference]: Without dead ends: 279 [2020-09-17 02:26:12,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=381, Invalid=873, Unknown=6, NotChecked=0, Total=1260 [2020-09-17 02:26:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-09-17 02:26:12,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-09-17 02:26:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:26:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-09-17 02:26:12,178 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-09-17 02:26:12,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:12,179 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-09-17 02:26:12,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:12,179 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-09-17 02:26:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:12,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:12,180 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:12,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-09-17 02:26:12,380 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:12,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 158 times [2020-09-17 02:26:12,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:12,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934812867] [2020-09-17 02:26:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:12,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934812867] [2020-09-17 02:26:12,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120448035] [2020-09-17 02:26:12,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:12,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:26:12,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:12,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:12,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:12,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:26:12,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:26:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:12,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:12,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:12,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352609419] [2020-09-17 02:26:12,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:12,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:12,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:12,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:12,975 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-09-17 02:26:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:14,072 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-09-17 02:26:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:26:14,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:14,073 INFO L225 Difference]: With dead ends: 260 [2020-09-17 02:26:14,074 INFO L226 Difference]: Without dead ends: 255 [2020-09-17 02:26:14,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:26:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-17 02:26:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-09-17 02:26:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:26:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-09-17 02:26:14,078 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-09-17 02:26:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:14,078 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-09-17 02:26:14,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-09-17 02:26:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:14,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:14,079 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:14,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:14,282 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:14,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 159 times [2020-09-17 02:26:14,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:14,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107697234] [2020-09-17 02:26:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:14,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107697234] [2020-09-17 02:26:14,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646779701] [2020-09-17 02:26:14,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:14,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:26:14,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:14,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:14,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:17,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:17,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:17,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848458511] [2020-09-17 02:26:17,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:17,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:17,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:17,062 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-09-17 02:26:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:17,699 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-09-17 02:26:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:26:17,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:17,701 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:26:17,701 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:26:17,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:26:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:26:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-17 02:26:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:26:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-09-17 02:26:17,705 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-09-17 02:26:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:17,705 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-09-17 02:26:17,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-09-17 02:26:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:17,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:17,705 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:17,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:17,906 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:17,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 160 times [2020-09-17 02:26:17,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:17,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191803235] [2020-09-17 02:26:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:18,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191803235] [2020-09-17 02:26:18,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302327358] [2020-09-17 02:26:18,050 INFO L93 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:18,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:26:18,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:18,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:18,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:22,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:22,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:22,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059637898] [2020-09-17 02:26:22,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:22,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:22,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:22,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:26:22,001 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-09-17 02:26:26,402 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:26:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:32,902 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-09-17 02:26:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:26:32,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:32,904 INFO L225 Difference]: With dead ends: 241 [2020-09-17 02:26:32,904 INFO L226 Difference]: Without dead ends: 239 [2020-09-17 02:26:32,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=203, Invalid=552, Unknown=1, NotChecked=0, Total=756 [2020-09-17 02:26:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-17 02:26:32,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-17 02:26:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:26:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-09-17 02:26:32,907 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-09-17 02:26:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:32,907 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-09-17 02:26:32,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-09-17 02:26:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:32,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:32,908 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:33,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-17 02:26:33,109 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 161 times [2020-09-17 02:26:33,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:33,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546486988] [2020-09-17 02:26:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:33,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546486988] [2020-09-17 02:26:33,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198608581] [2020-09-17 02:26:33,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:33,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:26:33,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:33,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:33,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:33,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:33,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:33,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704121239] [2020-09-17 02:26:33,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:33,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:33,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:33,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:33,674 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-09-17 02:26:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:34,364 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-09-17 02:26:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:26:34,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:34,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:34,367 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:26:34,367 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:26:34,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:26:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:26:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-17 02:26:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:26:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-17 02:26:34,370 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-17 02:26:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:34,371 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-17 02:26:34,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-17 02:26:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:34,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:34,371 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:34,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:34,572 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:34,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 162 times [2020-09-17 02:26:34,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:34,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012682745] [2020-09-17 02:26:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:34,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012682745] [2020-09-17 02:26:34,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609534673] [2020-09-17 02:26:34,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:34,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:26:34,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:34,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:35,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:35,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:35,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424352487] [2020-09-17 02:26:35,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:35,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:35,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:35,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:35,940 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-17 02:26:36,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:36,920 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-09-17 02:26:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:26:36,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:36,921 INFO L225 Difference]: With dead ends: 254 [2020-09-17 02:26:36,921 INFO L226 Difference]: Without dead ends: 252 [2020-09-17 02:26:36,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:26:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-17 02:26:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-09-17 02:26:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:26:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-09-17 02:26:36,925 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-09-17 02:26:36,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:36,925 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-09-17 02:26:36,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:36,926 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-09-17 02:26:36,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:36,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:36,926 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:37,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:37,127 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:37,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:37,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 163 times [2020-09-17 02:26:37,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:37,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570653263] [2020-09-17 02:26:37,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:37,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570653263] [2020-09-17 02:26:37,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378883756] [2020-09-17 02:26:37,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:37,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:37,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:26:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:38,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:26:38,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:26:38,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703007780] [2020-09-17 02:26:38,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:26:38,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:26:38,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:26:38,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:26:38,810 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-09-17 02:26:43,340 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:26:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:26:58,206 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-09-17 02:26:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:26:58,208 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:26:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:26:58,209 INFO L225 Difference]: With dead ends: 264 [2020-09-17 02:26:58,209 INFO L226 Difference]: Without dead ends: 262 [2020-09-17 02:26:58,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=302, Invalid=750, Unknown=4, NotChecked=0, Total=1056 [2020-09-17 02:26:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-17 02:26:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-09-17 02:26:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:26:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-17 02:26:58,213 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-17 02:26:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:26:58,213 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-17 02:26:58,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:26:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-17 02:26:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:26:58,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:26:58,214 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:26:58,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:58,415 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:26:58,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:26:58,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 164 times [2020-09-17 02:26:58,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:26:58,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165313000] [2020-09-17 02:26:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:26:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:26:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:26:58,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165313000] [2020-09-17 02:26:58,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242088504] [2020-09-17 02:26:58,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:26:58,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:26:58,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:26:58,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:26:58,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:00,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:00,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:00,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292655138] [2020-09-17 02:27:00,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:00,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:00,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:27:00,138 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-17 02:27:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:01,139 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-09-17 02:27:01,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:27:01,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:01,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:01,141 INFO L225 Difference]: With dead ends: 255 [2020-09-17 02:27:01,141 INFO L226 Difference]: Without dead ends: 253 [2020-09-17 02:27:01,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:27:01,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-17 02:27:01,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-17 02:27:01,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:27:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-17 02:27:01,145 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-17 02:27:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:01,145 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-17 02:27:01,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-17 02:27:01,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:01,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:01,145 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:01,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:01,346 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:01,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 165 times [2020-09-17 02:27:01,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:01,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768916922] [2020-09-17 02:27:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:01,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768916922] [2020-09-17 02:27:01,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320396075] [2020-09-17 02:27:01,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:01,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:27:01,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:27:01,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:01,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:01,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:27:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:01,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:01,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:01,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874239707] [2020-09-17 02:27:01,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:01,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:01,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:01,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:27:01,870 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-17 02:27:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:03,127 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-09-17 02:27:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:27:03,128 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:03,129 INFO L225 Difference]: With dead ends: 256 [2020-09-17 02:27:03,129 INFO L226 Difference]: Without dead ends: 251 [2020-09-17 02:27:03,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=429, Invalid=903, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:27:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-17 02:27:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-09-17 02:27:03,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:27:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-17 02:27:03,132 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-17 02:27:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:03,132 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-17 02:27:03,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-17 02:27:03,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:03,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:03,133 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:03,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:03,334 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:03,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:03,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 166 times [2020-09-17 02:27:03,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:03,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622136017] [2020-09-17 02:27:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:03,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622136017] [2020-09-17 02:27:03,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854008795] [2020-09-17 02:27:03,491 INFO L93 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:03,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:27:03,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:27:03,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:03,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:03,805 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:03,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:03,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:03,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:03,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:03,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:03,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:03,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:03,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:03,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:03,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328916095] [2020-09-17 02:27:03,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:03,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:03,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:03,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:27:03,894 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-17 02:27:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:05,376 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-09-17 02:27:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:27:05,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:05,379 INFO L225 Difference]: With dead ends: 279 [2020-09-17 02:27:05,379 INFO L226 Difference]: Without dead ends: 274 [2020-09-17 02:27:05,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:27:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-17 02:27:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-09-17 02:27:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:27:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-17 02:27:05,382 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-17 02:27:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:05,383 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-17 02:27:05,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-17 02:27:05,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:05,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:05,383 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:05,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-17 02:27:05,584 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:05,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 167 times [2020-09-17 02:27:05,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:05,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215157864] [2020-09-17 02:27:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:05,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215157864] [2020-09-17 02:27:05,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118091868] [2020-09-17 02:27:05,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:05,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:27:05,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:27:05,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:05,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:08,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:08,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:08,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114763174] [2020-09-17 02:27:08,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:08,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:08,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:08,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=198, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:27:08,218 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-17 02:27:12,700 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-17 02:27:16,981 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:27:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:17,733 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-09-17 02:27:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:27:17,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:17,736 INFO L225 Difference]: With dead ends: 271 [2020-09-17 02:27:17,736 INFO L226 Difference]: Without dead ends: 269 [2020-09-17 02:27:17,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=362, Invalid=897, Unknown=1, NotChecked=0, Total=1260 [2020-09-17 02:27:17,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-17 02:27:17,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-09-17 02:27:17,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:27:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-17 02:27:17,741 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-17 02:27:17,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:17,741 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-17 02:27:17,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:17,741 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-17 02:27:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:17,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:17,742 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:17,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-17 02:27:17,943 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:17,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 168 times [2020-09-17 02:27:17,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:17,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759145892] [2020-09-17 02:27:17,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:18,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759145892] [2020-09-17 02:27:18,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496218890] [2020-09-17 02:27:18,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:18,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:27:18,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:27:18,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:18,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:21,794 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_70 Int) (v_~i~0_506 Int) (aux_div_38 Int)) (let ((.cse0 (* 2 aux_div_70)) (.cse1 (* 2 aux_div_38))) (and (<= c_~i~0 (+ v_~i~0_506 c_~j~0)) (<= v_~i~0_506 (+ .cse0 .cse1 3)) (<= (+ .cse0 c_~j~0) (* 2 v_~i~0_506)) (<= aux_div_70 1) (<= c_~j~0 (+ v_~i~0_506 .cse1 2)) (<= (+ .cse0 .cse1 1) v_~i~0_506) (<= aux_div_38 1)))) is different from true [2020-09-17 02:27:21,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:27:21,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:27:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:21,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:21,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:21,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426569723] [2020-09-17 02:27:21,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:21,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:21,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:21,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=164, Unknown=2, NotChecked=28, Total=272 [2020-09-17 02:27:21,878 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-17 02:27:22,300 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-09-17 02:27:26,463 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-17 02:27:31,757 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-17 02:27:37,081 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-09-17 02:27:37,264 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-09-17 02:27:38,828 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-09-17 02:27:51,530 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-09-17 02:27:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:53,624 INFO L93 Difference]: Finished difference Result 292 states and 717 transitions. [2020-09-17 02:27:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:27:53,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:53,626 INFO L225 Difference]: With dead ends: 292 [2020-09-17 02:27:53,627 INFO L226 Difference]: Without dead ends: 287 [2020-09-17 02:27:53,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=501, Invalid=1130, Unknown=13, NotChecked=78, Total=1722 [2020-09-17 02:27:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-09-17 02:27:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 168. [2020-09-17 02:27:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-17 02:27:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-09-17 02:27:53,631 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-09-17 02:27:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:53,631 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-09-17 02:27:53,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-09-17 02:27:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:53,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:53,632 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:53,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-17 02:27:53,841 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:53,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:53,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 169 times [2020-09-17 02:27:53,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:53,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838548358] [2020-09-17 02:27:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:54,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838548358] [2020-09-17 02:27:54,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689685161] [2020-09-17 02:27:54,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:54,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:54,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:56,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:27:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:56,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:56,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:56,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689352072] [2020-09-17 02:27:56,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:56,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:56,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:56,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=192, Unknown=1, NotChecked=0, Total=272 [2020-09-17 02:27:56,406 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-09-17 02:27:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:58,407 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-09-17 02:27:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:27:58,408 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:58,409 INFO L225 Difference]: With dead ends: 292 [2020-09-17 02:27:58,409 INFO L226 Difference]: Without dead ends: 284 [2020-09-17 02:27:58,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=441, Invalid=1040, Unknown=1, NotChecked=0, Total=1482 [2020-09-17 02:27:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-17 02:27:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-09-17 02:27:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:27:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-17 02:27:58,412 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-17 02:27:58,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:58,412 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-17 02:27:58,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-17 02:27:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:58,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:58,413 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:27:58,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-09-17 02:27:58,614 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:27:58,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:27:58,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 170 times [2020-09-17 02:27:58,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:27:58,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413749469] [2020-09-17 02:27:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:27:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:27:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:58,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413749469] [2020-09-17 02:27:58,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291618079] [2020-09-17 02:27:58,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:27:58,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:27:58,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:27:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:27:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:27:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:27:59,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:27:59,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:27:59,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81640656] [2020-09-17 02:27:59,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:27:59,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:27:59,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:27:59,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:27:59,174 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-17 02:27:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:27:59,876 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-09-17 02:27:59,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:27:59,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:27:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:27:59,878 INFO L225 Difference]: With dead ends: 231 [2020-09-17 02:27:59,878 INFO L226 Difference]: Without dead ends: 229 [2020-09-17 02:27:59,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:27:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-17 02:27:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-09-17 02:27:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:27:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-17 02:27:59,882 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-17 02:27:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:27:59,882 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-17 02:27:59,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:27:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-17 02:27:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:27:59,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:27:59,883 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:00,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-17 02:28:00,084 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 171 times [2020-09-17 02:28:00,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:00,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330994424] [2020-09-17 02:28:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:00,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330994424] [2020-09-17 02:28:00,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300451791] [2020-09-17 02:28:00,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:00,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:28:00,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:00,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:28:00,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:00,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:00,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:00,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349326112] [2020-09-17 02:28:00,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:00,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:00,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:00,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:00,654 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-17 02:28:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:01,782 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-09-17 02:28:01,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:28:01,783 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:01,784 INFO L225 Difference]: With dead ends: 250 [2020-09-17 02:28:01,784 INFO L226 Difference]: Without dead ends: 248 [2020-09-17 02:28:01,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:28:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-17 02:28:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-09-17 02:28:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:28:01,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-09-17 02:28:01,788 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-09-17 02:28:01,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:01,788 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-09-17 02:28:01,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-09-17 02:28:01,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:01,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:01,789 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:01,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:01,989 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:01,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 172 times [2020-09-17 02:28:01,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:01,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54481474] [2020-09-17 02:28:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:02,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54481474] [2020-09-17 02:28:02,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864796835] [2020-09-17 02:28:02,167 INFO L93 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:02,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:28:02,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:02,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:02,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:02,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:28:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:02,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:02,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:02,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090141061] [2020-09-17 02:28:02,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:02,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:02,518 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-09-17 02:28:04,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:04,187 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-09-17 02:28:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:28:04,189 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:04,190 INFO L225 Difference]: With dead ends: 288 [2020-09-17 02:28:04,190 INFO L226 Difference]: Without dead ends: 283 [2020-09-17 02:28:04,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:28:04,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-17 02:28:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-09-17 02:28:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-17 02:28:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-09-17 02:28:04,193 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-09-17 02:28:04,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:04,193 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-09-17 02:28:04,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-09-17 02:28:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:04,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:04,194 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:04,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-17 02:28:04,395 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 173 times [2020-09-17 02:28:04,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:04,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990676652] [2020-09-17 02:28:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:04,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990676652] [2020-09-17 02:28:04,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527148053] [2020-09-17 02:28:04,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:04,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:28:04,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:04,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:04,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:04,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:04,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:04,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326609235] [2020-09-17 02:28:04,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:04,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:04,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:04,899 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-09-17 02:28:05,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:05,560 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-09-17 02:28:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:28:05,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:05,562 INFO L225 Difference]: With dead ends: 236 [2020-09-17 02:28:05,562 INFO L226 Difference]: Without dead ends: 234 [2020-09-17 02:28:05,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:28:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-17 02:28:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-17 02:28:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:28:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-17 02:28:05,565 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-17 02:28:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:05,566 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-17 02:28:05,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-17 02:28:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:05,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:05,566 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:05,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-09-17 02:28:05,767 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:05,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 174 times [2020-09-17 02:28:05,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:05,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406997157] [2020-09-17 02:28:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:05,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406997157] [2020-09-17 02:28:05,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705213840] [2020-09-17 02:28:05,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:05,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:28:05,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:05,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:05,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:06,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:06,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:06,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051277407] [2020-09-17 02:28:06,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:06,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:06,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:06,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:06,300 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-17 02:28:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:06,988 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-09-17 02:28:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:28:06,990 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:06,991 INFO L225 Difference]: With dead ends: 246 [2020-09-17 02:28:06,991 INFO L226 Difference]: Without dead ends: 244 [2020-09-17 02:28:06,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:28:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-17 02:28:06,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-09-17 02:28:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:28:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-17 02:28:06,994 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-17 02:28:06,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:06,995 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-17 02:28:06,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:06,995 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-17 02:28:06,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:06,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:06,995 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:07,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:07,196 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:07,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:07,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 175 times [2020-09-17 02:28:07,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:07,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033767074] [2020-09-17 02:28:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:07,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033767074] [2020-09-17 02:28:07,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572555565] [2020-09-17 02:28:07,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:07,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:07,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:07,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:07,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:07,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614404228] [2020-09-17 02:28:07,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:07,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:07,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:07,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:07,671 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-17 02:28:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:08,275 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-09-17 02:28:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:28:08,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:08,278 INFO L225 Difference]: With dead ends: 239 [2020-09-17 02:28:08,278 INFO L226 Difference]: Without dead ends: 237 [2020-09-17 02:28:08,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:28:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-17 02:28:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-17 02:28:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:28:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-17 02:28:08,285 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-17 02:28:08,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:08,285 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-17 02:28:08,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-17 02:28:08,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:08,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:08,286 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:08,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:08,487 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:08,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 176 times [2020-09-17 02:28:08,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:08,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408618970] [2020-09-17 02:28:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:08,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408618970] [2020-09-17 02:28:08,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631585316] [2020-09-17 02:28:08,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:08,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:28:08,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:08,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:08,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:08,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:08,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:08,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602454881] [2020-09-17 02:28:08,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:08,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:08,991 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-17 02:28:09,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:09,541 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-09-17 02:28:09,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:28:09,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:09,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:09,542 INFO L225 Difference]: With dead ends: 229 [2020-09-17 02:28:09,542 INFO L226 Difference]: Without dead ends: 227 [2020-09-17 02:28:09,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:28:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-17 02:28:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-17 02:28:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-17 02:28:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-17 02:28:09,546 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-17 02:28:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:09,546 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-17 02:28:09,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-17 02:28:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:09,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:09,547 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:09,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:09,747 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:09,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 177 times [2020-09-17 02:28:09,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:09,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781186922] [2020-09-17 02:28:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:09,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781186922] [2020-09-17 02:28:09,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922900739] [2020-09-17 02:28:09,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:09,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:28:09,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:09,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:10,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:10,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:10,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870006315] [2020-09-17 02:28:10,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:10,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:10,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:10,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:10,235 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-17 02:28:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:11,301 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-09-17 02:28:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:28:11,302 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:11,303 INFO L225 Difference]: With dead ends: 261 [2020-09-17 02:28:11,303 INFO L226 Difference]: Without dead ends: 259 [2020-09-17 02:28:11,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=364, Invalid=968, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:28:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-17 02:28:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-09-17 02:28:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:28:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-09-17 02:28:11,307 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-09-17 02:28:11,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:11,307 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-09-17 02:28:11,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-09-17 02:28:11,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:11,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:11,307 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:11,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:11,508 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 178 times [2020-09-17 02:28:11,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:11,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117328871] [2020-09-17 02:28:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:11,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117328871] [2020-09-17 02:28:11,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303469293] [2020-09-17 02:28:11,672 INFO L93 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:11,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:28:11,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:11,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:11,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:11,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559694626] [2020-09-17 02:28:11,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:11,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:12,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:12,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:12,000 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-09-17 02:28:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:13,050 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-09-17 02:28:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:28:13,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:13,053 INFO L225 Difference]: With dead ends: 271 [2020-09-17 02:28:13,053 INFO L226 Difference]: Without dead ends: 269 [2020-09-17 02:28:13,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:28:13,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-17 02:28:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-09-17 02:28:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:28:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-09-17 02:28:13,057 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-09-17 02:28:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:13,058 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-09-17 02:28:13,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:13,058 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-09-17 02:28:13,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:13,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:13,058 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:13,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-17 02:28:13,261 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:13,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:13,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 179 times [2020-09-17 02:28:13,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:13,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576220816] [2020-09-17 02:28:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:13,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576220816] [2020-09-17 02:28:13,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666683508] [2020-09-17 02:28:13,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:13,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:28:13,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:13,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:13,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:13,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:13,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:13,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637873656] [2020-09-17 02:28:13,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:13,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:13,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:13,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:13,719 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-09-17 02:28:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:14,606 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-09-17 02:28:14,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:28:14,607 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:14,608 INFO L225 Difference]: With dead ends: 253 [2020-09-17 02:28:14,608 INFO L226 Difference]: Without dead ends: 251 [2020-09-17 02:28:14,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:28:14,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-17 02:28:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-09-17 02:28:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:28:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-17 02:28:14,612 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-17 02:28:14,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:14,612 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-17 02:28:14,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-17 02:28:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:14,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:14,613 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:14,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-17 02:28:14,814 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:14,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:14,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 180 times [2020-09-17 02:28:14,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:14,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545400765] [2020-09-17 02:28:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:14,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545400765] [2020-09-17 02:28:14,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015108456] [2020-09-17 02:28:14,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:15,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:28:15,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:15,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:15,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:15,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:15,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:15,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310593837] [2020-09-17 02:28:15,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:15,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:15,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:15,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:15,305 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-17 02:28:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:16,505 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-09-17 02:28:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:28:16,507 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:16,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:16,507 INFO L225 Difference]: With dead ends: 268 [2020-09-17 02:28:16,507 INFO L226 Difference]: Without dead ends: 266 [2020-09-17 02:28:16,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=410, Invalid=996, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:28:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-17 02:28:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-09-17 02:28:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:28:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-17 02:28:16,511 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-17 02:28:16,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:16,511 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-17 02:28:16,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:16,511 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-17 02:28:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:16,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:16,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:16,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-17 02:28:16,713 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:16,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 181 times [2020-09-17 02:28:16,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:16,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817223525] [2020-09-17 02:28:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:16,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817223525] [2020-09-17 02:28:16,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49184098] [2020-09-17 02:28:16,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:16,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:16,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:17,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:17,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:17,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058982285] [2020-09-17 02:28:17,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:17,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:17,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:17,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:17,194 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-17 02:28:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:18,398 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-09-17 02:28:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:28:18,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:18,400 INFO L225 Difference]: With dead ends: 271 [2020-09-17 02:28:18,400 INFO L226 Difference]: Without dead ends: 269 [2020-09-17 02:28:18,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:28:18,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-17 02:28:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-17 02:28:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:28:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-17 02:28:18,404 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-17 02:28:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:18,404 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-17 02:28:18,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-17 02:28:18,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:18,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:18,404 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:18,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2020-09-17 02:28:18,605 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:18,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 182 times [2020-09-17 02:28:18,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:18,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924990073] [2020-09-17 02:28:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:18,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924990073] [2020-09-17 02:28:18,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450091707] [2020-09-17 02:28:18,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:18,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:28:18,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:18,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:18,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:19,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:19,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:19,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45043222] [2020-09-17 02:28:19,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:19,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:19,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:19,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:19,084 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-17 02:28:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:20,267 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-09-17 02:28:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:28:20,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:20,270 INFO L225 Difference]: With dead ends: 262 [2020-09-17 02:28:20,270 INFO L226 Difference]: Without dead ends: 260 [2020-09-17 02:28:20,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:28:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-17 02:28:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-09-17 02:28:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-17 02:28:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-17 02:28:20,274 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-17 02:28:20,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:20,274 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-17 02:28:20,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-17 02:28:20,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:20,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:20,274 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:20,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-17 02:28:20,475 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:20,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:20,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 183 times [2020-09-17 02:28:20,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:20,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147230250] [2020-09-17 02:28:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:20,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147230250] [2020-09-17 02:28:20,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754551651] [2020-09-17 02:28:20,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:20,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:28:20,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:20,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:20,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:28:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:20,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:20,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:20,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98671252] [2020-09-17 02:28:20,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:20,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:20,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:20,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:20,934 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-17 02:28:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:22,040 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-09-17 02:28:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:28:22,042 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:22,042 INFO L225 Difference]: With dead ends: 248 [2020-09-17 02:28:22,042 INFO L226 Difference]: Without dead ends: 243 [2020-09-17 02:28:22,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=474, Invalid=1008, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:28:22,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-17 02:28:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-09-17 02:28:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-17 02:28:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-17 02:28:22,046 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-17 02:28:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:22,047 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-17 02:28:22,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-17 02:28:22,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:22,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:22,047 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:22,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:22,248 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:22,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 184 times [2020-09-17 02:28:22,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:22,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030822526] [2020-09-17 02:28:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:22,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030822526] [2020-09-17 02:28:22,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393329098] [2020-09-17 02:28:22,436 INFO L93 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:22,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:28:22,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:22,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:22,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:22,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:28:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:22,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:22,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:22,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008704533] [2020-09-17 02:28:22,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:22,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:22,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:22,863 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-17 02:28:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:24,368 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-09-17 02:28:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:28:24,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:24,370 INFO L225 Difference]: With dead ends: 287 [2020-09-17 02:28:24,370 INFO L226 Difference]: Without dead ends: 282 [2020-09-17 02:28:24,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=506, Invalid=1216, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:28:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-17 02:28:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-09-17 02:28:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:28:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-17 02:28:24,374 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-17 02:28:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:24,374 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-17 02:28:24,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-17 02:28:24,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:24,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:24,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:24,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-17 02:28:24,575 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:24,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 185 times [2020-09-17 02:28:24,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:24,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400547122] [2020-09-17 02:28:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:24,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400547122] [2020-09-17 02:28:24,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326700685] [2020-09-17 02:28:24,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:24,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:28:24,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:24,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:24,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:25,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:25,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:25,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305076511] [2020-09-17 02:28:25,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:25,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:25,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:25,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:25,075 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-17 02:28:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:26,486 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-09-17 02:28:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:28:26,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:26,489 INFO L225 Difference]: With dead ends: 284 [2020-09-17 02:28:26,489 INFO L226 Difference]: Without dead ends: 282 [2020-09-17 02:28:26,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=439, Invalid=1121, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:28:26,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-17 02:28:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-09-17 02:28:26,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-17 02:28:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-17 02:28:26,493 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-17 02:28:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:26,493 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-17 02:28:26,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-17 02:28:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:26,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:26,494 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:26,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:26,694 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 186 times [2020-09-17 02:28:26,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:26,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674292352] [2020-09-17 02:28:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:26,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674292352] [2020-09-17 02:28:26,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212461459] [2020-09-17 02:28:26,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:26,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:28:26,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:26,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:27,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:28:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:27,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:27,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:27,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689435207] [2020-09-17 02:28:27,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:27,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:27,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:27,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:27,255 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-17 02:28:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:28,832 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-09-17 02:28:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:28:28,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:28,834 INFO L225 Difference]: With dead ends: 289 [2020-09-17 02:28:28,835 INFO L226 Difference]: Without dead ends: 284 [2020-09-17 02:28:28,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:28:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-17 02:28:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-09-17 02:28:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-17 02:28:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-09-17 02:28:28,839 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-09-17 02:28:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:28,839 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-09-17 02:28:28,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-09-17 02:28:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:28,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:28,840 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:29,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:29,040 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 187 times [2020-09-17 02:28:29,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:29,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316838414] [2020-09-17 02:28:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:29,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316838414] [2020-09-17 02:28:29,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491867181] [2020-09-17 02:28:29,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:29,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:29,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:29,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:28:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:29,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:29,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:29,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358594457] [2020-09-17 02:28:29,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:29,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:29,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:29,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:29,534 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-09-17 02:28:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:31,466 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-09-17 02:28:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:28:31,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:31,469 INFO L225 Difference]: With dead ends: 312 [2020-09-17 02:28:31,469 INFO L226 Difference]: Without dead ends: 304 [2020-09-17 02:28:31,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=559, Invalid=1421, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:28:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-17 02:28:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-09-17 02:28:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:28:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-17 02:28:31,473 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-17 02:28:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:31,473 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-17 02:28:31,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-17 02:28:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:31,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:31,474 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:31,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:31,675 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:31,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 188 times [2020-09-17 02:28:31,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:31,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376230907] [2020-09-17 02:28:31,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:31,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376230907] [2020-09-17 02:28:31,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269072001] [2020-09-17 02:28:31,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:31,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:28:31,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:31,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:32,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:32,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:32,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514314189] [2020-09-17 02:28:32,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:32,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:32,172 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-17 02:28:33,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:33,237 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-09-17 02:28:33,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:28:33,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:33,239 INFO L225 Difference]: With dead ends: 262 [2020-09-17 02:28:33,239 INFO L226 Difference]: Without dead ends: 260 [2020-09-17 02:28:33,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=326, Invalid=864, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:28:33,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-17 02:28:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-09-17 02:28:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:28:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-17 02:28:33,243 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-17 02:28:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:33,243 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-17 02:28:33,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-17 02:28:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:33,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:33,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:33,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-17 02:28:33,445 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:33,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 189 times [2020-09-17 02:28:33,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:33,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586935392] [2020-09-17 02:28:33,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:33,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586935392] [2020-09-17 02:28:33,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338503507] [2020-09-17 02:28:33,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:33,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:28:33,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:33,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:33,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:33,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:33,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443097318] [2020-09-17 02:28:33,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:33,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:33,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:33,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:33,907 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-17 02:28:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:35,185 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-09-17 02:28:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:28:35,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:35,188 INFO L225 Difference]: With dead ends: 271 [2020-09-17 02:28:35,188 INFO L226 Difference]: Without dead ends: 269 [2020-09-17 02:28:35,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:28:35,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-17 02:28:35,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-17 02:28:35,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:28:35,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-17 02:28:35,192 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-17 02:28:35,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:35,192 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-17 02:28:35,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-17 02:28:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:35,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:35,193 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:35,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-17 02:28:35,401 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 190 times [2020-09-17 02:28:35,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:35,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903628542] [2020-09-17 02:28:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:35,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903628542] [2020-09-17 02:28:35,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419103867] [2020-09-17 02:28:35,585 INFO L93 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:35,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:28:35,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:35,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:28:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:35,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:35,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:35,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899337738] [2020-09-17 02:28:35,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:35,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:35,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:35,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:35,885 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-17 02:28:37,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:37,414 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-09-17 02:28:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:28:37,416 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:37,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:37,417 INFO L225 Difference]: With dead ends: 296 [2020-09-17 02:28:37,417 INFO L226 Difference]: Without dead ends: 288 [2020-09-17 02:28:37,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=581, Invalid=1399, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:28:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-09-17 02:28:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-09-17 02:28:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-17 02:28:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-17 02:28:37,421 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-17 02:28:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:37,421 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-17 02:28:37,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:37,421 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-17 02:28:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:37,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:37,422 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:37,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-17 02:28:37,622 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:37,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:37,623 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 191 times [2020-09-17 02:28:37,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:37,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027742311] [2020-09-17 02:28:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:37,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027742311] [2020-09-17 02:28:37,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936628003] [2020-09-17 02:28:37,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:37,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:28:37,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:37,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:37,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:38,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:28:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:38,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:38,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:38,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614067053] [2020-09-17 02:28:38,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:38,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:38,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:38,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:38,086 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-17 02:28:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:39,560 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-09-17 02:28:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:28:39,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:39,563 INFO L225 Difference]: With dead ends: 298 [2020-09-17 02:28:39,563 INFO L226 Difference]: Without dead ends: 290 [2020-09-17 02:28:39,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=500, Invalid=1222, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:28:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-17 02:28:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-17 02:28:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:28:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-09-17 02:28:39,567 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-09-17 02:28:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:39,567 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-09-17 02:28:39,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-09-17 02:28:39,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:39,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:39,568 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:39,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-09-17 02:28:39,768 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 192 times [2020-09-17 02:28:39,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:39,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186682240] [2020-09-17 02:28:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:39,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186682240] [2020-09-17 02:28:39,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763179128] [2020-09-17 02:28:39,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:40,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:28:40,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:40,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:40,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:40,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:28:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:40,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:40,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:40,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490479694] [2020-09-17 02:28:40,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:40,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:40,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:40,264 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-09-17 02:28:41,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:41,899 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-09-17 02:28:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:28:41,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:41,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:41,901 INFO L225 Difference]: With dead ends: 291 [2020-09-17 02:28:41,901 INFO L226 Difference]: Without dead ends: 283 [2020-09-17 02:28:41,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=498, Invalid=1224, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:28:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-17 02:28:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-09-17 02:28:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:28:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-17 02:28:41,905 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-17 02:28:41,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:41,905 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-17 02:28:41,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:41,906 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-17 02:28:41,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:41,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:41,906 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:42,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-17 02:28:42,107 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:42,107 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 193 times [2020-09-17 02:28:42,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:42,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117781498] [2020-09-17 02:28:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:42,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117781498] [2020-09-17 02:28:42,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479402512] [2020-09-17 02:28:42,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:42,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:42,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:42,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:42,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:42,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196595710] [2020-09-17 02:28:42,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:42,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:42,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:42,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:42,658 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-17 02:28:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:43,999 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-09-17 02:28:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:28:44,000 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:44,001 INFO L225 Difference]: With dead ends: 265 [2020-09-17 02:28:44,001 INFO L226 Difference]: Without dead ends: 263 [2020-09-17 02:28:44,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:28:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-17 02:28:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-09-17 02:28:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:28:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-17 02:28:44,004 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-17 02:28:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:44,005 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-17 02:28:44,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-17 02:28:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:44,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:44,005 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:44,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:44,206 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:44,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 194 times [2020-09-17 02:28:44,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:44,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972375436] [2020-09-17 02:28:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:44,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972375436] [2020-09-17 02:28:44,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579184892] [2020-09-17 02:28:44,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:44,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:28:44,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:44,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:44,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:44,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:44,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:44,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858798943] [2020-09-17 02:28:44,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:44,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:44,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:44,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:44,792 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-17 02:28:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:46,441 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-09-17 02:28:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:28:46,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:46,444 INFO L225 Difference]: With dead ends: 262 [2020-09-17 02:28:46,444 INFO L226 Difference]: Without dead ends: 260 [2020-09-17 02:28:46,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=467, Invalid=1173, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:28:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-17 02:28:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-09-17 02:28:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:28:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-17 02:28:46,448 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-17 02:28:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:46,448 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-17 02:28:46,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-17 02:28:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:46,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:46,448 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:46,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-17 02:28:46,649 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 195 times [2020-09-17 02:28:46,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:46,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171926911] [2020-09-17 02:28:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:46,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171926911] [2020-09-17 02:28:46,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500048341] [2020-09-17 02:28:46,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:46,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:28:46,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:46,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:28:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:47,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:28:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:47,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:47,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:28:47,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958383600] [2020-09-17 02:28:47,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:28:47,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:47,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:28:47,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:28:47,182 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-17 02:28:49,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:49,160 INFO L93 Difference]: Finished difference Result 282 states and 683 transitions. [2020-09-17 02:28:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:28:49,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:28:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:49,163 INFO L225 Difference]: With dead ends: 282 [2020-09-17 02:28:49,163 INFO L226 Difference]: Without dead ends: 277 [2020-09-17 02:28:49,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=514, Invalid=1378, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:28:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-09-17 02:28:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 167. [2020-09-17 02:28:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:28:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-17 02:28:49,167 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-17 02:28:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:49,167 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-17 02:28:49,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:28:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-17 02:28:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:28:49,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:49,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:49,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:49,369 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 196 times [2020-09-17 02:28:49,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:49,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437059316] [2020-09-17 02:28:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:49,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437059316] [2020-09-17 02:28:49,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625025660] [2020-09-17 02:28:49,555 INFO L93 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:49,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:28:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:28:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:54,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:28:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:55,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:55,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-17 02:28:55,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303937349] [2020-09-17 02:28:55,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:28:55,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:55,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:28:55,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=223, Unknown=3, NotChecked=0, Total=306 [2020-09-17 02:28:55,671 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-09-17 02:28:59,925 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-09-17 02:29:04,601 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-17 02:29:08,814 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-09-17 02:29:13,252 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-09-17 02:29:15,506 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-17 02:29:24,380 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-09-17 02:29:26,769 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-09-17 02:29:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:55,208 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-09-17 02:29:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:29:55,210 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-17 02:29:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:55,211 INFO L225 Difference]: With dead ends: 302 [2020-09-17 02:29:55,211 INFO L226 Difference]: Without dead ends: 297 [2020-09-17 02:29:55,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=583, Invalid=1480, Unknown=7, NotChecked=0, Total=2070 [2020-09-17 02:29:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-17 02:29:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-09-17 02:29:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:29:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-09-17 02:29:55,215 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-09-17 02:29:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:55,215 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-09-17 02:29:55,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:29:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-09-17 02:29:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:55,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:55,216 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:55,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-17 02:29:55,416 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:55,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 197 times [2020-09-17 02:29:55,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:55,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353923185] [2020-09-17 02:29:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:55,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353923185] [2020-09-17 02:29:55,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347045080] [2020-09-17 02:29:55,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:55,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:29:55,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:55,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:55,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:55,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:55,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290688775] [2020-09-17 02:29:55,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:55,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:55,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:55,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:55,931 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-09-17 02:29:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:56,758 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-09-17 02:29:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:29:56,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:56,761 INFO L225 Difference]: With dead ends: 219 [2020-09-17 02:29:56,761 INFO L226 Difference]: Without dead ends: 217 [2020-09-17 02:29:56,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:29:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-17 02:29:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-09-17 02:29:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:29:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-17 02:29:56,765 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-17 02:29:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:56,765 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-17 02:29:56,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-17 02:29:56,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:56,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:56,766 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:56,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:56,976 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:56,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 198 times [2020-09-17 02:29:56,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:56,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63297043] [2020-09-17 02:29:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:57,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63297043] [2020-09-17 02:29:57,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468415344] [2020-09-17 02:29:57,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:57,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:29:57,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:57,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:57,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:57,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:57,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:57,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964119067] [2020-09-17 02:29:57,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:57,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:57,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:57,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:57,443 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-17 02:29:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:58,262 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-09-17 02:29:58,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:29:58,264 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:58,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:58,265 INFO L225 Difference]: With dead ends: 229 [2020-09-17 02:29:58,266 INFO L226 Difference]: Without dead ends: 224 [2020-09-17 02:29:58,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=270, Invalid=600, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:29:58,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-17 02:29:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-09-17 02:29:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-17 02:29:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-09-17 02:29:58,268 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-09-17 02:29:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:58,269 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-09-17 02:29:58,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-09-17 02:29:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:58,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:58,269 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:58,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:58,470 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:58,471 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 199 times [2020-09-17 02:29:58,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:58,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055799114] [2020-09-17 02:29:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:58,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055799114] [2020-09-17 02:29:58,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284139246] [2020-09-17 02:29:58,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:59,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:59,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:29:59,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596337209] [2020-09-17 02:29:59,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:59,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:59,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:59,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:59,069 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-09-17 02:29:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:59,906 INFO L93 Difference]: Finished difference Result 227 states and 524 transitions. [2020-09-17 02:29:59,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:29:59,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:29:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:59,909 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:29:59,909 INFO L226 Difference]: Without dead ends: 225 [2020-09-17 02:29:59,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:29:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-17 02:29:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2020-09-17 02:29:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-17 02:29:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-17 02:29:59,915 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-17 02:29:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:59,915 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-17 02:29:59,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-17 02:29:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:59,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:59,916 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:00,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-17 02:30:00,121 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 200 times [2020-09-17 02:30:00,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:00,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879822008] [2020-09-17 02:30:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:00,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879822008] [2020-09-17 02:30:00,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773865183] [2020-09-17 02:30:00,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:00,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:30:00,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:00,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:00,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:00,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:00,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:00,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392938165] [2020-09-17 02:30:00,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:00,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:00,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:00,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:00,693 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-17 02:30:01,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:01,479 INFO L93 Difference]: Finished difference Result 231 states and 533 transitions. [2020-09-17 02:30:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:30:01,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:01,481 INFO L225 Difference]: With dead ends: 231 [2020-09-17 02:30:01,481 INFO L226 Difference]: Without dead ends: 229 [2020-09-17 02:30:01,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:30:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-17 02:30:01,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 160. [2020-09-17 02:30:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:30:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-09-17 02:30:01,484 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-09-17 02:30:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:01,484 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-09-17 02:30:01,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-09-17 02:30:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:01,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:01,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:01,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:01,686 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:01,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:01,686 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 201 times [2020-09-17 02:30:01,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:01,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213122605] [2020-09-17 02:30:01,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:01,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213122605] [2020-09-17 02:30:01,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67201471] [2020-09-17 02:30:01,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:01,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:30:01,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:01,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:01,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:02,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:02,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:02,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820387090] [2020-09-17 02:30:02,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:02,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:02,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:02,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:02,441 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-09-17 02:30:03,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:03,470 INFO L93 Difference]: Finished difference Result 244 states and 558 transitions. [2020-09-17 02:30:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:30:03,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:03,472 INFO L225 Difference]: With dead ends: 244 [2020-09-17 02:30:03,472 INFO L226 Difference]: Without dead ends: 242 [2020-09-17 02:30:03,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:30:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-17 02:30:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 164. [2020-09-17 02:30:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:30:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-09-17 02:30:03,476 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-09-17 02:30:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:03,476 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-09-17 02:30:03,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-09-17 02:30:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:03,477 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:03,477 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:03,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-17 02:30:03,679 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:03,680 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 202 times [2020-09-17 02:30:03,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:03,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434723126] [2020-09-17 02:30:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:03,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434723126] [2020-09-17 02:30:03,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153505324] [2020-09-17 02:30:03,903 INFO L93 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:03,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:30:03,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:03,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:03,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:04,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:04,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:04,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722761527] [2020-09-17 02:30:04,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:04,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:04,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:04,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:04,264 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-09-17 02:30:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:04,976 INFO L93 Difference]: Finished difference Result 236 states and 543 transitions. [2020-09-17 02:30:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:30:04,978 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:04,979 INFO L225 Difference]: With dead ends: 236 [2020-09-17 02:30:04,979 INFO L226 Difference]: Without dead ends: 234 [2020-09-17 02:30:04,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:30:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-17 02:30:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-17 02:30:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:30:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-09-17 02:30:04,982 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-09-17 02:30:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:04,982 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-09-17 02:30:04,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-09-17 02:30:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:04,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:04,983 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:05,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-17 02:30:05,184 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 203 times [2020-09-17 02:30:05,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:05,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180720841] [2020-09-17 02:30:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:05,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180720841] [2020-09-17 02:30:05,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817532514] [2020-09-17 02:30:05,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:05,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:30:05,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:05,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:05,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:05,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:05,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:05,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802810112] [2020-09-17 02:30:05,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:05,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:05,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:05,813 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-09-17 02:30:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:06,803 INFO L93 Difference]: Finished difference Result 241 states and 553 transitions. [2020-09-17 02:30:06,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:30:06,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:06,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:06,805 INFO L225 Difference]: With dead ends: 241 [2020-09-17 02:30:06,805 INFO L226 Difference]: Without dead ends: 239 [2020-09-17 02:30:06,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:30:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-17 02:30:06,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2020-09-17 02:30:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:30:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-09-17 02:30:06,809 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-09-17 02:30:06,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:06,809 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-09-17 02:30:06,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-09-17 02:30:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:06,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:06,810 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:07,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-17 02:30:07,010 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:07,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:07,011 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 204 times [2020-09-17 02:30:07,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:07,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457464809] [2020-09-17 02:30:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:07,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457464809] [2020-09-17 02:30:07,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78042859] [2020-09-17 02:30:07,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:07,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:30:07,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:07,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:07,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:07,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:07,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:07,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682538410] [2020-09-17 02:30:07,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:07,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:07,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:07,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:07,618 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-09-17 02:30:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:08,357 INFO L93 Difference]: Finished difference Result 226 states and 520 transitions. [2020-09-17 02:30:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:30:08,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:08,360 INFO L225 Difference]: With dead ends: 226 [2020-09-17 02:30:08,360 INFO L226 Difference]: Without dead ends: 224 [2020-09-17 02:30:08,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:30:08,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-17 02:30:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 156. [2020-09-17 02:30:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:30:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-09-17 02:30:08,363 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-09-17 02:30:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:08,364 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-09-17 02:30:08,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:08,364 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-09-17 02:30:08,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:08,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:08,364 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:08,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-09-17 02:30:08,565 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:08,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 205 times [2020-09-17 02:30:08,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:08,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489490723] [2020-09-17 02:30:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:08,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489490723] [2020-09-17 02:30:08,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41148354] [2020-09-17 02:30:08,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:08,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:09,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:09,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:09,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221906905] [2020-09-17 02:30:09,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:09,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:09,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:09,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:09,161 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-09-17 02:30:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:10,493 INFO L93 Difference]: Finished difference Result 253 states and 578 transitions. [2020-09-17 02:30:10,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:30:10,495 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:10,496 INFO L225 Difference]: With dead ends: 253 [2020-09-17 02:30:10,496 INFO L226 Difference]: Without dead ends: 251 [2020-09-17 02:30:10,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=447, Invalid=1193, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:30:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-17 02:30:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 160. [2020-09-17 02:30:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-17 02:30:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-09-17 02:30:10,499 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-09-17 02:30:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:10,499 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-09-17 02:30:10,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:10,500 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-09-17 02:30:10,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:10,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:10,500 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:10,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-17 02:30:10,701 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 206 times [2020-09-17 02:30:10,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:10,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118330667] [2020-09-17 02:30:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:10,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118330667] [2020-09-17 02:30:10,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779172029] [2020-09-17 02:30:10,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:10,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:30:10,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:10,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:10,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:11,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:11,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:11,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559867779] [2020-09-17 02:30:11,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:11,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:11,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:11,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:11,281 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-09-17 02:30:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:12,586 INFO L93 Difference]: Finished difference Result 249 states and 570 transitions. [2020-09-17 02:30:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:30:12,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:12,589 INFO L225 Difference]: With dead ends: 249 [2020-09-17 02:30:12,589 INFO L226 Difference]: Without dead ends: 247 [2020-09-17 02:30:12,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:30:12,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-17 02:30:12,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2020-09-17 02:30:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-17 02:30:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-09-17 02:30:12,593 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-09-17 02:30:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:12,593 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-09-17 02:30:12,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:12,594 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-09-17 02:30:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:12,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:12,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:12,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:12,795 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:12,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 207 times [2020-09-17 02:30:12,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:12,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020009048] [2020-09-17 02:30:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:12,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020009048] [2020-09-17 02:30:12,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167254919] [2020-09-17 02:30:12,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:13,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:30:13,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:13,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:13,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:13,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:13,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:13,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980170730] [2020-09-17 02:30:13,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:13,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:13,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:13,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:13,560 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-09-17 02:30:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:15,089 INFO L93 Difference]: Finished difference Result 271 states and 615 transitions. [2020-09-17 02:30:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:30:15,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:15,091 INFO L225 Difference]: With dead ends: 271 [2020-09-17 02:30:15,091 INFO L226 Difference]: Without dead ends: 269 [2020-09-17 02:30:15,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=394, Invalid=1012, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:30:15,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-17 02:30:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 163. [2020-09-17 02:30:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-17 02:30:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-09-17 02:30:15,096 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-09-17 02:30:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:15,096 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-09-17 02:30:15,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-09-17 02:30:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:15,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:15,096 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:15,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:15,297 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:15,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 208 times [2020-09-17 02:30:15,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:15,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273270330] [2020-09-17 02:30:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:15,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273270330] [2020-09-17 02:30:15,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729054631] [2020-09-17 02:30:15,496 INFO L93 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:15,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:30:15,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:15,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:15,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:15,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:15,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:15,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944226784] [2020-09-17 02:30:15,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:15,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:15,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:15,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:15,879 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-09-17 02:30:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:16,906 INFO L93 Difference]: Finished difference Result 241 states and 554 transitions. [2020-09-17 02:30:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:30:16,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:16,909 INFO L225 Difference]: With dead ends: 241 [2020-09-17 02:30:16,909 INFO L226 Difference]: Without dead ends: 239 [2020-09-17 02:30:16,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:30:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-17 02:30:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2020-09-17 02:30:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-17 02:30:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-09-17 02:30:16,912 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-09-17 02:30:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:16,913 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-09-17 02:30:16,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-09-17 02:30:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:16,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:16,913 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:17,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:17,114 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 209 times [2020-09-17 02:30:17,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:17,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614865569] [2020-09-17 02:30:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:17,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614865569] [2020-09-17 02:30:17,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352069884] [2020-09-17 02:30:17,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:17,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:30:17,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:17,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:17,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:17,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:17,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:17,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780262643] [2020-09-17 02:30:17,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:17,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:17,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:17,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:17,667 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-09-17 02:30:19,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:19,282 INFO L93 Difference]: Finished difference Result 266 states and 612 transitions. [2020-09-17 02:30:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:30:19,284 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:19,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:19,284 INFO L225 Difference]: With dead ends: 266 [2020-09-17 02:30:19,284 INFO L226 Difference]: Without dead ends: 264 [2020-09-17 02:30:19,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=535, Invalid=1357, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:30:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-17 02:30:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-09-17 02:30:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:30:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-17 02:30:19,288 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-17 02:30:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:19,288 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-17 02:30:19,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-17 02:30:19,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:19,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:19,289 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:19,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:19,490 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:19,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:19,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 210 times [2020-09-17 02:30:19,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:19,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230839016] [2020-09-17 02:30:19,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:19,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230839016] [2020-09-17 02:30:19,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560185857] [2020-09-17 02:30:19,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:19,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:30:19,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:19,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:20,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:20,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:20,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903480402] [2020-09-17 02:30:20,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:20,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:20,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:20,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:20,091 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-17 02:30:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:21,553 INFO L93 Difference]: Finished difference Result 256 states and 592 transitions. [2020-09-17 02:30:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:30:21,555 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:21,556 INFO L225 Difference]: With dead ends: 256 [2020-09-17 02:30:21,556 INFO L226 Difference]: Without dead ends: 254 [2020-09-17 02:30:21,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=418, Invalid=1064, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:30:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-17 02:30:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 164. [2020-09-17 02:30:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:30:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-17 02:30:21,560 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-17 02:30:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:21,560 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-17 02:30:21,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-17 02:30:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:21,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:21,560 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:21,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:21,761 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:21,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 211 times [2020-09-17 02:30:21,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:21,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077791460] [2020-09-17 02:30:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:21,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077791460] [2020-09-17 02:30:21,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388146901] [2020-09-17 02:30:21,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:22,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:22,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:22,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:22,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342795875] [2020-09-17 02:30:22,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:22,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:22,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:22,462 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-17 02:30:24,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:24,065 INFO L93 Difference]: Finished difference Result 263 states and 606 transitions. [2020-09-17 02:30:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:30:24,068 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:24,069 INFO L225 Difference]: With dead ends: 263 [2020-09-17 02:30:24,069 INFO L226 Difference]: Without dead ends: 261 [2020-09-17 02:30:24,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:30:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-09-17 02:30:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 165. [2020-09-17 02:30:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:30:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-17 02:30:24,072 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-17 02:30:24,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:24,073 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-17 02:30:24,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-17 02:30:24,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:24,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:24,073 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:24,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-09-17 02:30:24,274 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:24,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:24,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 212 times [2020-09-17 02:30:24,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:24,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538357273] [2020-09-17 02:30:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:24,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538357273] [2020-09-17 02:30:24,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375692344] [2020-09-17 02:30:24,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:24,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:30:24,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:24,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:24,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:24,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:24,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:24,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498809] [2020-09-17 02:30:24,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:24,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:24,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:24,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:24,979 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-17 02:30:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:26,817 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-09-17 02:30:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:30:26,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:26,820 INFO L225 Difference]: With dead ends: 266 [2020-09-17 02:30:26,820 INFO L226 Difference]: Without dead ends: 264 [2020-09-17 02:30:26,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=588, Invalid=1392, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:30:26,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-17 02:30:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 166. [2020-09-17 02:30:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:30:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-09-17 02:30:26,823 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-09-17 02:30:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:26,823 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-09-17 02:30:26,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-09-17 02:30:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:26,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:26,824 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:27,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-17 02:30:27,025 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:27,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 213 times [2020-09-17 02:30:27,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:27,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488528020] [2020-09-17 02:30:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:27,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488528020] [2020-09-17 02:30:27,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023514235] [2020-09-17 02:30:27,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:27,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:30:27,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:27,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:27,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:27,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:27,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:27,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195632521] [2020-09-17 02:30:27,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:27,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:27,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:27,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:27,621 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-09-17 02:30:29,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:29,172 INFO L93 Difference]: Finished difference Result 250 states and 588 transitions. [2020-09-17 02:30:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:30:29,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:29,175 INFO L225 Difference]: With dead ends: 250 [2020-09-17 02:30:29,175 INFO L226 Difference]: Without dead ends: 248 [2020-09-17 02:30:29,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=450, Invalid=1110, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:30:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-17 02:30:29,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 167. [2020-09-17 02:30:29,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:30:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-17 02:30:29,178 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-17 02:30:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:29,179 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-17 02:30:29,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-17 02:30:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:29,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:29,179 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:29,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-17 02:30:29,380 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:29,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 214 times [2020-09-17 02:30:29,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:29,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212338447] [2020-09-17 02:30:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:29,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212338447] [2020-09-17 02:30:29,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216224544] [2020-09-17 02:30:29,588 INFO L93 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:29,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:30:29,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:29,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:29,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:29,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:29,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:29,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942370354] [2020-09-17 02:30:29,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:29,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:29,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:29,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:29,967 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-17 02:30:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:31,708 INFO L93 Difference]: Finished difference Result 255 states and 608 transitions. [2020-09-17 02:30:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:30:31,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:31,711 INFO L225 Difference]: With dead ends: 255 [2020-09-17 02:30:31,711 INFO L226 Difference]: Without dead ends: 253 [2020-09-17 02:30:31,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:30:31,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-17 02:30:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 169. [2020-09-17 02:30:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:30:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-17 02:30:31,715 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-17 02:30:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:31,715 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-17 02:30:31,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-17 02:30:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:31,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:31,716 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:31,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:31,917 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 215 times [2020-09-17 02:30:31,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:31,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114243687] [2020-09-17 02:30:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:32,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114243687] [2020-09-17 02:30:32,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586430423] [2020-09-17 02:30:32,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:32,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:30:32,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:32,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:32,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:32,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:30:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:32,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:32,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:32,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11722190] [2020-09-17 02:30:32,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:32,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:32,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:32,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:32,442 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-17 02:30:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:33,874 INFO L93 Difference]: Finished difference Result 228 states and 552 transitions. [2020-09-17 02:30:33,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:30:33,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:33,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:33,877 INFO L225 Difference]: With dead ends: 228 [2020-09-17 02:30:33,877 INFO L226 Difference]: Without dead ends: 223 [2020-09-17 02:30:33,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=520, Invalid=1120, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:30:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-17 02:30:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 169. [2020-09-17 02:30:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:30:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-17 02:30:33,881 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-17 02:30:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:33,881 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-17 02:30:33,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-17 02:30:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:33,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:33,882 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:34,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-09-17 02:30:34,086 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:34,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:34,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 216 times [2020-09-17 02:30:34,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:34,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699017176] [2020-09-17 02:30:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:34,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699017176] [2020-09-17 02:30:34,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938299578] [2020-09-17 02:30:34,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:34,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:30:34,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:34,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:34,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:34,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:34,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:34,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:34,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400527953] [2020-09-17 02:30:34,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:34,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:34,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:34,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:34,722 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-17 02:30:36,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:36,891 INFO L93 Difference]: Finished difference Result 280 states and 672 transitions. [2020-09-17 02:30:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:30:36,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:36,894 INFO L225 Difference]: With dead ends: 280 [2020-09-17 02:30:36,894 INFO L226 Difference]: Without dead ends: 275 [2020-09-17 02:30:36,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:30:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-09-17 02:30:36,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 167. [2020-09-17 02:30:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:30:36,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-17 02:30:36,898 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-17 02:30:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:36,898 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-17 02:30:36,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-17 02:30:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:36,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:36,899 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:37,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-09-17 02:30:37,100 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:37,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 217 times [2020-09-17 02:30:37,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:37,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005253709] [2020-09-17 02:30:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:37,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005253709] [2020-09-17 02:30:37,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140081750] [2020-09-17 02:30:37,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:37,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:37,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:37,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:37,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:37,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960312924] [2020-09-17 02:30:37,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:37,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:37,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:37,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:37,716 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-17 02:30:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:39,489 INFO L93 Difference]: Finished difference Result 267 states and 637 transitions. [2020-09-17 02:30:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:30:39,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:39,492 INFO L225 Difference]: With dead ends: 267 [2020-09-17 02:30:39,492 INFO L226 Difference]: Without dead ends: 265 [2020-09-17 02:30:39,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=480, Invalid=1242, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:30:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-17 02:30:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 169. [2020-09-17 02:30:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:30:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-17 02:30:39,500 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-17 02:30:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:39,501 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-17 02:30:39,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:39,501 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-17 02:30:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:39,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:39,501 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:39,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:39,702 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:39,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 218 times [2020-09-17 02:30:39,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:39,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602101408] [2020-09-17 02:30:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:39,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602101408] [2020-09-17 02:30:39,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207407152] [2020-09-17 02:30:39,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:39,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:30:39,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:39,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:39,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:40,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:30:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:40,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:40,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:40,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798020494] [2020-09-17 02:30:40,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:40,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:40,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:40,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:40,416 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-17 02:30:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:42,894 INFO L93 Difference]: Finished difference Result 295 states and 712 transitions. [2020-09-17 02:30:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:30:42,896 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:42,897 INFO L225 Difference]: With dead ends: 295 [2020-09-17 02:30:42,897 INFO L226 Difference]: Without dead ends: 290 [2020-09-17 02:30:42,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=628, Invalid=1534, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:30:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-17 02:30:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-17 02:30:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:30:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-17 02:30:42,901 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-17 02:30:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:42,901 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-17 02:30:42,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-17 02:30:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:42,901 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:42,901 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:43,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:43,102 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:43,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 219 times [2020-09-17 02:30:43,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:43,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051264421] [2020-09-17 02:30:43,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:43,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051264421] [2020-09-17 02:30:43,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15541539] [2020-09-17 02:30:43,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:43,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:30:43,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:43,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:43,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:43,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:43,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:43,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:43,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269681903] [2020-09-17 02:30:43,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:43,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:43,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:43,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:43,704 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-17 02:30:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:46,137 INFO L93 Difference]: Finished difference Result 292 states and 706 transitions. [2020-09-17 02:30:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:30:46,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:46,140 INFO L225 Difference]: With dead ends: 292 [2020-09-17 02:30:46,140 INFO L226 Difference]: Without dead ends: 287 [2020-09-17 02:30:46,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=666, Invalid=1496, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:30:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-09-17 02:30:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 165. [2020-09-17 02:30:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-17 02:30:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-17 02:30:46,143 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-17 02:30:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:46,143 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-17 02:30:46,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-17 02:30:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:46,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:46,144 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:46,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:46,345 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 220 times [2020-09-17 02:30:46,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:46,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575964782] [2020-09-17 02:30:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:46,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575964782] [2020-09-17 02:30:46,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39021142] [2020-09-17 02:30:46,551 INFO L93 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:46,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:30:46,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:46,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:48,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:48,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:48,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852523546] [2020-09-17 02:30:48,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:48,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:48,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:48,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:48,745 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-17 02:30:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:50,725 INFO L93 Difference]: Finished difference Result 283 states and 656 transitions. [2020-09-17 02:30:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:30:50,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:50,728 INFO L225 Difference]: With dead ends: 283 [2020-09-17 02:30:50,728 INFO L226 Difference]: Without dead ends: 281 [2020-09-17 02:30:50,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:30:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-09-17 02:30:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 169. [2020-09-17 02:30:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:30:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-17 02:30:50,732 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-17 02:30:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:50,732 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-17 02:30:50,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-17 02:30:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:50,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:50,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:50,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:50,934 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 221 times [2020-09-17 02:30:50,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:50,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610169424] [2020-09-17 02:30:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:51,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610169424] [2020-09-17 02:30:51,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986691393] [2020-09-17 02:30:51,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:51,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:30:51,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:51,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:51,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:51,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:51,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:51,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539690167] [2020-09-17 02:30:51,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:51,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:51,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:51,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:51,657 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-17 02:30:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:54,081 INFO L93 Difference]: Finished difference Result 278 states and 665 transitions. [2020-09-17 02:30:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:30:54,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:54,084 INFO L225 Difference]: With dead ends: 278 [2020-09-17 02:30:54,085 INFO L226 Difference]: Without dead ends: 276 [2020-09-17 02:30:54,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:30:54,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-09-17 02:30:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 174. [2020-09-17 02:30:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-17 02:30:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-09-17 02:30:54,088 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-09-17 02:30:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:54,089 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-09-17 02:30:54,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-09-17 02:30:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:54,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:54,090 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:54,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-09-17 02:30:54,297 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:54,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 222 times [2020-09-17 02:30:54,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:54,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041896509] [2020-09-17 02:30:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:54,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041896509] [2020-09-17 02:30:54,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053599277] [2020-09-17 02:30:54,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:54,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:30:54,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:54,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:54,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:54,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:30:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:55,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:55,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:30:55,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643293668] [2020-09-17 02:30:55,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:55,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:55,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:55,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:55,029 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-09-17 02:30:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:57,786 INFO L93 Difference]: Finished difference Result 318 states and 774 transitions. [2020-09-17 02:30:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:30:57,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:30:57,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:57,790 INFO L225 Difference]: With dead ends: 318 [2020-09-17 02:30:57,791 INFO L226 Difference]: Without dead ends: 310 [2020-09-17 02:30:57,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=644, Invalid=1612, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:30:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-17 02:30:57,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 176. [2020-09-17 02:30:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-17 02:30:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-09-17 02:30:57,795 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-09-17 02:30:57,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:57,795 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-09-17 02:30:57,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:57,795 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-09-17 02:30:57,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:30:57,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:57,796 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:58,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-17 02:30:58,000 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 223 times [2020-09-17 02:30:58,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:58,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935106784] [2020-09-17 02:30:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:58,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935106784] [2020-09-17 02:30:58,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738288825] [2020-09-17 02:30:58,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:58,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:30:58,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:02,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:31:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:02,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:02,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:02,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229470050] [2020-09-17 02:31:02,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:02,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=199, Unknown=2, NotChecked=0, Total=272 [2020-09-17 02:31:02,790 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-09-17 02:31:07,943 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-09-17 02:31:12,169 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-17 02:31:16,618 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-09-17 02:31:20,957 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-09-17 02:31:25,265 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-09-17 02:31:29,990 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-09-17 02:31:32,608 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-17 02:31:37,185 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-09-17 02:31:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:37,569 INFO L93 Difference]: Finished difference Result 316 states and 769 transitions. [2020-09-17 02:31:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:31:37,572 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:37,573 INFO L225 Difference]: With dead ends: 316 [2020-09-17 02:31:37,573 INFO L226 Difference]: Without dead ends: 308 [2020-09-17 02:31:37,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=664, Invalid=1686, Unknown=2, NotChecked=0, Total=2352 [2020-09-17 02:31:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-09-17 02:31:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 171. [2020-09-17 02:31:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-17 02:31:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-17 02:31:37,578 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-17 02:31:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:37,578 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-17 02:31:37,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-17 02:31:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:37,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:37,579 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:37,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-17 02:31:37,789 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:37,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1316969931, now seen corresponding path program 224 times [2020-09-17 02:31:37,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:37,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177185652] [2020-09-17 02:31:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:38,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177185652] [2020-09-17 02:31:38,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656229735] [2020-09-17 02:31:38,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:38,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:31:38,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:38,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:38,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:38,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:31:38,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:38,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:38,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:38,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418582510] [2020-09-17 02:31:38,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:38,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:38,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:38,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:38,545 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-17 02:31:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:41,848 INFO L93 Difference]: Finished difference Result 318 states and 769 transitions. [2020-09-17 02:31:41,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:31:41,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:41,852 INFO L225 Difference]: With dead ends: 318 [2020-09-17 02:31:41,852 INFO L226 Difference]: Without dead ends: 310 [2020-09-17 02:31:41,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=648, Invalid=1608, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:31:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-17 02:31:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 170. [2020-09-17 02:31:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-17 02:31:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-09-17 02:31:41,856 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-09-17 02:31:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:41,856 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-09-17 02:31:41,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-09-17 02:31:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:41,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:41,857 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:42,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-09-17 02:31:42,060 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1310533370, now seen corresponding path program 225 times [2020-09-17 02:31:42,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:42,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370452544] [2020-09-17 02:31:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:42,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370452544] [2020-09-17 02:31:42,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836301872] [2020-09-17 02:31:42,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:42,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:31:42,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:42,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:42,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:42,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:42,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:42,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236912186] [2020-09-17 02:31:42,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:42,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:42,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:42,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:42,717 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-09-17 02:31:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:44,179 INFO L93 Difference]: Finished difference Result 261 states and 613 transitions. [2020-09-17 02:31:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:31:44,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:44,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:44,182 INFO L225 Difference]: With dead ends: 261 [2020-09-17 02:31:44,182 INFO L226 Difference]: Without dead ends: 259 [2020-09-17 02:31:44,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:31:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-17 02:31:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2020-09-17 02:31:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-17 02:31:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-09-17 02:31:44,186 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-09-17 02:31:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:44,186 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-09-17 02:31:44,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-09-17 02:31:44,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:44,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:44,186 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:44,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-17 02:31:44,387 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:44,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:44,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1289978541, now seen corresponding path program 226 times [2020-09-17 02:31:44,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:44,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322328973] [2020-09-17 02:31:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:44,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322328973] [2020-09-17 02:31:44,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219673661] [2020-09-17 02:31:44,630 INFO L93 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:44,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:31:44,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:44,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:44,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:45,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:45,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:45,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064676305] [2020-09-17 02:31:45,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:45,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:45,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:45,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:45,042 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-09-17 02:31:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:47,264 INFO L93 Difference]: Finished difference Result 280 states and 660 transitions. [2020-09-17 02:31:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:31:47,267 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:47,268 INFO L225 Difference]: With dead ends: 280 [2020-09-17 02:31:47,268 INFO L226 Difference]: Without dead ends: 278 [2020-09-17 02:31:47,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=540, Invalid=1352, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:31:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-09-17 02:31:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-09-17 02:31:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:31:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-09-17 02:31:47,272 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-09-17 02:31:47,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:47,272 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-09-17 02:31:47,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:47,272 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-09-17 02:31:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:47,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:47,272 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:47,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:47,473 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:47,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1289977580, now seen corresponding path program 227 times [2020-09-17 02:31:47,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:47,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741838091] [2020-09-17 02:31:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:47,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741838091] [2020-09-17 02:31:47,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448429344] [2020-09-17 02:31:47,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:47,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:31:47,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:47,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:47,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:48,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:48,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:48,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287359502] [2020-09-17 02:31:48,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:48,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:48,088 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-09-17 02:31:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:49,836 INFO L93 Difference]: Finished difference Result 251 states and 596 transitions. [2020-09-17 02:31:49,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:31:49,838 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:49,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:49,839 INFO L225 Difference]: With dead ends: 251 [2020-09-17 02:31:49,839 INFO L226 Difference]: Without dead ends: 249 [2020-09-17 02:31:49,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:31:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-09-17 02:31:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 164. [2020-09-17 02:31:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:31:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-17 02:31:49,847 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-17 02:31:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:49,847 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-17 02:31:49,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-17 02:31:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:49,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:49,848 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:50,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:50,049 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1289315451, now seen corresponding path program 228 times [2020-09-17 02:31:50,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:50,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045961629] [2020-09-17 02:31:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:50,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045961629] [2020-09-17 02:31:50,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92368410] [2020-09-17 02:31:50,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:50,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:31:50,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:50,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:50,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:50,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:50,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:50,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873724658] [2020-09-17 02:31:50,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:50,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:50,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:50,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:50,709 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-17 02:31:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:53,147 INFO L93 Difference]: Finished difference Result 269 states and 647 transitions. [2020-09-17 02:31:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:31:53,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:53,151 INFO L225 Difference]: With dead ends: 269 [2020-09-17 02:31:53,151 INFO L226 Difference]: Without dead ends: 267 [2020-09-17 02:31:53,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=599, Invalid=1563, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:31:53,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-09-17 02:31:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 166. [2020-09-17 02:31:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:31:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-17 02:31:53,154 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-17 02:31:53,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:53,155 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-17 02:31:53,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-17 02:31:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:53,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:53,155 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:53,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:53,356 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:53,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1289294092, now seen corresponding path program 229 times [2020-09-17 02:31:53,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:53,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044702056] [2020-09-17 02:31:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:53,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044702056] [2020-09-17 02:31:53,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978855927] [2020-09-17 02:31:53,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:53,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:53,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:53,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:31:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:53,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:53,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:53,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727236844] [2020-09-17 02:31:53,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:53,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:53,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:53,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:53,969 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-17 02:31:56,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:56,531 INFO L93 Difference]: Finished difference Result 280 states and 682 transitions. [2020-09-17 02:31:56,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:31:56,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:31:56,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:56,534 INFO L225 Difference]: With dead ends: 280 [2020-09-17 02:31:56,534 INFO L226 Difference]: Without dead ends: 272 [2020-09-17 02:31:56,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=744, Invalid=1908, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:31:56,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-17 02:31:56,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 166. [2020-09-17 02:31:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:31:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-17 02:31:56,538 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-17 02:31:56,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:56,538 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-17 02:31:56,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:31:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-17 02:31:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:31:56,538 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:56,539 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:56,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:56,741 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1289293131, now seen corresponding path program 230 times [2020-09-17 02:31:56,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:56,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275737174] [2020-09-17 02:31:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:57,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275737174] [2020-09-17 02:31:57,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447062723] [2020-09-17 02:31:57,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:57,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:31:57,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:57,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:31:57,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:57,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:57,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:57,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:31:57,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738911335] [2020-09-17 02:31:57,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:31:57,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:31:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:31:57,555 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-17 02:32:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:00,448 INFO L93 Difference]: Finished difference Result 284 states and 697 transitions. [2020-09-17 02:32:00,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:32:00,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:00,452 INFO L225 Difference]: With dead ends: 284 [2020-09-17 02:32:00,452 INFO L226 Difference]: Without dead ends: 276 [2020-09-17 02:32:00,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:32:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-09-17 02:32:00,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 164. [2020-09-17 02:32:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:32:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-17 02:32:00,456 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-17 02:32:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:00,456 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-17 02:32:00,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-17 02:32:00,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:00,456 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:00,456 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:00,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:00,658 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:00,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1289285660, now seen corresponding path program 231 times [2020-09-17 02:32:00,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:00,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675909089] [2020-09-17 02:32:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:00,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675909089] [2020-09-17 02:32:00,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080652945] [2020-09-17 02:32:00,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:00,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:32:00,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:00,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:00,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:01,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:01,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:01,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399974388] [2020-09-17 02:32:01,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:01,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:01,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:01,305 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-17 02:32:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:03,263 INFO L93 Difference]: Finished difference Result 261 states and 630 transitions. [2020-09-17 02:32:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:32:03,266 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:03,267 INFO L225 Difference]: With dead ends: 261 [2020-09-17 02:32:03,267 INFO L226 Difference]: Without dead ends: 259 [2020-09-17 02:32:03,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=478, Invalid=1244, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:32:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-17 02:32:03,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 166. [2020-09-17 02:32:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-17 02:32:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-17 02:32:03,271 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-17 02:32:03,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:03,271 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-17 02:32:03,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:03,271 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-17 02:32:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:03,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:03,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:03,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:03,472 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:03,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1289264301, now seen corresponding path program 232 times [2020-09-17 02:32:03,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:03,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579633934] [2020-09-17 02:32:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:03,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579633934] [2020-09-17 02:32:03,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931861331] [2020-09-17 02:32:03,736 INFO L93 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:03,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:32:03,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:03,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:04,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:32:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:04,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:04,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:04,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572417070] [2020-09-17 02:32:04,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:04,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:04,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:04,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:04,115 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-17 02:32:06,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:06,278 INFO L93 Difference]: Finished difference Result 278 states and 682 transitions. [2020-09-17 02:32:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:32:06,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:06,281 INFO L225 Difference]: With dead ends: 278 [2020-09-17 02:32:06,282 INFO L226 Difference]: Without dead ends: 270 [2020-09-17 02:32:06,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:32:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-09-17 02:32:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 164. [2020-09-17 02:32:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-17 02:32:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-09-17 02:32:06,285 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-09-17 02:32:06,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:06,286 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-09-17 02:32:06,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-09-17 02:32:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:06,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:06,286 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:06,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:06,487 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:06,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1289263340, now seen corresponding path program 233 times [2020-09-17 02:32:06,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:06,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674087466] [2020-09-17 02:32:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:06,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674087466] [2020-09-17 02:32:06,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103594656] [2020-09-17 02:32:06,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:06,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:32:06,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:06,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:06,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:07,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:07,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:07,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:07,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279410319] [2020-09-17 02:32:07,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:07,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:07,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:07,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:07,139 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-09-17 02:32:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:09,857 INFO L93 Difference]: Finished difference Result 294 states and 716 transitions. [2020-09-17 02:32:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:32:09,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:09,860 INFO L225 Difference]: With dead ends: 294 [2020-09-17 02:32:09,861 INFO L226 Difference]: Without dead ends: 286 [2020-09-17 02:32:09,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=634, Invalid=1718, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:32:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-17 02:32:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 157. [2020-09-17 02:32:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-17 02:32:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-09-17 02:32:09,869 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-09-17 02:32:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:09,869 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-09-17 02:32:09,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-09-17 02:32:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:09,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:09,870 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:10,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-09-17 02:32:10,071 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1288370571, now seen corresponding path program 234 times [2020-09-17 02:32:10,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:10,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489066230] [2020-09-17 02:32:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:10,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489066230] [2020-09-17 02:32:10,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273458094] [2020-09-17 02:32:10,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:10,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:32:10,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:10,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:10,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:10,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:32:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:10,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:10,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:10,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377191780] [2020-09-17 02:32:10,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:10,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:10,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:10,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:10,758 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-09-17 02:32:13,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:13,646 INFO L93 Difference]: Finished difference Result 270 states and 648 transitions. [2020-09-17 02:32:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:32:13,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:13,650 INFO L225 Difference]: With dead ends: 270 [2020-09-17 02:32:13,650 INFO L226 Difference]: Without dead ends: 262 [2020-09-17 02:32:13,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=648, Invalid=1704, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:32:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-17 02:32:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 155. [2020-09-17 02:32:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-17 02:32:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-09-17 02:32:13,654 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-09-17 02:32:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:13,654 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-09-17 02:32:13,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-09-17 02:32:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:13,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:13,655 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:13,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:13,858 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:13,859 INFO L82 PathProgramCache]: Analyzing trace with hash -423000859, now seen corresponding path program 235 times [2020-09-17 02:32:13,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:13,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071016415] [2020-09-17 02:32:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:14,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071016415] [2020-09-17 02:32:14,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384265152] [2020-09-17 02:32:14,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:14,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:14,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:14,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:14,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610734950] [2020-09-17 02:32:14,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:14,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:14,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:14,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:14,582 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-09-17 02:32:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:15,899 INFO L93 Difference]: Finished difference Result 235 states and 538 transitions. [2020-09-17 02:32:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:32:15,901 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:15,902 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:32:15,902 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:32:15,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:32:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:32:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 153. [2020-09-17 02:32:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-17 02:32:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-09-17 02:32:15,909 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-09-17 02:32:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:15,910 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-09-17 02:32:15,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-09-17 02:32:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:15,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:15,910 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:16,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-09-17 02:32:16,112 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash -401551339, now seen corresponding path program 236 times [2020-09-17 02:32:16,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:16,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390937896] [2020-09-17 02:32:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:16,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390937896] [2020-09-17 02:32:16,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734161702] [2020-09-17 02:32:16,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:16,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:32:16,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:16,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:16,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:16,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:16,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:16,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430050156] [2020-09-17 02:32:16,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:16,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:16,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:16,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:16,858 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-09-17 02:32:18,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:18,060 INFO L93 Difference]: Finished difference Result 227 states and 520 transitions. [2020-09-17 02:32:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:32:18,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:18,064 INFO L225 Difference]: With dead ends: 227 [2020-09-17 02:32:18,064 INFO L226 Difference]: Without dead ends: 225 [2020-09-17 02:32:18,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:32:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-17 02:32:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 151. [2020-09-17 02:32:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-17 02:32:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-09-17 02:32:18,067 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-09-17 02:32:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:18,067 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-09-17 02:32:18,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-09-17 02:32:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:18,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:18,068 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:18,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-17 02:32:18,269 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:18,269 INFO L82 PathProgramCache]: Analyzing trace with hash -400888249, now seen corresponding path program 237 times [2020-09-17 02:32:18,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:18,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132658371] [2020-09-17 02:32:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:18,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132658371] [2020-09-17 02:32:18,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137336085] [2020-09-17 02:32:18,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:18,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:32:18,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:18,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:18,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:19,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:19,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:32:19,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380492547] [2020-09-17 02:32:19,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:32:19,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:19,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:32:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:32:19,034 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-09-17 02:32:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:20,993 INFO L93 Difference]: Finished difference Result 235 states and 542 transitions. [2020-09-17 02:32:20,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:32:20,996 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:32:20,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:20,997 INFO L225 Difference]: With dead ends: 235 [2020-09-17 02:32:20,997 INFO L226 Difference]: Without dead ends: 233 [2020-09-17 02:32:20,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:32:20,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-17 02:32:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 152. [2020-09-17 02:32:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-17 02:32:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-09-17 02:32:21,001 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-09-17 02:32:21,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:21,001 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-09-17 02:32:21,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:32:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-09-17 02:32:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:32:21,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:21,001 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:21,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:21,202 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:21,203 INFO L82 PathProgramCache]: Analyzing trace with hash -400865929, now seen corresponding path program 238 times [2020-09-17 02:32:21,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:21,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231325328] [2020-09-17 02:32:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:21,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231325328] [2020-09-17 02:32:21,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478786759] [2020-09-17 02:32:21,472 INFO L93 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:21,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:32:21,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:21,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:32:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:21,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:26,087 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-09-17 02:32:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:26,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:26,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-17 02:32:26,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701684130] [2020-09-17 02:32:26,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:32:26,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:26,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:32:26,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2020-09-17 02:32:26,090 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-09-17 02:33:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:09,998 INFO L93 Difference]: Finished difference Result 270 states and 634 transitions. [2020-09-17 02:33:10,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:33:10,007 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-17 02:33:10,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:10,007 INFO L225 Difference]: With dead ends: 270 [2020-09-17 02:33:10,007 INFO L226 Difference]: Without dead ends: 265 [2020-09-17 02:33:10,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=522, Invalid=1280, Unknown=4, NotChecked=0, Total=1806 [2020-09-17 02:33:10,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-17 02:33:10,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 150. [2020-09-17 02:33:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-17 02:33:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-09-17 02:33:10,011 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-09-17 02:33:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:10,011 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-09-17 02:33:10,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:33:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-09-17 02:33:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:10,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:10,012 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:10,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-09-17 02:33:10,213 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash -400837099, now seen corresponding path program 239 times [2020-09-17 02:33:10,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:10,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990786229] [2020-09-17 02:33:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:10,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990786229] [2020-09-17 02:33:10,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388588481] [2020-09-17 02:33:10,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:10,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:33:10,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:10,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:10,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:10,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:10,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-17 02:33:10,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010906039] [2020-09-17 02:33:10,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:33:10,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:10,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:33:10,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:33:10,915 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-09-17 02:33:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:13,009 INFO L93 Difference]: Finished difference Result 241 states and 562 transitions. [2020-09-17 02:33:13,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:33:13,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-17 02:33:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:13,012 INFO L225 Difference]: With dead ends: 241 [2020-09-17 02:33:13,012 INFO L226 Difference]: Without dead ends: 236 [2020-09-17 02:33:13,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:33:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-17 02:33:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 146. [2020-09-17 02:33:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-17 02:33:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-09-17 02:33:13,016 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-09-17 02:33:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:13,017 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-09-17 02:33:13,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:33:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-09-17 02:33:13,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:13,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:13,017 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:13,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:13,218 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:13,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:13,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1019616642, now seen corresponding path program 7 times [2020-09-17 02:33:13,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:13,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855221574] [2020-09-17 02:33:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:13,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855221574] [2020-09-17 02:33:13,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643105014] [2020-09-17 02:33:13,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:14,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:14,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:14,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-17 02:33:14,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222463566] [2020-09-17 02:33:14,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:33:14,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:14,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:33:14,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:33:14,197 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 20 states. [2020-09-17 02:33:14,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:14,817 INFO L93 Difference]: Finished difference Result 206 states and 480 transitions. [2020-09-17 02:33:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:33:14,820 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2020-09-17 02:33:14,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:14,821 INFO L225 Difference]: With dead ends: 206 [2020-09-17 02:33:14,821 INFO L226 Difference]: Without dead ends: 201 [2020-09-17 02:33:14,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:33:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-17 02:33:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-09-17 02:33:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-17 02:33:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2020-09-17 02:33:14,825 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 14 [2020-09-17 02:33:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:14,825 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2020-09-17 02:33:14,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:33:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2020-09-17 02:33:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:14,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:14,825 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:15,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:15,026 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1046764459, now seen corresponding path program 28 times [2020-09-17 02:33:15,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:15,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387803432] [2020-09-17 02:33:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:15,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387803432] [2020-09-17 02:33:15,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700931083] [2020-09-17 02:33:15,313 INFO L93 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:15,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:15,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:15,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:15,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:15,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:15,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:15,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048323007] [2020-09-17 02:33:15,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:15,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:15,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:15,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:15,815 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 19 states. [2020-09-17 02:33:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:16,410 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2020-09-17 02:33:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:33:16,413 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-17 02:33:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:16,414 INFO L225 Difference]: With dead ends: 208 [2020-09-17 02:33:16,414 INFO L226 Difference]: Without dead ends: 205 [2020-09-17 02:33:16,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:33:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-17 02:33:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 167. [2020-09-17 02:33:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:33:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-17 02:33:16,417 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-17 02:33:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:16,418 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-17 02:33:16,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-17 02:33:16,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:16,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:16,418 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:16,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:16,619 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:16,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1739755227, now seen corresponding path program 29 times [2020-09-17 02:33:16,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:16,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128616765] [2020-09-17 02:33:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:16,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128616765] [2020-09-17 02:33:16,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526748619] [2020-09-17 02:33:16,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:16,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:33:16,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:16,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:16,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:17,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:17,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:17,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320831585] [2020-09-17 02:33:17,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:17,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:17,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:17,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:17,507 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-17 02:33:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:18,479 INFO L93 Difference]: Finished difference Result 228 states and 526 transitions. [2020-09-17 02:33:18,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:33:18,483 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-17 02:33:18,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:18,483 INFO L225 Difference]: With dead ends: 228 [2020-09-17 02:33:18,483 INFO L226 Difference]: Without dead ends: 225 [2020-09-17 02:33:18,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:33:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-17 02:33:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 167. [2020-09-17 02:33:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-17 02:33:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-17 02:33:18,487 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-17 02:33:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:18,487 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-17 02:33:18,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-17 02:33:18,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:18,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:18,487 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:18,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:18,688 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:18,689 INFO L82 PathProgramCache]: Analyzing trace with hash 792278443, now seen corresponding path program 30 times [2020-09-17 02:33:18,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:18,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815517997] [2020-09-17 02:33:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:18,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815517997] [2020-09-17 02:33:18,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572140111] [2020-09-17 02:33:18,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:19,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:33:19,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:19,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:19,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:19,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:19,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:19,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117259697] [2020-09-17 02:33:19,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:19,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:19,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:19,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:19,571 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-17 02:33:20,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:20,840 INFO L93 Difference]: Finished difference Result 239 states and 550 transitions. [2020-09-17 02:33:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:33:20,844 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-17 02:33:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:20,845 INFO L225 Difference]: With dead ends: 239 [2020-09-17 02:33:20,845 INFO L226 Difference]: Without dead ends: 236 [2020-09-17 02:33:20,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:33:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-17 02:33:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 168. [2020-09-17 02:33:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-17 02:33:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 414 transitions. [2020-09-17 02:33:20,848 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 414 transitions. Word has length 14 [2020-09-17 02:33:20,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:20,848 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 414 transitions. [2020-09-17 02:33:20,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 414 transitions. [2020-09-17 02:33:20,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:20,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:20,849 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:21,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-09-17 02:33:21,058 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash -69569317, now seen corresponding path program 31 times [2020-09-17 02:33:21,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:21,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434760061] [2020-09-17 02:33:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:21,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434760061] [2020-09-17 02:33:21,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517752007] [2020-09-17 02:33:21,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:21,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:21,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:21,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:21,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:21,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849228776] [2020-09-17 02:33:21,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:21,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:21,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:21,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:21,903 INFO L87 Difference]: Start difference. First operand 168 states and 414 transitions. Second operand 19 states. [2020-09-17 02:33:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:23,405 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2020-09-17 02:33:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:33:23,409 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-17 02:33:23,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:23,409 INFO L225 Difference]: With dead ends: 244 [2020-09-17 02:33:23,409 INFO L226 Difference]: Without dead ends: 241 [2020-09-17 02:33:23,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:33:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-17 02:33:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 169. [2020-09-17 02:33:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-17 02:33:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 419 transitions. [2020-09-17 02:33:23,412 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 419 transitions. Word has length 14 [2020-09-17 02:33:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:23,413 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 419 transitions. [2020-09-17 02:33:23,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 419 transitions. [2020-09-17 02:33:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:23,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:23,413 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:23,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:23,614 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:23,615 INFO L82 PathProgramCache]: Analyzing trace with hash 595365803, now seen corresponding path program 32 times [2020-09-17 02:33:23,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:23,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891805457] [2020-09-17 02:33:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:23,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891805457] [2020-09-17 02:33:23,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074813591] [2020-09-17 02:33:23,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:23,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:23,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:23,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:24,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:24,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:24,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091652718] [2020-09-17 02:33:24,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:24,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:24,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:24,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:24,485 INFO L87 Difference]: Start difference. First operand 169 states and 419 transitions. Second operand 19 states. [2020-09-17 02:33:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:26,061 INFO L93 Difference]: Finished difference Result 243 states and 562 transitions. [2020-09-17 02:33:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:33:26,065 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-17 02:33:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:26,066 INFO L225 Difference]: With dead ends: 243 [2020-09-17 02:33:26,066 INFO L226 Difference]: Without dead ends: 240 [2020-09-17 02:33:26,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=387, Invalid=1019, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:33:26,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-17 02:33:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 170. [2020-09-17 02:33:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-17 02:33:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 424 transitions. [2020-09-17 02:33:26,070 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 424 transitions. Word has length 14 [2020-09-17 02:33:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:26,070 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 424 transitions. [2020-09-17 02:33:26,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 424 transitions. [2020-09-17 02:33:26,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:26,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:26,071 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:26,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-09-17 02:33:26,272 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:26,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:26,272 INFO L82 PathProgramCache]: Analyzing trace with hash 616815323, now seen corresponding path program 33 times [2020-09-17 02:33:26,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:26,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939361093] [2020-09-17 02:33:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:26,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939361093] [2020-09-17 02:33:26,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214378183] [2020-09-17 02:33:26,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:26,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:33:26,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:26,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:26,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:27,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:27,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:27,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961556899] [2020-09-17 02:33:27,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:27,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:27,114 INFO L87 Difference]: Start difference. First operand 170 states and 424 transitions. Second operand 19 states. [2020-09-17 02:33:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:28,541 INFO L93 Difference]: Finished difference Result 238 states and 554 transitions. [2020-09-17 02:33:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:33:28,545 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-17 02:33:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:28,546 INFO L225 Difference]: With dead ends: 238 [2020-09-17 02:33:28,546 INFO L226 Difference]: Without dead ends: 235 [2020-09-17 02:33:28,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=357, Invalid=903, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:33:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-17 02:33:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 172. [2020-09-17 02:33:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-17 02:33:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 431 transitions. [2020-09-17 02:33:28,550 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 431 transitions. Word has length 14 [2020-09-17 02:33:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:28,550 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 431 transitions. [2020-09-17 02:33:28,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 431 transitions. [2020-09-17 02:33:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:28,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:28,551 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:28,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-09-17 02:33:28,752 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:28,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:28,752 INFO L82 PathProgramCache]: Analyzing trace with hash 617507243, now seen corresponding path program 34 times [2020-09-17 02:33:28,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:28,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59087709] [2020-09-17 02:33:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:29,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59087709] [2020-09-17 02:33:29,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603170069] [2020-09-17 02:33:29,033 INFO L93 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:29,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:29,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:29,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:29,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:29,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:29,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:29,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981929948] [2020-09-17 02:33:29,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:29,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:29,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:29,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:29,570 INFO L87 Difference]: Start difference. First operand 172 states and 431 transitions. Second operand 19 states. [2020-09-17 02:33:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:30,673 INFO L93 Difference]: Finished difference Result 223 states and 526 transitions. [2020-09-17 02:33:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:33:30,677 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-17 02:33:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:30,677 INFO L225 Difference]: With dead ends: 223 [2020-09-17 02:33:30,677 INFO L226 Difference]: Without dead ends: 220 [2020-09-17 02:33:30,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:33:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-17 02:33:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 174. [2020-09-17 02:33:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-17 02:33:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 438 transitions. [2020-09-17 02:33:30,680 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 438 transitions. Word has length 14 [2020-09-17 02:33:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:30,680 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 438 transitions. [2020-09-17 02:33:30,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 438 transitions. [2020-09-17 02:33:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:30,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:30,681 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:30,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:30,882 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:30,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:30,883 INFO L82 PathProgramCache]: Analyzing trace with hash 617529563, now seen corresponding path program 35 times [2020-09-17 02:33:30,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:30,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636950091] [2020-09-17 02:33:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:31,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636950091] [2020-09-17 02:33:31,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991280819] [2020-09-17 02:33:31,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:31,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:33:31,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:31,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:31,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:31,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:31,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:31,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:31,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174845586] [2020-09-17 02:33:31,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:31,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:31,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:31,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:31,669 INFO L87 Difference]: Start difference. First operand 174 states and 438 transitions. Second operand 19 states. [2020-09-17 02:33:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:33,032 INFO L93 Difference]: Finished difference Result 228 states and 542 transitions. [2020-09-17 02:33:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:33:33,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-17 02:33:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:33,036 INFO L225 Difference]: With dead ends: 228 [2020-09-17 02:33:33,036 INFO L226 Difference]: Without dead ends: 222 [2020-09-17 02:33:33,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=335, Invalid=787, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:33:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-17 02:33:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 170. [2020-09-17 02:33:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-17 02:33:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2020-09-17 02:33:33,039 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 14 [2020-09-17 02:33:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:33,039 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2020-09-17 02:33:33,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2020-09-17 02:33:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:33,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:33,040 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:33,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-09-17 02:33:33,241 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:33,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1771658259, now seen corresponding path program 240 times [2020-09-17 02:33:33,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:33,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295283217] [2020-09-17 02:33:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:33,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295283217] [2020-09-17 02:33:33,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416400828] [2020-09-17 02:33:33,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:33,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:33:33,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:33,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:33,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:34,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:34,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:34,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796671603] [2020-09-17 02:33:34,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:34,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:34,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:34,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:34,188 INFO L87 Difference]: Start difference. First operand 170 states and 432 transitions. Second operand 19 states. [2020-09-17 02:33:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:34,327 INFO L93 Difference]: Finished difference Result 213 states and 518 transitions. [2020-09-17 02:33:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:33:34,330 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:33:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:34,331 INFO L225 Difference]: With dead ends: 213 [2020-09-17 02:33:34,331 INFO L226 Difference]: Without dead ends: 211 [2020-09-17 02:33:34,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-17 02:33:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2020-09-17 02:33:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-17 02:33:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 462 transitions. [2020-09-17 02:33:34,335 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 462 transitions. Word has length 15 [2020-09-17 02:33:34,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:34,335 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 462 transitions. [2020-09-17 02:33:34,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:34,335 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 462 transitions. [2020-09-17 02:33:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:34,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:34,336 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:34,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:34,536 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1771657298, now seen corresponding path program 241 times [2020-09-17 02:33:34,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:34,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104515296] [2020-09-17 02:33:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:34,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104515296] [2020-09-17 02:33:34,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487736927] [2020-09-17 02:33:34,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:34,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:34,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:35,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:35,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:35,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842689322] [2020-09-17 02:33:35,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:35,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:35,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:35,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:35,420 INFO L87 Difference]: Start difference. First operand 180 states and 462 transitions. Second operand 19 states. [2020-09-17 02:33:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:35,712 INFO L93 Difference]: Finished difference Result 226 states and 544 transitions. [2020-09-17 02:33:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:33:35,715 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:33:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:35,716 INFO L225 Difference]: With dead ends: 226 [2020-09-17 02:33:35,716 INFO L226 Difference]: Without dead ends: 224 [2020-09-17 02:33:35,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:33:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-17 02:33:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 178. [2020-09-17 02:33:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-17 02:33:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-17 02:33:35,720 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-17 02:33:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:35,720 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-17 02:33:35,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-17 02:33:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:35,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:35,721 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:35,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:35,922 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:35,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:35,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1771628468, now seen corresponding path program 242 times [2020-09-17 02:33:35,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:35,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800207359] [2020-09-17 02:33:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:36,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800207359] [2020-09-17 02:33:36,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032878442] [2020-09-17 02:33:36,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:36,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:36,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:36,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:36,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:37,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:37,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:37,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958646557] [2020-09-17 02:33:37,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:37,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:37,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:37,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:37,126 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-17 02:33:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:37,649 INFO L93 Difference]: Finished difference Result 241 states and 574 transitions. [2020-09-17 02:33:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:33:37,652 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:33:37,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:37,653 INFO L225 Difference]: With dead ends: 241 [2020-09-17 02:33:37,653 INFO L226 Difference]: Without dead ends: 239 [2020-09-17 02:33:37,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:33:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-17 02:33:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 176. [2020-09-17 02:33:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-17 02:33:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-17 02:33:37,657 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-17 02:33:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:37,657 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-17 02:33:37,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-17 02:33:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:37,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:37,658 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:37,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:37,859 INFO L427 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:37,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:37,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1770734738, now seen corresponding path program 243 times [2020-09-17 02:33:37,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:37,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046656187] [2020-09-17 02:33:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:38,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046656187] [2020-09-17 02:33:38,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777417080] [2020-09-17 02:33:38,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:38,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:33:38,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:38,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:38,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:38,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:38,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:38,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354861249] [2020-09-17 02:33:38,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:38,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:38,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:38,847 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-17 02:33:39,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:39,620 INFO L93 Difference]: Finished difference Result 243 states and 578 transitions. [2020-09-17 02:33:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:33:39,622 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:33:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:39,623 INFO L225 Difference]: With dead ends: 243 [2020-09-17 02:33:39,623 INFO L226 Difference]: Without dead ends: 241 [2020-09-17 02:33:39,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-17 02:33:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 178. [2020-09-17 02:33:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-17 02:33:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-17 02:33:39,628 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-17 02:33:39,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:39,628 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-17 02:33:39,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-17 02:33:39,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:39,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:39,629 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:39,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:39,837 INFO L427 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:39,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:39,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1770733777, now seen corresponding path program 244 times [2020-09-17 02:33:39,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:39,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256411632] [2020-09-17 02:33:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:40,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256411632] [2020-09-17 02:33:40,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237885175] [2020-09-17 02:33:40,159 INFO L93 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:40,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:40,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:40,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:42,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:42,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:42,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325662970] [2020-09-17 02:33:42,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:42,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:42,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:42,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=238, Unknown=1, NotChecked=0, Total=342 [2020-09-17 02:33:42,952 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-17 02:33:43,321 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2020-09-17 02:33:45,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:45,909 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-17 02:33:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:33:45,912 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:33:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:45,913 INFO L225 Difference]: With dead ends: 253 [2020-09-17 02:33:45,913 INFO L226 Difference]: Without dead ends: 251 [2020-09-17 02:33:45,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=170, Invalid=380, Unknown=2, NotChecked=0, Total=552 [2020-09-17 02:33:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-17 02:33:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 177. [2020-09-17 02:33:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-17 02:33:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-17 02:33:45,922 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-17 02:33:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:45,922 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-17 02:33:45,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-17 02:33:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:45,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:45,923 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:46,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:46,124 INFO L427 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:46,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1770704947, now seen corresponding path program 245 times [2020-09-17 02:33:46,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:46,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513972088] [2020-09-17 02:33:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:46,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513972088] [2020-09-17 02:33:46,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601581922] [2020-09-17 02:33:46,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:46,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:33:46,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:46,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:46,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:47,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:47,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:47,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65669290] [2020-09-17 02:33:47,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:47,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:47,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:47,296 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-17 02:33:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:48,170 INFO L93 Difference]: Finished difference Result 247 states and 589 transitions. [2020-09-17 02:33:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:33:48,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:33:48,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:48,173 INFO L225 Difference]: With dead ends: 247 [2020-09-17 02:33:48,173 INFO L226 Difference]: Without dead ends: 245 [2020-09-17 02:33:48,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:48,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-17 02:33:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 174. [2020-09-17 02:33:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-17 02:33:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-09-17 02:33:48,176 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 15 [2020-09-17 02:33:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:48,176 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-09-17 02:33:48,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-09-17 02:33:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:48,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:48,177 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:48,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-09-17 02:33:48,378 INFO L427 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:48,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:48,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1743029108, now seen corresponding path program 246 times [2020-09-17 02:33:48,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:48,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700096025] [2020-09-17 02:33:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:48,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700096025] [2020-09-17 02:33:48,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191973022] [2020-09-17 02:33:48,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:48,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:33:48,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:48,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:48,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:52,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:52,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:33:52,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815726920] [2020-09-17 02:33:52,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:33:52,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:52,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:33:52,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:52,955 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand 19 states. [2020-09-17 02:33:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:54,146 INFO L93 Difference]: Finished difference Result 245 states and 582 transitions. [2020-09-17 02:33:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:33:54,150 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:33:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:54,151 INFO L225 Difference]: With dead ends: 245 [2020-09-17 02:33:54,151 INFO L226 Difference]: Without dead ends: 243 [2020-09-17 02:33:54,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:33:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-17 02:33:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 177. [2020-09-17 02:33:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-17 02:33:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-17 02:33:54,155 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-17 02:33:54,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:54,155 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-17 02:33:54,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:33:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-17 02:33:54,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:54,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:54,156 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:54,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-09-17 02:33:54,359 INFO L427 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1743028147, now seen corresponding path program 247 times [2020-09-17 02:33:54,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:54,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035794349] [2020-09-17 02:33:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:54,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035794349] [2020-09-17 02:33:54,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605180001] [2020-09-17 02:33:54,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:59,364 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 37 [2020-09-17 02:34:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:03,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:03,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:34:03,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713635482] [2020-09-17 02:34:03,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:34:03,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:03,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:34:03,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=240, Unknown=1, NotChecked=0, Total=342 [2020-09-17 02:34:03,544 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-17 02:34:09,897 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-09-17 02:34:14,227 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 41 [2020-09-17 02:34:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:23,625 INFO L93 Difference]: Finished difference Result 251 states and 595 transitions. [2020-09-17 02:34:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:34:23,629 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:34:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:23,630 INFO L225 Difference]: With dead ends: 251 [2020-09-17 02:34:23,630 INFO L226 Difference]: Without dead ends: 249 [2020-09-17 02:34:23,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=196, Invalid=453, Unknown=1, NotChecked=0, Total=650 [2020-09-17 02:34:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-09-17 02:34:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 176. [2020-09-17 02:34:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-17 02:34:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-17 02:34:23,633 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-17 02:34:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:23,633 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-17 02:34:23,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:34:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-17 02:34:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:34:23,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:23,634 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:23,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-09-17 02:34:23,835 INFO L427 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:23,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1742999317, now seen corresponding path program 248 times [2020-09-17 02:34:23,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:23,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244763545] [2020-09-17 02:34:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:24,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244763545] [2020-09-17 02:34:24,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408017412] [2020-09-17 02:34:24,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:24,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:24,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:24,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:34:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:43,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:43,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:34:43,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060363945] [2020-09-17 02:34:43,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:34:43,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:43,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:34:43,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=232, Unknown=7, NotChecked=0, Total=342 [2020-09-17 02:34:43,752 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-17 02:34:48,139 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-17 02:35:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:10,796 INFO L93 Difference]: Finished difference Result 254 states and 602 transitions. [2020-09-17 02:35:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:35:10,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:35:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:10,801 INFO L225 Difference]: With dead ends: 254 [2020-09-17 02:35:10,801 INFO L226 Difference]: Without dead ends: 252 [2020-09-17 02:35:10,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=206, Invalid=433, Unknown=11, NotChecked=0, Total=650 [2020-09-17 02:35:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-17 02:35:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 177. [2020-09-17 02:35:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-17 02:35:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-17 02:35:10,805 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-17 02:35:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:10,805 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-17 02:35:10,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-17 02:35:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:10,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:10,806 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:11,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2020-09-17 02:35:11,007 INFO L427 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1742104626, now seen corresponding path program 249 times [2020-09-17 02:35:11,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:11,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943834958] [2020-09-17 02:35:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:11,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943834958] [2020-09-17 02:35:11,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074199255] [2020-09-17 02:35:11,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:11,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:35:11,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:11,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:16,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:16,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:35:16,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739193905] [2020-09-17 02:35:16,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:16,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:16,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:16,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:16,171 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-17 02:35:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:17,699 INFO L93 Difference]: Finished difference Result 256 states and 605 transitions. [2020-09-17 02:35:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:35:17,704 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:35:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:17,705 INFO L225 Difference]: With dead ends: 256 [2020-09-17 02:35:17,706 INFO L226 Difference]: Without dead ends: 254 [2020-09-17 02:35:17,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:35:17,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-17 02:35:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 172. [2020-09-17 02:35:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-17 02:35:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 438 transitions. [2020-09-17 02:35:17,709 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 438 transitions. Word has length 15 [2020-09-17 02:35:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:17,709 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 438 transitions. [2020-09-17 02:35:17,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 438 transitions. [2020-09-17 02:35:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:17,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:17,710 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:17,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:17,911 INFO L427 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:17,911 INFO L82 PathProgramCache]: Analyzing trace with hash -884154578, now seen corresponding path program 250 times [2020-09-17 02:35:17,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:17,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542512340] [2020-09-17 02:35:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:18,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542512340] [2020-09-17 02:35:18,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372733559] [2020-09-17 02:35:18,349 INFO L93 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:18,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:18,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:18,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:19,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:19,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:35:19,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879116590] [2020-09-17 02:35:19,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:19,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:19,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:19,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:19,172 INFO L87 Difference]: Start difference. First operand 172 states and 438 transitions. Second operand 19 states. [2020-09-17 02:35:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:20,602 INFO L93 Difference]: Finished difference Result 247 states and 586 transitions. [2020-09-17 02:35:20,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:35:20,607 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:35:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:20,608 INFO L225 Difference]: With dead ends: 247 [2020-09-17 02:35:20,608 INFO L226 Difference]: Without dead ends: 245 [2020-09-17 02:35:20,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:35:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-17 02:35:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 176. [2020-09-17 02:35:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-17 02:35:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-17 02:35:20,611 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-17 02:35:20,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:20,612 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-17 02:35:20,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:20,612 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-17 02:35:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:20,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:20,612 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:20,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:20,813 INFO L427 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:20,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:20,814 INFO L82 PathProgramCache]: Analyzing trace with hash -884153617, now seen corresponding path program 251 times [2020-09-17 02:35:20,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:20,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15505029] [2020-09-17 02:35:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:21,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15505029] [2020-09-17 02:35:21,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270045710] [2020-09-17 02:35:21,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:21,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:35:21,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:21,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:21,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:22,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:22,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-17 02:35:22,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685509894] [2020-09-17 02:35:22,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:22,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:22,090 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-17 02:35:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:23,593 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-17 02:35:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:35:23,599 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-17 02:35:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:23,599 INFO L225 Difference]: With dead ends: 253 [2020-09-17 02:35:23,599 INFO L226 Difference]: Without dead ends: 251 [2020-09-17 02:35:23,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:35:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-17 02:35:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 175. [2020-09-17 02:35:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-17 02:35:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 447 transitions. [2020-09-17 02:35:23,608 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 447 transitions. Word has length 15 [2020-09-17 02:35:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:23,609 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 447 transitions. [2020-09-17 02:35:23,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 447 transitions. [2020-09-17 02:35:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:23,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:23,610 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:23,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:23,811 INFO L427 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:23,812 INFO L82 PathProgramCache]: Analyzing trace with hash -884124787, now seen corresponding path program 252 times [2020-09-17 02:35:23,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:23,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391840554] [2020-09-17 02:35:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:24,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391840554] [2020-09-17 02:35:24,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282352145] [2020-09-17 02:35:24,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:24,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:35:24,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates...